parker hydraulic pump pressure adjustment in stock

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The full range of P1/PD pump units and corresponding repair and conversion spare parts are in stock and available for purchase via ETS’ Memphis facility. Additionally ETS offers control, porting and through-drive conversions of in-stock units to meet urgent customer requirements.

Northern Hydraulics has been in business since 1963 and offers the finest original and custom components as well as expert repair of hydraulic components and systems. In the Great Falls, MT area we provide all your hydraulic repair needs on equipment such as hydraulic pumps, motors, valves, or cylinders.

We are located in the heart of Montana serving the states Big Sky Hydraulic needs, just on the northern edge of Great Falls, MT. In business since 1963, we have been in this location for the past 12 years. Our facilities offer the finest in machine and repair of hydraulic components and systems. We are your source for all of your hydraulic repair needs in Great Falls, MT!

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.

Gerotor Motors have a compact design, reliable holding capability and allows easy installation for the demanding agriculture and turf market. Other benefits include high starting torque and low speed capability while high pressure shaft seals withstand full system pressure. Roller vanes and sealed commutation offer high volume effectiveness and smooth low speed operation while heavy duty bearings permit ample outer axial and radial shaft loads.

Vane Motors designs offer longer life in severe duty applications requiring high pressures up to 230 bars, high speeds up to 4000 RPM and low fluid lubricity. High starting torque efficiency allows motors to start under high load without pressure overshoots, jerks and high prompt horsepower loads. When operating at very low speeds on swing and load hoist drives, vane motors display a very low torque ripple. Vane motor applications include hoist winch drives, swing drives, and propulsion drives.

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.

Options include feedback transducers, position switches, integral cushions, oversize ports, stop tubes, stroke limiters, gland drains, rod end protection and more while they have working pressure up to 70 bars and single/double rod designs offered and have five seal types to suit a wide range of fluid specifications.

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.

Variable-displacement pumps are used in hydraulic systems where the flow requirements vary. This usually means the system has several actuators and, depending on the current cycle of the machine, the number of actuators moving at a given time will fluctuate. The most common type of variable-displacement pump is the pressure-compensating pump.

Pressure-compensating pumps are designed to deliver only the amount of flow required by the system to maximize efficiency and avoid heat generation. The compensator is adjusted to a pressure somewhat higher than that required to move the system’s heaviest load.

A pressure-compensating pump will deliver its maximum flow until the system pressure reaches the compensator setting. Once the compensator setting is reached, the pump will be de-stroked to deliver only the amount of flow that will maintain the compensator setting in the line.

Whenever more flow is demanded by the system (such as would occur when an additional actuator begins to move), the pump will increase its stroke to meet the new flow demand. Whenever the system flow needs to decrease (such as when one or more actuators are stopped), the pump stroke is reduced.

When the system is stopped completely, the pump stroke is reduced almost to zero. It will stroke only a very small amount or whatever is required to maintain the compensator setting in the line, overcoming any system bypassing or leaks. While a pressure-compensating pump is efficient, the standby pressure remains high.

Adjusting a pressure-compensating pump is quite simple. With all flow blocked and the system idle, the compensator valve is adjusted to the desired pressure. However, some pressure-compensating pumps have two valves mounted on the pump body.

The two adjustments can look nearly identical. This type of pressure-compensating pump is called a load-sensing pump. The second adjustment is called either a “load-sensing” valve or “flow-compensator” valve.

A load-sensing pump is designed to reduce its pressure to a much lower standby level whenever the system is idle. This can conserve energy and reduce heat and wear in systems that spend a significant amount of time in an idle condition.

The two separate pressure adjustments allow setting the compensator valve to the required maximum system pressure and the load-sensing adjustment to a much lower standby pressure.

Whenever the system is moving a load, the high-pressure adjustment limits the system pressure. For instance, as a cylinder is extended, pressure in the system will build as necessary to move the load. Eventually, the cylinder reaches the end of its stroke, and flow is blocked.

When the flow is blocked in this fashion, the system pressure can build no higher than the setting of the compensator, but until another load is to be moved, there is no need for the system pressure to be kept so high.

Most load-sensing systems have a pump-loading directional-control valve of some sort that can place the system in an idle condition until it is necessary to move another load. When the pump-loading valve is shifted, the system pressure drops to the much lower load-sensing valve setting.

A load-sensing valve usually is smaller than the compensator valve and typically mounted directly on top of the compensator. The compensator valve is closer to the pump. The load-sensing valve is factory preset and normally does not need to be adjusted during the initial pump setup. In most pumps, the factory preset is approximately 200-300 pounds per square inch (psi).

The most common reason to adjust a load-sensing valve is because someone unfamiliar with the pump has mistakenly attempted to set the maximum system pressure by adjusting the load-sensing valve instead of the compensator. This not only can result in unstable system pressure but in some cases can also void any warranty on the pump.

A typical configuration of a pressure-compensating pump is shown in Figure 1. A pump-loading valve is used to determine whether the system is idle or prepared to move a load. The pump-loading valve is de-energized whenever the system is idle.

Pilot pressure on the left-hand side of the load-sensing valve is then released to the tank. The pilot line on the right-hand side of the load-sensing valve is connected to the pressure line at the pump outlet. System pressure shifts the load-sensing valve and directs pressure to reduce the pump stroke so that system pressure drops to the load-sensing setting of 300 psi, as illustrated in Figure 2.

