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Hydraulic systems are in general members of the fluid power branch of power transmission. Hydraulic pumps are also members of the hydraulic power pack/hydraulic power unit family. Hydraulic units are encased mechanical systems that use liquids for hydraulics.
The hydraulic systems that hydraulic pumps support exist in a range of industries, among them agriculture, automotive manufacturing, defense contracting, excavation, and industrial manufacturing. Within these industries, machines and applications that rely on hydraulic pumps include airplane flaps, elevators, cranes, automotive lifts, shock absorbers, automotive brakes, garage jacks, off-highway equipment, log splitters, offshore equipment, hydraulic motors/hydraulic pump motors, and a wide range of other hydraulic equipment.
When designing hydraulic pumps, manufacturers have many options from which to choose in terms of material composition. Most commonly, they make the body of the pump–the gears, pistons, and hydraulic cylinders–from a durable metal material. This metal is one that that can hold up against the erosive and potentially corrosive properties of hydraulic fluids, as well as the wear that comes along with continual pumping. Metals like this include, among others, steel, stainless steel, and aluminum.
First, what are operating specifications of their customer? They must make sure that the pump they design matches customer requirements in terms of capabilities. These capabilities include maximum fluid flow, minimum and maximum operating pressure, horsepower, and operating speeds. Also, based on application specifications, some suppliers may choose to include discharge sensors or another means of monitoring the wellbeing of their hydraulic system.
Next, what is the nature of the space in which the pump will work? Based on the answer to this question, manufacturers will design the pump with a specific weight, rod extension capability, diameter, length, and power source.
Manufacturers must also find out what type of substance does the customer plan on running through the pumps. If the application calls for it, manufacturers can recommend operators add other substances to them in order to decrease the corrosive nature of certain hydraulic fluids. Examples of such fluids include esters, butanol, pump oils, glycols, water, or corrosive inhibitors. These substances differ in operating temperature, flash point, and viscosity, so they must be chosen with care.
All hydraulic pumps are composed in the same basic way. First, they have a reservoir, which is the section of the pump that houses stationary fluid. Next, they use hydraulic hoses or tubes to transfer this fluid into the hydraulic cylinder, which is the main body of the hydraulic system. Inside the cylinder, or cylinders, are two hydraulic valves and one or more pistons or gear systems. One valve is located at each end; they are called the intake check/inlet valve and the discharge check/outlet valve, respectively.
Hydraulic pumps operate under the principle of Pascal’s Law, which states the increase in pressure at one point of an enclosed liquid in equilibrium is equally transferred to all other points of said liquid.
To start, the check valve is closed, making it a normally closed (NC) valve. When the check is closed, fluid pressure builds. The piston forces the valves open and closes repeatedly at variable speeds, increasing pressure in the cylinder until it builds up enough to force the fluid through the discharge valve. In this way, the pump delivers sufficient force and energy to the attached equipment or machinery to move the target load.
When the fluid becomes pressurized enough, the piston withdraws long enough to allow the open check valve to create a vacuum that pulls in hydraulic fluid from the reservoir. From the reservoir, the pressurized fluid moves into the cylinder through the inlet. Inside the cylinder, the fluid picks up more force, which it carries over into the hydraulic system, where it is released through the outlet.
Radial pumps are mostly used to power relatively small flows and very high-pressure applications. They use pistons arranged around a floating center shaft or ring, which can be moved by a control lever, causing eccentricity and the potential for both inward and outward movement.
Axial pumps, on the other hand, only allow linear motion. Despite this, they are very popular, being easier and less expensive to produce, as well as more compact in design.
Gear pumps, or hydraulic gear pumps, create pressure not with pistons but with the interlocking of gear teeth. When teeth are meshed together, fluid has to travel around the outside of the gears, where pressure builds.
External gear pumps facilitate flow by enlisting two identical gears that rotate against each other. As liquid flows in, it is trapped by the teeth and forced around them. It sits, stuck in the cavities between the teeth and the casing, until it is so pressurized by the meshing of the gears that it is forced to the outlet port.
Internal gear pumps, on the other hand, use bi-rotational gears. To begin the pressurizing process, gear pumps first pull in liquid via a suction port between the teeth of the exterior gear, called the rotor, and the teeth of the interior gear, called the idler. From here, liquid travels between the teeth, where they are divided within them. The teeth continue to rotate and mesh, both creating locked pockets of liquid and forming a seal between the suction port and the discharge port. Liquid is discharged and power is transported once the pump head is flooded. Internal gears are quite versatile, usable with a wide variety of fluids, not only including fuel oils and solvents, but also thick liquids like chocolate, asphalt, and adhesives.
Various other types of hydraulic pumps include rotary vane pumps, centrifugal pumps, electric hydraulic pumps, hydraulic clutch pumps, hydraulic plunger pumps, hydraulic water pumps, hydraulic ram pumps, portable 12V hydraulic pumps, hydraulic hand pumps, and air hydraulic pumps.
Rotary vane pumps are fairly high efficiency pumps, though they are not considered high pressure pumps. Vane pumps, which are a type of positive-displacement pump, apply constant but adjustable pressure.
Centrifugal pumps use hydrodynamic energy to move fluids. They feature a rotating axis, an impeller, and a casing or diffuser. Most often, operators use them for applications such as petroleum pumping, sewage, petrochemical pumping, and water turbine functioning.
Electric hydraulic pumps are hydraulic pumps powered by an electric motor. Usually, the hydraulic pump and motor work by turning mechanisms like impellers in order to create pressure differentials, which in turn generate fluid movement. Nearly any type of hydraulic pump can be run with electricity. Most often, operators use them with industrial machinery.
Hydraulic clutch pumps help users engage and disengage vehicle clutch systems. They do so by applying the right pressure for coupling or decoupling shafts in the clutch system. Coupled shafts allow drivers to accelerate, while decoupled shafts allow drivers to decelerate or shift gears.
Hydraulic ram pumps are a type of hydraulic pump designed to harness hydropower, or the power of water, to elevate it. Featuring only two moving hydraulic parts, hydraulic ram pumps require only the momentum of water to work. Operators use hydraulic ram pumps to move water in industries like manufacturing, waste management and sewage, engineering, plumbing, and agriculture. While hydraulic ram pumps return only about 10% of the water they receive, they are widely used in developing countries because they do not require fuel or electricity.
Hydraulic water pumps are any hydraulic pumps used to transfer water. Usually, hydraulic water pumps only require a little bit of energy in the beginning, as the movement and weight of water generate a large amount of usable pressure.
Hydraulic pumps are useful for many reasons. First, they are simple. Simple machines are always an advantage because they are less likely to break and easier to repair if they do. Second, because fluid is easy to compress and so quick to create pressure force, hydraulic pumps are very efficient. Next, hydraulic pumps are compact, which means they are easy to fit into small and oddly shaped spaces. This is especially true in comparison to mechanical pumps and electrical pumps, which manufacturers cannot design so compactly. Speaking of design, another asset of hydraulic pumps is their customizability. Manufacturers can modify them easily. Likewise, hydraulic pumps are very versatile, not only because they are customizable, but also because they can work in places where other types of pump systems can’t, such as in the ocean. Furthermore, hydraulic pumps can produce far more power than similarly sized electrical pumps. Finally, these very durable hydraulic components are much less likely to explode than some other types of components.
To make sure that your hydraulic pumps stay useful for a long time, you need to treat them with care. Care includes checking them on a regular basis for problems like insufficient fluid pressure, leaks, and wear and tear. You can use diagnostic technology like discharge sensors to help you with detect failures and measure discharge pressure. Checking vibration signals alone is often not enough.
To keep yourself and your workers safe, you need to always take the proper precautions when operating or performing maintenance and repairs on your hydraulic pumps. For example, you should never make direct contact with hydraulic fluid. For one, the fluid made be corrosive and dangerous to your skin. For two, even if the pump isn’t active at that moment, the fluid can still be pressurized and may potentially harm you if something goes wrong. For more tips on hydraulic pump care and operation, talk to both your supplier and OSHA (Occupational Safety and Health Administration).
Pumps that meet operating standards are the foundation of safe and effective operations, no matter the application. Find out what operating standards your hydraulic pumps should meet by talking to your industry leaders.
The highest quality hydraulic pumps come from the highest quality hydraulic pump manufacturers. Finding the highest quality hydraulic pump manufacturers can be hard, which is why we have we listed out some of our favorites on this page. All of those whom we have listed come highly recommended with years of experience. Find their information nestled in between these information paragraphs.
Once you have put together you list, get to browsing. Pick out three or four hydraulic pump supply companies to which you’d like to speak, then reach out to each of them. After you’ve spoken with representatives from each company, decide which one will best serve you, and get started on your project.
The Power Team P-Series hand pumps come in a variety of configurations to meet the requirements of your application. Along with various oil capacities and flow rates, you can choose from the following options:
Compact design ensures that the Power Team PA6 series pump is lightweight and portable. The PA6 series consists of single-speed pumps designed to drive single-acting cylinders. The power unit of choice for major manufacturers of auto body, frame straighteners and other equipment. Operates at 40-100 psi (3-8 bar) shop air pressure at the pump, dBA 85 at 10,000 psi (700 bar). Serviceable pump motor is not a “throwaway”, providing economical repair. Permanently vented reservoir cap. Internal relief valve protects circuit components, air inlet filter protects motor.
Compact, lightweight and portable the Power Team PA6D series pumps are single-speed pumps for driving double-acting cylinders. The PA6D series pumps operate at 40-100 psi (3-8 bar) shop air pressure at the pump. Designed with longevity in-mind the PA6D series feature internal relief valve protects circuit components, air inlet filter protects motor. Serviceable pump motor is not a “throw away”, providing economical repair. Permanently vented reservoir cap. dBA 85 at 10,000 psi (700 bar) for all PA6 pump.
Ideal for powering single-acting cylinders and portable hydraulic tools, the Power Team PA9 series pumps are easier to operate than a hand pump, designed for efficiency. Built to be economical in service; the PA9 series is not a “throwaway” unit. Unique bladder design for all-position operation and storage. Operates on 40-120 psi (3-8 bar) shop air, at 20 cfm (570 l). Hard-coat anodized aluminum housing. Oil filler with integral safety relief minimizes chance of damage to reservoir bladder if overfilling occurs.
A two-speed pump, the Power Team PA60 series pumps are designed for rapid oil delivery at low pressure to quickly advance cylinder or tool. Equipped with air pressure regulator, air filter and lubricator. Serviceable air motor for economical repair. Internal relief valve protects circuit components. Permanently vented reservoir cap.
Focused on single-speed and low pressure the Power Team PA50 series pump outputs 3,200 PSI / 220 BAR, fitting serviceable requirements for air motor for economical repair. Integrated air inlet filter protects motor. The PA50 series also features a filter in outlet port protects against contaminated systems Assorted reservoirs to suit your application"s requirements.
Rotary-Style Air Motor. Use where air is the preferred source of energy. 3 hp motor starting under full load. Two-speed operation for rapid cylinder advance. Models available with full remote control over advance and return, except PA554. Tandem center valve holds the load when pump is shut-off.
Compact, Portable, Cordless Hydraulic Pump for MRO Applications. Compact, Li-ion 18VDC, 9.0 Ah battery-powered pump provides extended run-time. Two-stage, high-pressure hydraulic pump offers quick tool advancement in the first stage. Extremely compact, lightweight with an ergonomic handle grip and transport strap to ease portability. Self-contained, rubber bladder reservoir allows pump usage in most positions with an impressive capacity of 70 cu. in. usable. Quiet, smooth-running, serviceable brushed 18VDC motor. High-impact, fiberglass reinforced shroud protects your investment in the most demanding and harsh applications. Interchangeable valve configuration accommodates a vast array of applications. CSA rated for intermittent duty, CE compliant.
The 10 series Power Team hydraulic pumps are designed to have a maximum of 690 bar (10,000 psi) at a flow rate of 164 cc/min (10 cu. in/min). All Power Team pumps come fully assembled, and each with the ability to be valved for either single- or double acting cylinders. Designed to be compact can easily mobile, the power team 10 series includes a portable power source is included for hydraulic cylinders, and tools. The permanent magnet motor is strategically constructed to easily start under load, even with reduced voltage conditions. Battery-operated models have 8 foot (2,4 m) power cord with alligator clips to connect to any 12 volt battery, optional rechargeable battery pack with shoulder strap are alternatives for maximum portability. The Power Team 10 series pump typically delivers 15 minutes of continuous operation at 10,000 psi (700 bar) on a single battery. Built to withstand High-impact, shielded with a flame retardant construction.
The Power Team 17 series pump is delibertly designed for maintenance and construction applications up to 55 Ton. For use with single-acting or double-acting cylinders at operating pressures to 10,000 psi (700 bar). For intermittent duty; starts under full load. Equipped with 1⁄2 hp (0,37 kW), 3,450 rpm, single-phase, thermal protected induction motor; 10 ft. remote control cord (PE172S has 25 ft. (7,6 m) cord) Low amperage draw; small generators and low amperage circuits can be used as power source. Extremely quiet noise level (67-81 dBA).
Vanguard Jr. + Power Team 18 series pumps provide two-speed high performance in a light-weight, compact package. Designed to provide a gauge port and metal reservoir on all pump models. Equipped with a 1⁄2 hp (0,37 kW), 115 volt, 60/50 Hz single phase motor that starts under load, even at reduced voltage. Low amperage draw permits use with smaller generators and low amperage circuits. All pumps have a 10 foot (3 m) remote control. CSA rated for intermittent duty. Noise level of 85-90 dBA. For operating hydraulic crimping, cutting or other tools: No. PE184C - Allows you to alternately operate a spring-return cutting and/or crimping tool without disconnecting either tool. Select a port connection with a manual 4-way valve, start the pump with a remote control hand switch and extend the connected tool. When the hand switch is switched to off, the pump stops and the automatic valve opens, allowing the tool to return. In the center (neutral) position, a manual control valve holds the tool in position at the time valve is shifted.
The 21 series Power Team pump and RD5513 cylinder used in a special press that produces pharmaceutical-grade extracts for herbal medicines. Totally enclosed, fan cooled induction motor: 1 hp (0,75 kW), 1,725 rpm, 60 Hz, single phase. Designed intentional for thermal overload protection. Remote control, with 10 foot (3,1 m) cord is standard on pumps with solenoid valves. Manual valve pumps have “Stop”, “Start” and “Run/Off/Pulse” switches. Pump controls are moisture and dust resistant. Motor drip cover with carrying handles and lifting lug. Low noise level of 70 dBA@ 10,000 psi (700 bar). In the event of electrical interruption, pump shuts off and will not start up until operator presses the pump start button. 24 volt control circuits on units with remote controls provide additional user/operator safety.
Ideal for running multiple tools or cylinders from one power unit. Recommended for cylinders up to 75 tons. Two-speed pumps have the same low pressure and high pressure flows from both valves. Flows and pressures of each pump are independent. Delivers 300 cu. in./min. of oil at 100 psi (4,8 liter/min of oil at 7 bar) and 25 cu. in./min. at 10,000 psi (0,4 liter/min at 700 bar) from each pump. 1 1/2 hp, 110/115 volt, 60 Hz (1,12 kW, 220 volt, 50 Hz) induction motor, 10 foot (3,1 meter) remote control and 5 gallon (19 liter) steel reservoir. Models available for operating single-acting or double-acting cylinders. Each power unit contains two separate pumps and two separate valves allowing operator to control multiple processes with one power unit. Both pumps on each power unit are equipped with an externally adjustable pressure relief valve. Not recommended for frequent starting and stopping.
The Power Team 30 series pump is intently ideal for maintenance and construction applications. Operating both single-acting or double-acting cylinders. A dynamically built, Integral roll cage protects the 30 series pump from many forms of damage. 1 hp (0,75 kW), single phase, permanent magnet motor. High performance to weight ratio. Starts under full load even when voltage is reduced to 50% of nominal rating. Quit operations: 82 dBA @ 10,000 psi (700 bar) and 87 dBA @ 0 psi (0 bar). CSA rated for intermittent duty. Remote controls and/or solenoid valves feature 24 volt controls.
The Power Team 46 series is best suited for under the roof maintenance and production applications. Equipped with two-speed high-performance pump, for use with single- or double-acting cylinders at operating pressures to 10,000 psi (700 bar) the 46 series pump is versitile. With a 1 1⁄2 hp (1.12 kW), 3,450 (2,875) rpm single-phase, 60 (50) Hz thermal protected induction motor that starts under full load. Noise level of 77-81 dBA. All equipped with a 10 foot (3,1 m) remote control except PE462S which has a 25 foot (7,6 m) remote control. 24 volt control circuit on all units with remote control. CSA rated for intermittent duty.
A powerful multifaceted pump, the Power Team 55 pump excels at multiple applications. From heavy construction to concrete stressing this pump series is designed for intensity. With low voltage starting possible, the 50/60 Hz universal motor; draws 25 amps at full load, and can start at reduced voltage. CSA rated for intermittent duty. 10 foot (3,1 m) remote motor control (except PE552S which has a 25 foot (7,6 m) remote motor and valve control). True unloading valve achieves greater pump efficiency, allowing higher flows at maximum pressure. Reservoirs available in sizes up to 10 gallons (38 liter). Lightweight and portable. Best weight-to-performance ratio of all Power Team pumps. “Assemble to Order” System: There are times when a custom pump is required. Power Team’s “Assemble to Order” system allows you to choose from a wide range of pre-engineered, off-the shelf components to build a customized pump to fit specific requirements. By selecting standard components you get a “customized” pump without “customized” prices. All pumps come fully assembled, add oil and ready for work.
