quiet hydraulic pump brands

In axial piston fixed pumps, the flow is proportional to the drive speed and the displacement. Axial piston fixed pumps are available for hydrostatic drives in open circuit.

... control options provide the flexibility to match the pump to a wide range of pressing, punching and other operations. Compare the ZE2 to the other pumps in the ZE-Series and determine the best pump ...

... piston pump type V30D is designed for open circuits in industrial hydraulics and operate according to the swash plate principle. They are available with the option of a thru-shaft for operating additional ...

... adopted for conventional pumps. Accordingly, multiple pumps can be assembled using silent stages together with conventional stages, and silent pumps can also be equipped with all the ...

Gear pump with reversible Rotation direction and internal drainage. Built in aluminium body, lighter than casting pumps, permits to work at high pressures with a low level of noise.

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 ...

... 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 ...

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 ...

Like all the pumps of the HP Series, it is suitable for any hydraulic application which require very high hydraulic output pressures and a moderate and controllable oil flow, to ensure ...

... HP-LEVER pump of the HP Series is a single-acting air-hydraulic pump with manual operation with an ergonomic lever. It has an oil flow rate of 2.4 to 0.1 l / min and operating pressures ...

Air hydraulic pump, double pneumatic motor, double effect, foot operated with lock-up function, lever distributor valve (4/3), 10L tank, oil flow 8.5 / 0.26 l / min

Gear pumps GP1K Group 1 is an Ideal solution for hydraulic power packs. Modern technologies and many years of experience of the HYDROSILA company allow us to create pumps with high reliability ...

... variable displacement pump DPVD impresses with its innovative technology. Thanks to the inverse piston, the pump manages large swing angles and can be used with nominal pressures up to 400 bar. The model ...

The best match of low-noise and high-efficiency! The helical shape of the patented Elika® profile eliminates the phenomenon of air encapsulation typical of normal gear pumps, curing the ...

... DIN is a series of in-line dual flow pumps with extremely low noise levels for demanding mobile hydraulics. SLPD 20/20-64/32 DIN comes in eight different sizes, where ...

1. High pressure fixed vane pump with high working efficency and can be applied in hydraulic circuits. ...

PGP 500 pumps offer superior performance, high efficiency and low noise operation at high operating pressures. They are produced in four frame sizes (PGP 502, PGP 505,PGP 511, PGP 517) ...

Continuum pumps are used to pump fluids in a continuous flow. They are often used in industries such as the chemical, oil and gas industry, water treatment plants, and power stations as well as in forklifts, machine tools, and on boats.

These silent pumps’ helical rotors don’t trap any fluid volume. Continuum pumps run highly efficiently while still producing minimal sound, continuous flow can be maintained even at maximum operating speed. They produce exremely low vibrations and low pulsations, operating silently which helps to not disrupt operations and prevent noise pollution or complaints.

Pumps are a vital part of any water or wastewater project, and choosing the right one is an important decision. Continuum pumps are one of the most popular options because they offer a number of advantages over other types, such as centrifugal pumps. Here at Antech, we can help you choose the right pump for your project or application, we have a team of experts who have been supplying hydraulic equipment for many years and know all the ins and outs of it.

Here at Antech, we’re complete experts in everything to do with hydraulic engineering, as well as our team always being happy to help our existing customers, past customers, and potential future customers. We always provide fantastic customer service and our team is always here to provide advice and guidance when you need it. Simply use our contact form, email us, or call our number and you’ll be put through to a member of our fantastic sales team.

Hydraulic pumps are used for a variety of purposes, including moving liquids and gases. The best brands for hydraulic pumps can be a crucial part of your business, so it’s important to do your research before making a purchase. In this article, we’ll take a look at some of the best brands out there and recommend which ones might be right for you.

Rexroth pumps are known for their quality and reliability. They are often used in industries such as manufacturing, construction, and agriculture. Their pumps are also approved by many government agencies, including the National Highway Traffic Safety Administration (NHTSA). This means that they are guaranteed to meet all safety requirements.