When a load is to be moved, the pump-loading valve is energized. This directs pilot pressure to the left side of the load-sensing valve, keeping it from shifting. System pressure shifts the compensator valve to de-stroke the pump exactly the amount necessary to limit system pressure to the compensator setting, 3,000 psi as shown in Figure 3.

To make the pressure settings, always adjust the load-sensing valve first. The pump should be deadheaded by closing the manual hand valve. With the pump-loading valve de-energized, pressure will build only to the current setting of the load-sensing valve. Adjust the load-sensing valve to the desired pressure.

Once the load-sensing valve is set, energize the pump-loading valve. System pressure will then build to the current compensator setting. Adjust the compensator to the desired setting. Open the manual valve, and the system can be placed back into service.

There are several variations of this design. Sometimes a throttle valve will be used to determine if a load is available. The pressure drop that results when oil moves through the throttle valve signals the need for higher system pressure.

Another common variation is to use the load-sensing valve in conjunction with a proportional relief valve connected in series. Standby pressure will then be determined by the sum of the load-sensing pressure and the electronically controlled setting of the proportional relief.

In more complex arrangements such as this, hand valves should be installed that can be opened or closed to deadhead the load-sensing valve and also to release its pressure to the tank to enable setting the pressure.

Jack Weeks is a hydraulic instructor and consultant for GPM Hydraulic Consulting. Since 1997 he has trained thousands of electricians and mechanics in hydraulic troubleshooting methods. Jack has...

In the parts tables below you may select the hydraulic parts you need. All PVplus parts we sell are genuine Parker Hannifin and originate in Germany. We highly recommend to use genuine OEM parts only to ensure smooth operation and longer service life.

The Parker PVplus hydraulic pumps are produced in Chemnitz, Germany and manufactured by Parker Hannifin Manufacturing Germany GmbH & Co. KG. The PV046R1K1T1NFDV is an axial piston pump of variable displacement with a maximum displacement volume of 46.0 ml/rev. The mounting interface is according to metric (ISO 3019-2) and the pump control group is electrohydraulic control. Further details are listed in the Parker PV046 Datasheet and pump control options.

All pump repair kits listed on this page are for Parker PVplus axial piston pumps of latest design series. Current design of Parker PVplus PV046 is 46 Design (hydraulic pump) and 45 Design (pump controller). The item numbers listed in these tables refer to the PV046 exploded view drawing of the Parker PV046 Spare Sparts List PVplus Design 46. Should you require spare parts for an older design PVplus pump, please contact us for further information (do not forget to include pump name plate information).

Be sure to operate the hydraulic pump under optimum oil viscosity (not too low) since a thinner lubrication film causes more direct metal to metal contact resulting in increased wear in glide and roller bearings. The PVplus bearing kit contains both the front and rear roller bearing of the drive shaft and are also included in the pump shaft repair kit. The PVplus trunnion bearing unit contains the two glide bearings of the pump swash plate (trunnion bearings are not included in swash plate kit).

Parker’s CFQ Adjustable Flow Divider divides pump hydraulic oil into two separate flows. One, the pressure compensated controlled flow, and the other, a usable flow which is in excess of the controlled flow. Once the controlled flow demand is satisfied, the compensator spool shifts and passes excess flow to port EX. The EX flow can be used in a secondary circuit. Additionally, with the EX port plugged, the CFQ can serve as a 2-port restrictive type pressure compensated flow control.

Parker PAVC Medium Pressure/Super Charged Pumps provide reliable high-speed operation. With a pressure rating of 3,000 psi, they are ideal for a variety of medium pressure mobile and industrial applications.

Featuring a flexible, compact design, PAVC Medium Pressure/Super Charged Pumps deliver a reliable, easy-to-use solution for a wide range of open-circuit applications requiring medium pressure variable displacement. PAVC pumps utilize a built-in supercharger to ensure a high speed capability, while convenient cartridge-style controls increase serviceability.

If you are looking for Parker PAVC pumps, it is good idea to check our website then contact with us! HEASH TECH supply Parker PAVC33, PAVC38, PAVC65, PAVC100 series. Some of them are stock, which is better for yous. PAVC38BR4216, PAVC382R416, PAVC38R42M16, PAVC38B2L416, PAVC389B2R4A16, PAVC65R4213, PAVC10038R4222, PAVC100R4222, PAVC100BR4M22, PAVC10038R42AP, PAVC100B3L4222.

Hydraulic pumps are an incredibly important component within hydraulic systems. IFP Automation offers a variety of pump and hydraulic system products that deliver exceptional functionality and durability. Our partner Parker’s extensive line of hydraulic pumps deliver ideal performance in even the most demanding industrial and mobile applications. In this post, we are going to spend time discussing pressure compensated and load sensing hydraulic pumps.

Do to the surface area of the servo piston and the pressure exerted on that area, a force is generated that pushes the swash plate of the pump to a lower degree of stroke angle.

The pump tries to maintain compensator setting pressure, and will provide whatever flow (up to it’s maximum flow rate) that is necessary to reach that pressure setting.

For more information on how you can make use of hydraulic pump technology in your applications, please contact us here to receive a personalized contact by an IFP Application Engineer: