Hydraulic Piston Pump

The Premier Series pumps have been designed to operate on a variety of fluid types and in a wide range of industries where variable flow, high pressure and/or high speeds are required; Such as: presses, construction machinery,injection molding, wood, aircraft,drilling, mining, steel and cranes
Two stage, pilot operated compensator provides sharp pressure cutoff at compensa-tor setting, typically regulating pressure within 50 PSI (3.5 BAR).
Compensator may easily be remotely controlled or used in load-sensing circuits.

Features:
Compact overall package size
Quiet operation
Low flow ripple to further reduce noise
Elastomer seals that eliminate gaskets and external leakage
High operating efficiency for lower power consumption and reduced heat generation
Simple hydraulic controls with “no-leak” adjustments
SAE and ISO standard mounting flanges and ports
Long life, tapered-roller shaft bearings
Long life, low friction, hydrostatically balanced cam bearings
Full power through-drive capability
End or side inlet and outlet ports
Case drain ports for horizontal or vertical, shaft-up mounting
Optional minimum and maximum displacement adjustments
Optional case-to-inlet check valve to extend shaft seal life
Easy to service

Variable displacement, axial piston pump for open-circuit applications
Medium pressure, continuous operation at pressures up to 4060 PSI (280 BAR)
Compact, quiet and efficient control
Wide temperature range suitable for mobile applications

For low pressure applications such as in tractors or for fan drives
Size 28 … 85
Nominal pressure 3050 psi
Maximum pressure 3600 psi
Open circuit

Size A10VNO28 A10VNO45 A10VNO63 A10VNO85 Nominal pressure 210 barPeak pressure 250 barOpen circuit Features - Axial piston variable pump in swashplate design for hydrostatic drives in open circuits - Flow is proportional to drive speed and displacement. it canbe infinitely varied by adjustment of the swashplate. - High power to weight ratio-small dimensions - Low noise level - Permissible continuous pressure 210 bar - Axial and radial loading of drive shaft possible - Pressure and flow control Short response times Well proven A10-technology Extreme small mounting dimensions Cost effective alternative to fixed displacement pumps Costs optimized design

Bosch-bomba variable de pistón Axial REXROTH A15VO A15VLO, Serie 12, A15VO110, A15VO145, A15VO175, A15VO210, A15VO280
Sizes:A15VSO110 A15VSO145 A15VSO175 A15VSO210 A15VSO280 A15VLO110 A15VLO145 A15VLO175 A15VLO210 A15VLO280 
● Nominal pressure 350bar 
● Maximum pressure 420bar 
● Open circuit Features 
● Variable pump with axial piston rotary group in swashplate design for hydrostatic drives in open circuit. 
● For use particularly in industrial application areas 
● Flow is proportional to the drive speed and displacement. 
● Flow can be infi nitely varied by controlling the swashplate angle. 
● The pump can work either self-priming or with a charge pump. 
● Special control device program for industrial applications, with diff erent control and regulation functions. 
● The universal through drive is suitable for adding gear wheel pumps and axial piston pumps of up to the same size, i.e. 100% through drive. 
● Compact design
● High effi ciency 
● High power density
● Low noise level

Verstellpumpe A11VO/A11VLO Variable Hydraulic piston Pump
The Bosch Rexroth A11VO pump is a variable displacement axial piston pump. It has a swashplate design for open circuit hydrostatic drives and is designed primarily for use in mobile applications.The pump is available in the following sizes: 40 | 60 | 75 | 95 | 130 | 145 | 190 | 260 cc/rev and has a nominal pressure of 350 bar and a peak pressure of 400 bar.Flow is proportional to the drive speed and displacement. By adjusting the swash plate, the flow can be changed seamlessly.Other features of the Bosch Rexroth A11VO pump include:All-purpose high pressure pump with through-driveThrough-drive for mounting of further pumps up to same nominal sizeOptional charge pump for sizes 130cc/rev to 260 cc/revPump operates under self-priming conditions, with tank pressurisation, or with an optional built-in charge pump (impeller, A11VLO)Comprehensive range of control options is available matching any application requirementPower control option is externally adjustable, even when the pump is running