Another reason why Rexroth pumps are so popular is their price tag. They are usually cheaper than other brands, which makes them a good option for budget-conscious businesses. Plus, Rexroth pumps tend to last longer than other brands, which is a bonus.

Keeping a market expectations mindset, Bosch Rexroth is setting a new standard for hydraulic pumps with continuous development at the highest standards and quality. Rexroth pumps are designed for high reliability and efficiency.

The lineup of pumps includes: Axial Piston Pumps, External Gear Pumps, Internal Gear Pumps, Gerotor Pumps, Vane Pumps, Radial Piston Pumps and Electro-hydraulic Pumps.

Rexroth pumps are designed as a solution point of view where the products are compatible with each other in order to provide a whole portfolio for our customers.

To help keep your systems operating safely and at maximum efficiency, Rexroth offers a wide range of pump accessories. Replacement seals, safety valve, mounting flanges, brackets, and adapters make installation easier and faster.

Continuous development within hydraulic pumps industry and latest technologies at the highest level of development Bosch Rexroth will always provide the best matched reliable products for your business.

One of the best brands for hydraulic pumps is Kawasaki. They have a wide range of products, from small pump systems to large engines. Their quality is always top notch, and their customer service is excellent.

Wide range of Kawasaki products contribute designing highly efficient and controllable hydraulic system based on many year research and development and the market experiences.

One of the best brands for hydraulic pumps is Linde. Linde supplies pumps to a wide range of industries, including oil and gas, construction, and water resources. They have a wide range of products that are perfect for different applications.

Linde pumps are some of the most reliable on the market. They are built to last and are designed to handle harsh conditions. Their hydraulics are also some of the most accurate in the industry. This means that they can produce high levels of pressure without causing damage to the equipment or the surrounding environment.

We – Linde Hydraulics – develop, produce and globally supply modular drive systems consisting of hydraulics, power transmissions and electronics. As a leading technology provider in the field of high pressure hydraulics, the systems produced by us set the standard in terms of significantly reducing fuel consumption and CO2 emissions.

Our product range comprises hydraulic pumps and motors, valves, electronic controls and peripheral devices. We are a development partner and supplier of a number of reputable manufacturers of mobile work machinery, including construction, mining, agricultural, forestry and municipal utility machines, as well as manufacturers of industrial machinery.

When it comes to hydraulic pumps, Eaton is one of the most trusted brands on the market. Eaton hydraulic pumps are used in a variety of industries, including construction, mining, and agricultural. They are also some of the most popular pumps for use in industrial applications.

Eaton hydraulic pumps are built with durability in mind. They are designed to withstand a lot of wear and tear. This means that they will last for years without any problems. Eaton hydraulic pumps also have a wide range of features and capabilities. This makes them perfect for a variety of applications.

Denison hydraulic pumps are designed to be rugged and flexible. They can handle a variety of different pressures and temperatures, which means they can be used in a wide range of industries.

Another advantage of Denison hydraulic pumps is their price. They are typically cheaper than other brands, which makes them a good option for small businesses that don’t have a lot of money to spend.

We stock remanufactured and new aftermarket Denison® pumps and motors. Including: M4 T6, T67, T7, P6, P7, M6, M7, M8, P14, M14 series. Many units are in stock and available for immediate delivery. All units are fully tested and set to OEM specifications before leaving any of our facilities and are backed by an industry leading warranty.

These cast iron compact, external gear pumps are designed to pump fluids with lubricating qualities. Haldex GC Series pumps are ideal for use in a wide variety of material handling, agricultural and construction equipment, robotics, and machine tools.

Haldex hydraulic pumps are some of the strongest and most reliable pumps available. They are also very easy to use, which makes them perfect for a variety of applications.

Haldex hydraulic pumps are perfect for businesses that need to maintain high levels of production. Their reliability ensures that businesses can continue to operate at high levels even in tough conditions.

Parker’s Hydraulic Pump and Power Systems Division provides a broad selection of piston pumps, hydraulic motors and power units that help our customers meet their industrial and mobile application needs. Our division is the result of the Parker piston pump business’s acquisition of Denison Hydraulics and merger with the Parker Oildyne Division.

Reach higher hydraulic working pressures, get better reliability, higher efficiencies, and achieve lower operating costs and improved productivity on your heavy-duty equipment with Parker’s line of piston pumps and vane pumps, electro-hydraulic actuators, hydraulic motors and power units, piston motors and hydrostatic transmissions.

Parker hydraulic pumps are some of the most reliable on the market. They are able to handle a variety of applications, including oil and gas production. This makes them the perfect choice for businesses that need a reliable pump.

The quality of Parker hydraulic pumps is also unparalleled. They are built with precision and care, which ensures that they Functions flawlessly. Therefore, businesses who consider purchasing a Parker pump should not hesitate because they will not be disappointed.

There are a lot of brands of hydraulic pumps available on the market, but Daikin hydraulic pump is the best choice for most applications. This is because Daikin hydraulic pump are designed specifically for hydraulic applications. They have a high degree of accuracy and reliability, which makes them perfect for a variety of applications.

Daikin hydraulic pump are also very durable. They can handle a lot of stress and pressure, which means they can be used in a variety of situations. Their versatility means that they can be used in a wide range of industries and applications.

Danfoss hydraulic pumps are some of the most reliable on the market. They are designed to withstand heavy use and are able to deliver accurate measurements. Their precision makes them ideal for use in industrial settings and in agricultural settings.

Trust our compact piston pumps to give your transmission the power it needs with the low emissions that satisfy today’s global regulations. Performance, power density and functionality are standard features of our axial piston pumps for the diverse off-highway mobile market. We have the displacement, configuration, and control option to suit your specific open or closed-circuit system.

There are a lot of brands for hydraulic pumps, but Moog is the best. Moog hydraulic pumps are built to last and are known for their quality and performance. They are also very affordable, making them a good option for small businesses and businesses that need to keep costs low.

Moog hydraulic pumps come in a variety of sizes and styles, so they can be used for a variety of applications. They can be used to pump water, oil, or gas. They are also very versatile, able to be used in both commercial and industrial settings.

Moog is the leading supplier for Radial Piston Pumps (RKP) worldwide. This mature and robust product has been used for decades and runs today in over 100,000 machines in various applications around the globe. It is widely known for its robust and reliable design.

In the current generation, Moog made significant product improvements in the design to make it quieter and more compact, while offering rapid response times and high volumetric efficiencies.

If you are in the market for a hydraulic pump, then you will want to check out the list of the best 10 brands. These brands have been known for their quality and durability when it comes to hydraulic pumps, which is why they make this list.

The high pressure and large capacity pump with ample experience is combined with an electric motor by introducing a unique bellhousing. This development realizes compact pump units. Furthermore the flexible mount of the hydraulic pump alleviates the vibration and system noise.

By Kawasaki Silent System which realizes the best class of low noise characteristics in the industries of high pressure hydraulic deck machinery, it contributes to the improvement of living environment for passengers and crews on the vessel such as ferry.

The unique design of the PQ120 Series electric hydraulic pump allows operators to start and operate under full load, even with voltage reduced by 10%. It is suitable for cylinders of up to 400 tons and is designed specifically for heavy-duty operation with a throughput of up to 1.6 litres per minute.

These gear pumps are specified with helical teeth and a special finishing process that significantly reduce hydraulic pulsation of the oil flow, resulting in lower noise levels and consequently recommending them as the best option for all mobile equipment and industrial applications where superior acoustic comfort is a requirement.

Quiet-running and modular. Aluminium and cast iron components of the silent series are designed applying the same modular logic as adopted for conventional pumps. Accordingly, multiple pumps can be assembled using silent stages together with conventional stages, and silent pumps can also be equipped with all the accessories available for other series. Silent pumps with cast iron body, besides being suitable for heavy duty applications, also offer better performance in terms of mechanical noise reduction.

116 quiet hydraulic pump products are offered for sale by suppliers on Alibaba.comAbout 50% % of these are pumps, 17%% are hydraulic pumps, and 2%% are construction machinery parts.

A wide variety of quiet hydraulic pump options are available to you, You can also choose from piston pump, gear pump quiet hydraulic pump,as well as from 1 year, 1.5 years, and 3 years quiet hydraulic pump, and whether quiet hydraulic pump is united states, indonesia, or spain.