A compact lightweight pump, the Power Team 60 series is designed for rugged applications and low voltage starting. Experiencing a long, trouble-free life in the most demanding work environments, the 60 series is durable.. Powered by 1 1⁄8 hp, 115 volt, 60/50 Hz (0,84 kW, 220 volt, 60/50 Hz) single phase motor. Starts under load, even at the reduced voltages at construction sites. Optional fan-driven external oil cooler includes rollover guard. Insulated carrying handle. Integral 4" (102 mm) diameter fluid-filled pressure gauge with steel bezel complies with ASME B40.1 Grade A. 0 to 10,000 psi (0 to 700 bar) pressure range in 100 psi (7 bar) increments. Sealed 3⁄4 gallon (4,34 liter (usable) reservoir. Reservoir drain port is standard. Standard oil level sight gauge for accurate oil level monitoring. External spin-on filter removes contaminants from circulating oil to maximize pump, valve and cylinder/tool life.
The Power Team PQ60 series pumps are designed specifically for heavy-duty, extended cycle operation. Integrating single- or double-acting cylinders the PQ60 series is versatile. Constructed for longevity by employing a metal shroud keeps dirt and moisture out of motor and electrical components. An electrical shut-down feature prevents unintentional restarting of motor following an electrical service interruption. Internal relief valve limits pressure to 10,000 psi (700 bar). External relief valve is adjustable from 1,000 to 10,000 psi (70 to 700 bar). The Power Team PQ60 pumps operate below maximum OSHA noise limitation (74-76 dBA). Start and operate under full load, even with voltage reduced by 10%.
The Power Team 120 series pump is exactingly designed for heavy duty, extended cycle operation up to 400 Ton. Built in grit, the series 120 pump can start and operate under full load, even with voltage reduced 10%. An electrical shut-down feature prevents unintentional restarting of motor following an electrical service interruption. Internal relief valve limits pressure to 10,000 psi (700 bar) and an external relief valve is adjustable from 1,000 to 10,000 psi (70 to 700 bar). Pump prewired at factory with a 3 hp, 460 volt, 60 Hz (2,24 kW, 380 volt, 50 Hz), 3 Phase motor. Other electrical configurations are available. 24 volt control circuits on units with remote controls for added user/operator safety. 3 hp (2,24 kW) 3 phase motor with thermal overload protection. Motor starter and heater element supplied as standard equipment; with an intentionally designed metal shroud to keep dirt and moisture out of motor and electrical components. Pumps operate below maximum OSHA noise limitation.
With high tonnage double-acting cylinders, the Power Team 400 series offers both single or multiple cylinder applications. Two-speed high output pump delivers up to 5 gpm (16 liter/min) of oil, with a low noise level of 73-80 dBA. Integral electrical shut-down feature prevents unintentional restarting of motor following an electrical service interruption. Over-current protection prevents damage to motor as a result of overheating. “Stop” and “Start” control buttons are 24 volt. PE4004 has a 4-way/3-position manual valve. The PE4004S has a 4- way/3-position solenoid valve with a 24 volt remote hand switch. External pressure relief valve is adjustable from 1,500 to 10,000 psi (100 to 700 bar). Heavy duty 4" (50,8 mm) diameter casters assure easy maneuvering. 20 gallon (3,927 cu. in. usable) / 75,7 liter (62,8 liter usable) reservoir has a low oil level sight gauge. Powered by a dual voltage 10 hp (7,46 kW), 3 phase, 1,725 (1,437) rpm motor. 3 phase motor has all the electrical components necessary to operate the pump.The customer has no hidden charges when making purchase. Deliver 1,200 cu. in./min. (16 liter/min) of oil @ 200 psi (15 bar), 420 cu. in./min. (5,6 liter/min) of oil @ 10,000 psi (700 bar).
Power team synchronized lifting and lowering system, the MCS ( motion controller system ) series can be used in many hydraulic applications where load position is critical, requiring cylinder synchronization. Whether it is a bridge, a building or any kind of heavy load, with the SPX FLOW power team motion control system, lifting, lowering, pushing, pulling, tilting or positioning loads can be carried out automatically with a high degree of accuracy. The PLC-controlled system is a combination of digital actuation and digital control providing significant advantages such as time savings, repeatability, and extremely low internal stress in the object one is moving. The system also provides documentation for the movement performed.
Extremely durable yet lightweight and operable under low-line voltage conditions, the Power Team PE-NUT series pumps are constructed for challenging conditions. A 115V 5/8 hp (0,46 kW) universal electric motor (50/60 cycle), employing a two-stage pump for efficiency and designed for use with spring-returned remote tools. The PE-NUT series pumps also feature high-pressure safety relief valve, remote hand control with 10-foot (3,1 meter) cord, and a pressure matched quick-coupler supplied. The PE-NUT series uniquely utilizes intermittent duty, piston-type high-pressure pump supercharged by a low-pressure pump. CAUTION: DESIGNED FOR CRIMPING APPLICATION ONLY! This system should not be used for lifting.
Gasoline power ideal for remote locations. A logical choice at work sites where electricity or compressed air are unavailable. For single or double-acting cylinders at operating pressures up to 10,000 psi. All gasoline engine/hydraulic pumps feature Posi-Check® valve to guard against pressure loss when valve is shifted from “advance” to “hold.”
PG303 is for single-acting cylinders, has a 9520 valve with separate internal return line which allows oil from running pump to return to reservoir, independently of cylinder return oil, when valve is in “return” position.