Features:
● Variable double pump with two axial tapered piston rotary groups of bent-axis design for hydrostatic drives in open circuits
● The flow is proportional to the input speed and to the displacement, and is infinitely variable from qV max to qV min = 0
● The pump is suitable for direct mounting on the flywheel case in diesel engines
● One common suction port for auxiliary pump and both circuits – A wide range of control instruments is available for different control and regulating functions
● Individual power controller
● Integrated auxiliary pump with pressure-relief valve, optionally with additional pressure-reduction valve
● Power take-off for mounting axial piston and gear pumps
● Excellent power to weight ratio
● Long service life

All sizes of the hydraulic pump A4VTG at a glance:
A4VTG 71
A4VTG 90

The different control devices of the hydraulic pump A4VTG at a glance:
Proportional control
HW1 = hydraulic, mechanical servo, hexagon shaft with lever to the rear
EP3 = electric, U = 12 V DC with emergency actuation and spring return
EP4 = electric, U = 24 V DC with emergency actuation and spring return

Hydrostatic closed circuit transmissions benefit from the A10VG's infinitely variable drive speed and displacement proportions.

Variable axial piston pump of swash plate design for hydrostatic closed circuit transmission

Flow is proportional to drive speed and displacement and is infinitely variable

Output flow increases with the swivel angle of the swash plate from 0 to its maximum value

Flow direction changes smoothly when the swash plate is moved through the neutral position

A wide range of highly adaptable control devices is available for different control and regulating functions

The pump is equipped with two pressure-relief valves on the high pressure ports to protect the hydrostatic transmission (pump and motor) from overload

The high-pressure relief valves also function as boost valves – The integrated boost pump acts as a feed and control oil pump

The maximum boost pressure is limited by a built-in boost pressure relief valve

Rexroth Axial Piston Variable Pump A4VG Description
Axial piston variable pump A4VG series 32
● High pressure pump for applications in closed circuits
A4VG28 A4VG45 A4VG50 A4VG56 A4VG71 A4VG125 A4VG180 A4VG250 A4VG 28 NVD**/32R, A4VG 40 HD3D**/32R, A4VG 56 HWD**/32R,  A4VG 71 DA1D**/32R, A4VG 90 EZ1D**/32R, A4VG 125 EP4D**/32R.
● Nominal pressure 400 bar
● Maximum pressure 450 bar
Integrated boost pump for boost and pilot oil supply
Flow direction changes smoothly when the swashplate is moved through the neutral position
High-pressure relief valves with integrated boost function
With adjustable pressure cut-off as standard
Boost-pressure relief valve
Through drive for mounting of further pumps up to same nominal size
Large variety of controls
Swashplate design

A7VO28 A7VO55 A7VO80 A7VO107 V160 A7VO250 A7VO350 A7VO500
Robust high pressure pump for universal use
Size 28 … 500
Nominal pressure 350 bar
Maximum pressure 400 bar
Open circuit
● Robust pump with long service life
● Hyperbolic power controller
● Large variety of controls
● Well-tried rotary group technology
● High total efficiency
● Optional high-speed version for nominal size 250
● Optional with long-life bearings for the nominal sizes 250 to 500
● Bent-axis design

Series 10, 11 and 30
Size 40...1000
Nominal pressure 350 bar
Peak pressure 400 bar
Open circuit

For machines with medium pressure requirements
A10VSO18 A10VSO28 A10VSO45 A10VSO71 A10VSO100 A10VSO140 A10VSO180 
Nominal pressure 250 bar
Maximum pressure 315 bar

Open circuit
● Through drive for mounting of further pumps up to same nominal size
● Approved for high speeds
● Low operating noise
● Controls with short response times
● Large variety of controls
● High power density
● Swashplate design