The RKP-D family of products has an intelligent control mechanism that allows the user to optimize the usage of control entities within a hydraulic system, often making the need for central control hardware redundant

Moog is the leading supplier for Radial Piston Pumps (RKP) worldwide. This mature and robust product has been used for decades and runs today in over 100,000 machines in various applications around the globe. It is widely known for its robust and reliable design.

In the current generation, Moog made significant product improvements in the design to make it quieter and more compact, while offering rapid response times and high volumetric efficiencies.

The Moog Radial Piston pump comes in 8 pump sizes between 19 cc and 140 cc per revolution (19, 32, 45, 63, 80,100, 140 and 250) and has a maximum speed range of 1,800 to 2,900 rpm

Large selection of controls, including standard pressure compensator (Type F), remote pressure compensator (Type H), pressure and flow control (Type J,R) and digital electro-hydraulic control (RKP-D)

Hydraulic pumps are used in hydraulic drive systems and can be hydrostatic or hydrodynamic. A hydraulic pump is a mechanical source of power that converts mechanical power into hydraulic energy (hydrostatic energy i.e. flow, pressure). It generates flow with enough power to overcome pressure induced by the load at the pump outlet. When a hydraulic pump operates, it creates a vacuum at the pump inlet, which forces liquid from the reservoir into the inlet line to the pump and by mechanical action delivers this liquid to the pump outlet and forces it into the hydraulic system.

Hydrostatic pumps are positive displacement pumps while hydrodynamic pumps can be fixed displacement pumps, in which the displacement (flow through the pump per rotation of the pump) cannot be adjusted, or variable displacement pumps, which have a more complicated construction that allows the displacement to be adjusted. Hydrodynamic pumps are more frequent in day-to-day life. Hydrostatic pumps of various types all work on the principle of Pascal"s law.

Gear pumps (with external teeth) (fixed displacement) are simple and economical pumps. The swept volume or displacement of gear pumps for hydraulics will be between about 1 to 200 milliliters. They have the lowest volumetric efficiency (η

A rotary vane pump is a positive-displacement pump that consists of vanes mounted to a rotor that rotates inside a cavity. In some cases these vanes can have variable length and/or be tensioned to maintain contact with the walls as the pump rotates. A critical element in vane pump design is how the vanes are pushed into contact with the pump housing, and how the vane tips are machined at this very point. Several type of "lip" designs are used, and the main objective is to provide a tight seal between the inside of the housing and the vane, and at the same time to minimize wear and metal-to-metal contact. Forcing the vane out of the rotating centre and towards the pump housing is accomplished using spring-loaded vanes, or more traditionally, vanes loaded hydrodynamically (via the pressurized system fluid).

Screw pumps (fixed displacement) consist of two Archimedes" screws that intermesh and are enclosed within the same chamber. These pumps are used for high flows at relatively low pressure (max 100 bars (10,000 kPa)).ball valves

The major problem of screw pumps is that the hydraulic reaction force is transmitted in a direction that"s axially opposed to the direction of the flow.

Bent axis pumps, axial piston pumps and motors using the bent axis principle, fixed or adjustable displacement, exists in two different basic designs. The Thoma-principle (engineer Hans Thoma, Germany, patent 1935) with max 25 degrees angle and the Wahlmark-principle (Gunnar Axel Wahlmark, patent 1960) with spherical-shaped pistons in one piece with the piston rod, piston rings, and maximum 40 degrees between the driveshaft centerline and pistons (Volvo Hydraulics Co.). These have the best efficiency of all pumps. Although in general, the largest displacements are approximately one litre per revolution, if necessary a two-liter swept volume pump can be built. Often variable-displacement pumps are used so that the oil flow can be adjusted carefully. These pumps can in general work with a working pressure of up to 350–420 bars in continuous work.