PG1200 Series pumps powered by a Honda 4-cycle, 5.5 hp engine with automatic decompression and electronic ignition. Deliver over 0.5 gallon (130 cu. in.) of oil per minute at 10,000 psi.
Rubber anti-skid insulation on bottom of reservoir resists skidding and dampens vibration. PG1200M-4 and PG1200M-4D include a pump cart with 12” wheels.
The Power Team HB series is purposefully constructed to convert low-pressure portable hydraulic pumps or on-board hydraulic systems, into high pressure power sources. HB series applications include utilities, railroads, construction, riggers and others. This product operates single or double-acting cylinders, jacks, and tools such as crimpers, spreaders, cable cutters, or tire tools. Version for use with double-acting torque wrenches available. May be used to operate two separate, single-acting tools (with integral valves) independently, without need for additional manifold. Control valve included. Other Power Team valves available as an option to suit your specific application, if needed; consult factory. Compact and rugged for use inside a utility vehicle aerial bucket or stowing in a vehicle. No reservoir level to maintain; uses low pressure system as oil supply. Has 3⁄8" NPTF ports; compatible with standard fittings for low and high pressure systems.
Portable two-speed pump operated in any position (open or closed-center) providing pressures up to 10,000 psi for the operation of high-pressure tools.
These compact, lightweight boosters do not have reservoirs. The units can be operated in any position on either open- or closed-center (accumulator) hydraulic systems.
“Assemble to Order” means you can choose a basic pump with gas, air or electric motor. Then select the proper valve, gauge, pressure control, motor control and reservoir. You get a two-stage pump that gives high oil volume for fast cylinder approach (and return with double-acting cylinders) in the first stage and high pressure in the second stage.
3 HP Jet Motor, Three-Phase. Gives low noise level and long life due to its moderate operating speed. Ideal for fixed installations. Consists of basic 10,000 psi pump, jet pump motor: 3 hp, 3,450 rpm, 230/460VAC, 60 or 50 cycle (specify). AC three-phase, with thermal overload switch. Equipped with internal and external relief valve. Will start under load.
or cannot be used. The 5,000 or 10,000 psi pump has a 3 hp air-driven motor at 3,000 rpm (optimum performance based on 80 psi air pressure and 50 cfm at the pump). You can drive single or double-acting cylinders with the correct valve. NOTE: 80 psi air supply required to start under full load.
unavailable. It is capable of continuous operation at full pressure. Consists of basic 10,000 psi pump, 4-cycle Briggs & Stratton “Diamond Edge” gasoline engine, developing 6 hp. As with all these pumps, this unit can be valved for use with either single or double-acting cylinders.
In November, Tianjin-Shimadzu Hydraulic Equipment Co., Ltd. (TSH) will start construction on a new plant for the manufacture of hydraulic gear pumps and control valves for forklift trucks in the Xiqing Economic-Technological Development Area, Tianjin City, China. Prior to that, on September 26, 2018, Shimadzu Corporation increased its investment in TSH by 20 million U.S. dollars in preparation for the start of production of hydraulic equipment. The new plant is scheduled for completion in September 2020, and TSH expects annual hydraulic gear pump production to reach 300,000 in fiscal 2023, double the 2018 production level.
With the growth in e-commerce, the volume of goods distributed in China has increased. As a result, the market for forklift trucks is growing, and demand for hydraulic gear pumps and control valves, which are essential for forklift trucks, is also increasing. To satisfy the high demand from customers, the new plant will adopt advanced production technologies to achieve high productivity and quality. Unmanned transport vehicles and robots will be used to promote automation and labor-savings. In addition, TSH is planning to maximize the plant utilization ratio by introducing a system to visualize process management and equipment operating status. Overall Shimadzu Group productivity will be improved by sharing production data in real -time with Shimadzu Precision Technology Ltd., which is in charge of manufacturing hydraulic equipment in Japan.
The forklift truck market in China is expected to be boosted by the move to electric vehicles due to emission regulations on combustion engines. Shimadzu aims to expand sales opportunities worldwide through its low electric power consumption and low noise technologies.
Danfoss Power Solutions is introducing a high-quality and efficient mobile pump, mobile motor, onboard display screens, operating handles, sensors and safety controllers for both entire vehicles and mainframe manufacturers of aerial platforms. These products will come with a vehicle control program suitable for the Chinese market, as well as a complete set of electro-hydraulic aerial platform solutions.
A large touchscreen display allows monitoring of overall fluid demand, control fluid supply and balance the load to distribute hydraulic fluid power only when and where it is needed. This ability to control up to 8 HPUs as a single system helps improve productivity, reduce energy costs and prolong equipment life.
With features that maximize electrical efficiency and minimize water consumption, and options for remote monitoring of pressure, temperature and fluid level, these HPUs will help reduce facility energy costs. For additional energy savings, the larger units can be equipped with a run-on-demand option that reduces electrical power and cooling water consumption when the system is not running at full capacity.
Every OEM says it wants quality, but the reality is that machine builders can choose from countless hydraulic components that vary widely in performance and price—from cheap, “throw-away” parts to high-quality and, more-expensive, products that are built to last.
How does an engineer sort out the various offerings? Here’s a look at one fluid-power manufacturer’s unique philosophy on making a well-crafted pump, thanks to a keen understanding of how poorly built pumps fail.
Most pump designers begin with theoretical concepts of fluid power and mechanical engineering to create a product that should suit the customer’s needs. Hydraulics manufacturer Permco Inc., based in Streetsboro, Ohio, has taken a different tack on the route to building high-quality parts.
Permco’s roots began in the early 20th century as a small shop servicing Appalachian mining equipment. “Unlike most traditional manufacturers, we got our start in this industry on the repair side. We had the chance to start at the opposite end of the learning curve—with failures—and looked at all the things that could possibly go wrong,” said Robby Shell, the company’s chief operating officer.
It’s hard to imagine worse operating conditions for hydraulics than in underground coal mines, he explained. Mechanics routinely dealt with units with internal parts burned due to overheating, seized from lack of lubrication, fouled with contaminants or damaged due to overpressure conditions. They also learned firsthand a sense of urgency to make a repair right the first time and get machines up and running quickly, as the cost of unexpected breakdowns can run into the tens of thousands of dollars an hour.
“Take our gear pumps. We looked at many designs and the best gear design, based on our experience in differentials and transmissions for these applications, has a gear tooth that is shaped vertically, and then shaved after the shaping process,” he said.
In contrast, virtually every other competitor cuts their gears on horizontal hobbing machines, said Shell. “Just by the nature of a hobbing tool, those gears will have a crowned profile from end to end. When new, the difference isn’t noticeable.” But over time, as the gears rotate against each other and the housing, a crowned gear creates leak paths. Pumps with vertically cut gears, in contrast, have a straighter tooth profile and wear more uniformly, and thus maintain efficiencies longer, he said. “We were gear cutters in the old days, and that background taught us to implement design features that enhance the operation of our pumps. The way we shape and shave our gears creates a better tooth profile.”
Some hydraulics manufacturers rely on their own foundries and pour their own housing castings. “Well, in the foundry world, technology is really, really expensive. Upgrades are very costly, so there is a natural reluctance against constantly investing in the newest systems,” noted Shell.
Companies like Permco aren’t boxed in. They have the luxury of choosing foundries that rely on the latest and best technology. Not only are there cosmetic differences between state-of-the-art castings versus older offerings. It also results in higher density and fewer porosity issues, which translate into better mechanical integrity and machinability.
Another differentiator among pump manufacturers, in Shell’s view, is that some make high-quality, well-engineered products, and others either don’t understand the basics or simply don’t care.
“For instance, some years ago Permco developed a game-changing thrust plate called a diverter plate,” he said. When subjected to system pressure, the gears in a pump tend to flex and move toward the low-pressure side. To compensate, company engineers developed thrust plates incorporating precision grooves that create a minute flow path to divert high-pressure fluid to the inlet side. In turn, that helps balance bearing loads.
When the patents expired some competitors copied the plates and, without understanding why the feature is there, went one step further and introduced a bi-rotational version—with flow paths in both directions for running a pump clockwise and counterclockwise. They surmised that if the diverter works in one direction, a design suited for both directions would be even better. In reality, the bi-ro design doesn’t work because it creates too many leak paths and efficiency drops severely. But unsophisticated pump builders don’t know that. “We see a lot of those types of issues. They don’t understand the nuances of what this groove really does. They know it has 14° a chamfer on it. Why 14° not 16°? They can’t tell you those things,” said Shell.
Not only do such differences matter in design and manufacturing, they hold for how pumps are assembled, too. Building a high-quality pump is meticulous work, stressed Shell. “Our people do prep work very similar to what you would see in a good engine rebuild shop.” For instance, they might take a honing stone or emery cloth and kiss a few areas on the gear before installation. That’s because when gears are pulled from a warehouse shelf and moved to the assembly station, it’s not unheard of to accidentally bump and nick a gear. If that gear gets assembled as is, and it subsequently rides on the soft bronze plate, the burr will cut a groove and create a leak path. Left unchecked, that pump will run inefficiently and underperform. Few manufacturers take such a hands-on approach to quality, emphasized Shell.
“But probably the biggest thing that differentiates us is we test every pump that goes out of this building. For peace of mind from the customer’s standpoint, that’s huge,” he stressed. Each pump gets assembled with new parts to create a tight package. Then it’s run up to 2,000 psi pressure, where the components flex and the gears will take a take a slight wipe—removing perhaps 0.0005 to 0.001 in. of material from the housing. That’s acceptable, notes Shell, because filters on the test benches trap the wear particles, instead of remaining behind to contaminate a customer’s hydraulic system.
Finally, the approved product is assigned a serial number that includes the initials of the assembler—as a further sign of the workmanship that stands behind a high-quality pump.
“I guarantee you many other manufacturers don’t take the extra care we put into these units,” said Shell, and it shows when they test competing products. “Some of the dump-truck pumps coming in from offshore sources—mainly China—have failure rates upwards of 10 to 15%. Ours is less than one quarter of 1%.”
It’s due to a different mindset behind the way they build pumps, versus Permco’s philosophy, he emphasized. Some manufacturers feel units made to less-stringent standards are acceptable because often, they only see light duty. Take the case of a typical dump truck: the duty cycle for the hydraulics is often quite limited, he noted. Generally, a truck gets loaded, transports material to a site, and only then is the pump switched on—where it operates for perhaps a minute to raise, dump and lower the bed. And the cycle might get repeated perhaps a dozen times per day.
So, in theory, a dump pump designed and built to handle just light, intermittent duty should be more than adequate, he continued. But the world isn’t perfect—many things can and will go wrong, said Shell. For instance, the operator keeps the pump on too long and it overheats; or it runs low on oil; or the truck bed is overloaded, and a pump with no margin of safety is overtaxed and fails.
A well-engineered, high-quality pump can overcome many of these issues; lesser products can’t, he said. “We understand how offshore units are built and we can predict, generally speaking, how they will fail.” Almost all of these areas of weakness get addressed in Permco’s engineering, manufacturing, assembly and testing processes—steps that are missing in pumps coming from offshore sources. But those manufacturers justify an increased failure rate because their pump costs $50 less to make, said Shell.
“We saw the invasion of these offshore dump pumps a few years ago, and we had plenty of opportunity to make this same pump in China. So we had two choices in that market. Either join it, and it’s just a race to the bottom. Or offer something that differentiates us from the rest of the market.” That’s where the American Champ, Permco’s pumps like the Gemini series comes in, he explained.
The pumps are engineered and manufactured based on Permco’s years of experience, and assembled in the U.S. from globally sourced, world-class components. What’s interesting is that many of the pump components are made not only in the company’s Ohio plant, but in Permco’s manufacturing operation in Tianjin, China.