By using different compensation techniques, the variable displacement type of these pumps can continuously alter fluid discharge per revolution and system pressure based on load requirements, maximum pressure cut-off settings, horsepower/ratio control, and even fully electro proportional systems, requiring no other input than electrical signals. This makes them potentially hugely power saving compared to other constant flow pumps in systems where prime mover/diesel/electric motor rotational speed is constant and required fluid flow is non-constant.

A radial piston pump is a form of hydraulic pump. The working pistons extend in a radial direction symmetrically around the drive shaft, in contrast to the axial piston pump.

Repairing and supplying re-manufactured and new Parker hydraulics. We service and supply Parker Hydraulics pumps, Parker hydraulics valves, Parker hydraulics cylinders and Parker hydraulics motors so search our online catalog or contact us and let us know how we can help you..

We can supply what you need or repair what you have. Before purchasing, there may be a good chance that your current hydraulic pump, motor, valve or cylinder can be repaired. Parker hydraulics pump repairs, including motors, cylinders and valves, comes with our two year warranty.

When purchasing, consider Parker hydraulics remanufactured or after market hydraulic units. Best of all they can get you back up and running for less than the cost of a new hydraulic unit. We will give you a free quote so you can compare costs for a new, repaired or reman Parker unit.

In 1924, founder Arthur L. Parker saved the company from bankruptcy, restarting the hydraulic components division for automatic and aviation customers. When Parker died in 1945, his wife Helen hired new management, which helped rebuild the business. Their son Patrick Parker eventually took control.

1978 saw Parker introduce Win Strategy and then in Europe, Parker gathered many companies in fluid power business from 1997 including Commercial Hydraulics and VOAC Hydraulics. In 2005, after Patrick Parker died, two mile stones were met. Company sales reached $8.2 billion and the Parker won the bid for the Boeing 787 Dreamliner passenger jet hydraulic subsystem.

Environment:Parker Hydraulics acts carefully, protecting the world all around so our products limit polluting anything important to customers’ health.

Parker Hydraulics’ gear pumps have operating pressures up to 3,650 psi and speeds up to 2,000 rpm while offering superior performance which gives optimal efficiency and low noise at high operating pressures. Gear pump sizes range from 8-19cc. Screw pumps are dependable and economical low pressure pumps are free from pulsations, ensuring a long service life and quiet operation.

Pressure relief groove special designs ensures low flow pulsations and low noise levels. Generated rotor double-feeds provide first-rate suction ability while dual shaft bearing ensures long service life. Pressure chambers special designs ensures low pressure pulsations while any extra material mixture makes the pump light and compact.

Piston pumps’ two independently controlled over-center piston pumps on a single input drive shaft are housed in a compact reservoir with a filter and associated valving while input speed is 3600 RPM and intermittent pressure is 2600 PSI.

Brake motors often applied with hydraulic release brakes, have superior side load capacity, a high pressure shaft seal and a low speed operation making them ideal for heavy duty applications requiring a parking or holding brake while common brake motor applications include man-lifts, winches, and boom rotates.

Check valves flow devices used mainly in hydraulic systems, remove potential damage caused by fluid back pressure. Available one- and two-stage poppets pilot ratios of 1:5 and 1:40 allow for a wider variety of operating conditions. Their designs ensure an easy configuration of stack systems while they provide a good price-performance ratio.

Needle valves function for speed controls on hydraulic and pneumatic systems where a reverse flow check is not needed while they provide excellent control and a reliable shutoff in a very small envelope. A two-step needle allows fine adjustment at low flow by using the first three turns of the adjusting knob. The next three turns open the valve to full flow, and also provide standard throttling adjustments.

Heavy duty tie rod hydraulic cylinders ratings for use at working pressures up to 210 bars depend on the rod end and type of service while options include feedback transducers and position switches, integral cushions, oversize ports, stop tubes, stroke limiters, gland drains, and rod end protection. Applications include machine tools, transfer lines, injection molding, presses, test equipment and robotics.

This line of hydraulic cylinders’ premium quality and heavy duty aspects lack fatigue at their full rated pressure of 160 bars. Features include removable glands and separate bodies with detachable heads and caps, ensuring ease of maintenance while their accompanying piston rod diameters range from 22mm to 220mm.