“It’s all about a different way of thinking. Again, we came out of the mining component repair world. When a Joy mining machine breaks down and sits idle for 16 hours, and a rebuilt transmission gets carted six miles underground to make the repair, it is imperative that when power is switched on, the work was done right.” The focus is on getting the equipment up and running again, not on saving a few dollars on a pump that might fail in short order, or may not work at all.
Dump pumps, as the name indicates, are routinely used in hydraulic circuits for lifting and lowering dump truck and trailer beds. The basic design typically includes a pump section, a directional control valve and a relief valve incorporated into the pump as a complete package, with internal fluid connections to the components. They have been around for more than 50 years and are common throughout the industry.
A notable innovation is now shaking up that market. Permco has developed a unit that sets it apart from conventional dump pumps. The Gemini DG-20/RG-20 is designed for-dual use applications, thanks to a second set of relief valves and selector valves. That lets the Gemini not only control a dump bed, it can also control a walking (live) floor.
Walking floors are used on trailers that do not tip, like a dump trailer. Instead, slats on the movable floor transport and “walk” the load off the end. They’re frequently used in the refuse industry, in landscaping to handle mulch and wood chips, and in other areas where height restrictions would severely limit the capability to raise a dump bed.
Walking-floor trailers tend to operate at higher pressures than hydraulics in dump applications. Traditionally, that has meant a fleet operator with dump trucks requires separate tractors for walking floors. Now, thanks to the Gemini pump, an operator can run a dump truck, and then switch the same tractor to a trailer with a walking floor. Equipping the vehicle with a Gemini pump system lets the operator easily change pressure settings on demand, and eliminates the need for a dedicated rig that can easily cost $150,000.
The load check and relief are also self-cleaning. Because it mounts in the flow stream, and clearances are sufficiently large, contaminants are flushed away—so there are few occurrences where the relief valve can’t open or close and a bed drifts or hangs up. That, according to Permco officials, offers a distinct advantage over competing designs.
The Gemini is rated for 37 gpm at 1,800 gpm and runs at two pressures, low (2,000 psi) for dump bodies and high (typically 3,200 psi) for live floors. Operators can easily switch from low to high pressure using cab-mounted controls. The pump includes dowelled construction and is assembled in the U.S. and 100% factory tested. In addition to use on dump trailers and walking floors, the Gemini is also suitable for gooseneck transporters, dump trucks, crane-equipment vehicles, roll-off trucks and refuse collection
Equipment manufacturers in every major global market are launching full-electric and diesel-electric vehicles to respond to increasing market demands, reduce carbon footprints and stay competitive with state-of-the-art technologies. The push for electrification does not mean the eventual complete replacement of hydraulics with electric motors, however. Instead, the industry will work toward electrifying off-highway platforms in the most efficient ways possible, to make maximum use of the advantages provided by hydraulic and electric technology.
Heavy-duty construction, agricultural and working machines that typically use diesel engines to power their drivetrains and hydraulics now are rapidly being electrified. Some construction-equipment suppliers now offer a complete line of heavy-duty machines that are entirely battery electric. This class of equipment often is referred to as the high-voltage machine class. Multiple industry drivers are powering this electrification movement:
Controllability: An electric motor offers instantaneous torque control, which may result in fine-tuned control of the drivetrain with a superior level of productivity, compared to combustion engine and hydraulic drivetrains. Electric system control algorithms give operators the ability to manage battery life through proper power distribution in a simpler manner. In addition, controllability of hydraulic-driven equipment implements also can be fine-tuned with variable-speed electric motors driving the hydraulic pumps.
Nevertheless, for construction, agricultural and other off-highway applications, creating and consistently delivering the power needed to move the machine and/or its load lies at the heart of mobile-machine engineering. Applications and operating environments matter.
For example, a combine harvester working in a rural location moves constantly over acres of distance, with some implements being hydraulically powered and others with less-demanding requirements (such as steering control) using electromechanical devices. For a fully electric combine, the availability of high-kilowatt (kW) recharging stations or other power sources to recharge in remote locations could remain limited.
One interim solution already being implemented by some OEMs is to have replaceable battery packs for machines operating under these conditions – it would be a standard service that would be established and managed remotely, enabling battery-electric machines to continue making inroads in these particularly challenging off-highway applications.
Diesel-electric: In this configuration, the drivetrain motors and hydraulics power are provided by a combination of a combustion engine and electrics drawing from batteries. This configuration is similar to hybrid passenger cars and trucks. For some construction vehicles, this can be a plug-in vehicle; the battery can be charged from a fixed utility line, so the diesel engine doesn’t have to run to power the drivetrain or implements. Or the engine can be operated in a load-leveling mode where the unused engine power is used to charge the batteries in the system.
To succeed, mobile-machine electrification needs robust, reliable technology to ensure the machine’s implements have the power needed to do their jobs. Electrification in off-highway applications must make optimum use of electric and hydraulic components. It takes a certain amount of power to enable the implements to handle the job, which calls for hydraulic pumps, valves and electronic controls that are both compact and powerful enough to fit into tight machine enclosures while providing the required performance.
As electric drives replace diesel engines to power the implement’s hydraulic pumps, leading hydraulics providers are engineering a new generation of pumps and other hydraulics components. Until recently, hydraulic pumps have been designed around diesel engine speeds, noise levels and engine frequencies, among other characteristics. The next generation of hydraulic pumps are designed to couple with electric drives, operate optimally with the natural frequencies of electric motors and respond more efficiently to drives with a much greater range of speeds, rather than the low idle and high idle of a combustion engine.
This efficient power-management software is not limited to managing drivetrain power consumption. Leading technology suppliers also have advanced implement controls that build on in-depth expertise to optimize hydraulics performance.
For example, electronic load sensing (eLS) is an established controls technology that adjusts the hydraulic pump displacement dynamically, based on flow requirements at different actuator load levels. The newest version of this kind of technology combines electric-powered hydraulic pumps with pre-compensated valve platforms, such as the RM mobile control valve, to more reliably ensure that the required hydraulic power is available and integrates advanced recuperation to maximize machine efficiency.
The newest generation of 700-volt electric motors and inverters, along with a new generation of gearboxes, hydraulic components and controls, is rapidly advancing the pace and potential applications for diesel-electric and battery-electric heavy-duty mobile machines. It’s also clear that hydraulics has a vital role in these machines, due to the reliability and power density that only hydraulics can supply. As off-highway OEMs expand their electric portfolios, there are advantages to working with technology suppliers with broad experience designing solutions that utilize both kinds of technologies to advance mobile-machine performance and value.
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A 12 volt electric hydraulic pump is a mechanical system that transforms hydraulic energy power into mechanical power. To overcome pressure caused by the load from the hydraulic system, it generates hydraulic oil flow with adequate strength.
It serves two functions while a dc hydraulic pump runs. First, the hydraulic gear pump produces a vacuum at the suction inlet of the pump that allows the air pressure to push the hydraulic oil liquid through the inlet suction filter of the pump from the hydraulic tank reservoir. Second, this liquid is transmitted to the pump outlet by its mechanical action which drives it into your hydraulic systems such as hydraulic dump trailer cylinders.
A mechanical power source that converts hydraulic energy power into mechanical power is a 12-volt DC hydraulic pump (hydrostatic energy i.e. flow, pressure). It creates flow with sufficient strength in order to overcome pressure induced by the load at the pump outlet. As a 12-volt DC motor runs, it creates a vacuum at the pump inlet that moves hydraulic oil liquid from the hydraulic oil tank along the inlet line to the pump and sends this hydraulic oil liquid by mechanical action to the pump outlet and drives it into the hydraulic systems.
In order to transfer energy from one electrical power to another motion, a 12-volt hydraulic system uses sealed fluid and then produces other different motions, such as linear motion, rotary motion, or force. The hydraulic power unit (12-volt hydraulic pump) provides the hydraulic power that is required for this fluid transfer.
DC motor powered by battery, the gear pump suction hydraulic oil from hydraulic tank reservoir, powered hydraulic oil fluid goes into hydraulic central manifold bock, pressure over check valve cracking pressure and then move the hydraulic cylinder. System pressure higher than check valve cracking pressure. It will open the relief valve setting pressure when the cylinder is fully open. The electrical power was changed to linear motion.
There would be various design features distinct from a traditional pumping system for a massive, robust hydraulic power unit. But the 12 volt hydraulic pump is a very simple hydraulic system. The main items are:Hydraulic central manifold:These are containers to which hydraulic actuators may be connected. They also gather DC motors, gear pumps, and hydraulic oil tanks. most of the hydraulic valves also mounting in this hydraulic component.
12v hydraulic pump motor: A 12v hydraulic power unit will be fitted with a DC12v hydraulic pump motor with a start relay. Normally this kind of DC motor is S3 work duty, can not work for a long time. only mins.
Tanks:A hydraulic power pack tank is a holding unit built to have ample capacity to pump the fluid in the pipes into it. Similarly, actuator fluid can need to flow into the tank often. And it can make oil heat exchange and release air from hydraulic oil.
Filters:Usually, a filter is mounted on top of the tank if it is a big hydraulic power unit, but 12-volt electric hydraulic pump is a small hydraulic power unit, so, the filter is just in the gear pump suction pipe. It will help your hydraulic system clean, to make sure all your hydraulic components can work stable.
Coolers and Heaters:An air cooler should be mounted in a hydraulic power unit to keep temperatures from rising above operating parameters. Similarly, as the DC 12v hydraulic pump motor is an S3 work duty compact hydraulic power unit, it does not design with coolers or heaters, its’ tank will make oil cool.
Remote control switch: The operation of the 12v hydraulic pump are some wire remote control switch.12v hydraulic pump single-acting complete with 3 wire dump trailer remote control switch and 12 volt double-acting hydraulic pump comes with 4 wire dump trailer remote control switch.
Hydraulic pumps are widely used in practically any single hydraulic power transfer scheme. The device which converts mechanical energy into hydraulic power energy, which is a combination of hydraulic pressure and flow, is a hydraulic pump. Any system you can input force to which in turn produces flow can be a hydraulic pump.
Hydraulic pumps are used more prolifically for mobile applications than by industrial equipment since electric actuators are usually not used by mobile machinery.
In a tiny box, DC electric hydraulic power units pack can supply a lot of power. On dump trucks, stackers, snowplows, forklifts, and hundreds of other applications that include a self-contained, mobile hydraulic power pack, these 12-volt electric hydraulic pumps are widely used. These small electric hydraulic pumps & power units have been engineered for years to weather harsh conditions and provide consistent efficiency.
12v hydraulic pump single acting and 12v hydraulic pump double acting are the most common DC 12v hydraulic power units. Some others are also available such as dual double acting hydraulic pump,4xdouble acting hydraulic pump,etc
You must determine whether the viscosity( (VG)) can be correctly used to fulfill the specifications of your hydraulic system pump in order to choose some hydraulic fluid. The various oil viscosity amounts will be suggested by the oil manufacturers. This would be important to various kinds of pump forms.
You must ensure that the hydraulic oil is properly cooled in order for your hydraulic power pack to work more effectively and last for a longer time. Sometimes you should mount a hydraulic oil cooler with your hydraulic pump systems if your hydraulic system is a longtime running system.
For hydraulic systems that place high demands on control engineering, servo pumps are the perfect solution. The basic version of these pump systems also consists of three main components:Servo inverter
Servo pumps control the pressure or the volume flow. They precisely convert electrical energy into the hydraulic energy that is currently needed in the system. The classic use of valves for control can be either completely or partially omitted. This considerably simplifies every hydraulic system.