Hydraulic pumps play a vital role in your hydraulic system and machinery. Choosing the right pump can ultimately save you a lot of money by preventing potential malfunctions and costly operational downtime.

We’re confident we can find the pump that is right for you or that you’re looking for. We can assist you in purchasing new units, or if your existing hydraulic pump is now obsolete, we can help you source a direct equivalent.

We also offer a hydraulic pump repair service. Our repaired and refurbished hydraulic pumps are virtually indistinguishable to a brand new unit. As part of our service, we strip and assess the pump and provide a free of charge quote. In addition to pump repairs, we also repair and supply hydraulic cylinders, hydraulic motors and hydraulic power packs.

The goal of a hydraulic pump is to move hydraulic fluid through a hydraulic system, acting much like the beating heart of the system. There are two things that all hydraulic pumps have in common: (1) they provide hydraulic flow to other components (e.g., rams, hydraulic motors, cylinder) within a hydraulic system, and (2) they produce flow which in turn generates pressure when there is a resistance to flow. In addition, most hydraulic pumps are motor-driven and include a pressure relief valve as a type of overpressure protection. The three most common types of hydraulic pumps currently in use are gear, piston, and vane pumps.

In a gear pump, hydraulic fluid is trapped between the body of the pump and the areas between the teeth of the pump’s two meshing gears. The driveshaft is used to power one gear while the other remains idle until it meshes with the driving gear. These pumps are what is known as fixed displacement or positive displacement because each rotation of the shaft displaces the same amount of hydraulic fluid at the same pressure. There are two basic types of gear pumps, external and internal, which will be discussed in a moment.

Gear pumps are compact, making them ideal for applications that involve limited space. They are also simple in design, making them easier to repair and maintain. Note that gear pumps usually exhibit the highest efficiency when running at their maximum speed. In general, external gear pumps can produce higher levels of pressure (up to 3,000 psi) and greater throughput than vane pumps.

External gear pumps are often found in close-coupled designs where the gear pump and the hydraulic motor share the same mounting and the same shaft. In an external gear pump, fluid flow occurs around the outside of a pair of meshed external spur gears. The hydraulic fluid moves between the housing of the pump and the gears to create the alternating suction and discharge needed for fluid flow.

External gear pumps can provide very high pressures (up to 3,000 psi), operate at high speeds (3,000 rpm), and run more quietly than internal gear pumps. When gear pumps are designed to handle even higher pressures and speeds, however, they will be very noisy and there may be special precautions that must be made.

External gear pumps are often used in powerlifting applications, as well as areas where electrical equipment would be either too bulky, inconvenient, or costly. External gear pumps can also be found on some agricultural and construction equipment to power their hydraulic systems.

In an internal gear pump, the meshing action of external and internal gears works with a crescent-shaped sector element to generate fluid flow. The outer gear has teeth pointing inwards and the inner gear has teeth pointing outward. As these gears rotate and come in and out of mesh, they create suction and discharge zones with the sector acting as a barrier between these zones. A gerotor is a special type of internal gear pump that eliminates the need for a sector element by using trochoidal gears to create suction and discharge zones.

Unlike external gear pumps, internal gear pumps are not meant for high-pressure applications; however, they do generate flow with very little pulsation present. They are not as widely used in hydraulics as external gear pumps; however, they are used with lube oils and fuel oils and work well for metering applications.

In a piston pump, reciprocating pistons are used to alternately generate suction and discharge. There are two different ways to categorize piston pumps: whether their piston is axially or radially mounted and whether their displacement is fixed or variable.

Piston pumps can handle higher pressures than gear or vane pumps even with comparable displacements, but they tend to be more expensive in terms of the initial cost. They are also more sensitive to contamination, but following strict hydraulic cleanliness guidelines and filtering any hydraulic fluid added to the system can address most contamination issues.

In an axial piston pump, sometimes called an inline axial pump, the pistons are aligned with the axis of the pump and arranged within a circular cylinder block. On one side of the cylinder block are the inlet and outlet ports, while an angled swashplate lies on the other side. As the cylinder block rotates, the pistons move in and out of the cylinder block, thus creating alternating suction and discharge of hydraulic fluid.

Axial piston pumps are ideal for high-pressure, high-volume applications and can often be found powering mission-critical hydraulic systems such as those of jet aircraft.

In a bent-axis piston pump (which many consider a subtype of the axial piston pump), the pump is made up of two sides that meet at an angle. On one side, the drive shaft turns the cylinder block that contains the pistons which match up to bores on the other side of the pump. As the cylinder block rotates, the distances between the pistons and the valving surface vary, thus achieving the necessary suction and discharge.

In a radial piston pump, the pistons lie perpendicular to the axis of the pump and are arranged radially like spokes on a wheel around an eccentrically placed cam. When the drive shaft rotates, the cam moves and pushes the spring-loaded pistons inward as it passes them. Each of these pistons has its own inlet and outlet ports that lead to a chamber. Within this chamber are valves that control the release and intake of hydraulic fluid.

In a fixed displacement pump, the amount of fluid discharged in each reciprocation is the same volume. However, in a variable displacement pump, a change to the angle of the adjustable swashplate can increase or reduce the volume of fluid discharged. This design allows you to vary system speed without having to change engine speed.

When the input shaft of a vane pump rotates, rigid vanes mounted on an eccentric rotor pick up hydraulic fluid and transport it to the outlet of the pump. The area between the vanes increases on the inlet side as hydraulic fluid is drawn inside the pump and decreases on the outlet side to expel the hydraulic fluid through the output port. Vane pumps can be either fixed or variable displacement, as discussed for piston pumps.

Vane pumps are used in utility vehicles (such as those with aerial ladders or buckets) but are not as common today, having been replaced by gear pumps. This does not mean, however, that they are not still in use. They are not designed to handle high pressures but they can generate a good vacuum and even run dry for short periods of time.

There are other key aspects to choosing the right hydraulic pump that goes beyond deciding what type is best adapted to your application. These pump characteristics include the following:

Selecting a pump can be very challenging, but a good place to start is looking at the type of pump that you need. Vane pumps have been largely replaced by compact, durable gear pumps, with external gear pumps working best for high pressure and operating speeds while internal gear pumps are able to generate flow with very little pulsation. However, vane pumps are still good for creating an effective vacuum and can run even when dry for short periods of time. Piston pumps in general are more powerful but, at the same time, more susceptible to contamination.

Whether the pump is needed for the rugged world of mining, the sterile world of food and beverage processing, or the mission-critical aerospace industry, MAC Hydraulics can assist you with selecting, installing, maintaining, and repairing the right pump to meet the needs of your hydraulic system. In the event of a breakdown, our highly skilled technicians can troubleshoot and repair your pump — no matter who the manufacturer happens to be. We also offer on-site services that include common repairs, preventative maintenance, lubrication, cleaning, pressure testing, and setting.

The type of pump you choose for your power unit affects the nature of the HPU build. Pump choice boils down to cost, complexity and performance. There are three major types of pumps: the gear pump, the vane pump and the piston pump. There are other, less common pumps, but we’ll stick to these three for this discussion.

Gear pumps are economical, but on the low end of the efficiency range. They’re reliable and durable, but efficiency tends to drop over time. Remember, a pump’s job is to convert incoming mechanical energy into hydraulic energy, and the more efficiently it does so not only allows you to choose a smaller motor, but more efficiency saves you money over time. Traditional spur gear pumps average about 80% efficiency, meaning your 10 input horsepower will net you 8 hydraulic horsepower.

Vane pumps reside in the middle ground between gear and piston pumps. They’re more efficient than gear pumps, but less so than piston pumps. Vane pumps are quiet, making them popular for industrial applications. They’re also available with myriad control options, such as pressure compensation, load sensing and displacement control. Vane pumps typically cannot handle high-pressure circuits, however.

Piston pumps take up the premium end of the range. They’re capable of very high pressure, and have nearly infinite methods of control, including pressure compensation, load sensing, servo control, horsepower control, etc. They’re also very efficient; some designs are capable of 95% efficiency, allowing you to get the most from your prime mover. Their downside is cost, both for initial investment, and for service and repair.