Xuzhou Sunwell Power Transmission Machinery Co.,Ltd.

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42 & 4T Series Piston Pump

Series 42 axial piston pumps/Integrated Tandem Pumps (4T) are advanced hydrostatic units for medium power applications with maximum loads of 415 Bar [6020 psi] (41 cm3) and 350 Bar [5075 psi] (51 cm3).  You can combine these pumps with a suitable Sauer-Danfoss motor or other products in a system to transfer and control hydraulic power.
The Series 42 variable displacement pump /4T axial piston pump is a compact, high power density unit, using the parallel axial piston/slipper concept in conjunction with tiltable swashplates to vary the pumps’ displacements. Reversing the angle of the swashplate reverses the flow of fluid from the pump, and reversing the direction of rotation of the motor output.  4T axial piston pumps provide an infinitely variable speed range between zero and maximum in both forward and reverse.
4T axial piston pumps use a cradle swashplate design with a hydraulic servo control cylinder.  Control is provided through a compact servo control system.  Two types of servo controls are available.  These include mechanical hydraulic actuated feedback controls, and hydraulic proportional control.  These controls feature low hysteresis and responsive performance.
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42 & 4T Series Piston Pump
Case pressure  
Continuous pressure bar [psi] 3.4 [50]
Maximum pressure (cold start) bar [psi] 10.3 [150]
Pressure limits  
Displacement cm3/rev 41 51
Rated pressure bar [psi] 350 [5075] 325 [4713]
Maximum pressure bar [psi] 415 [6017] 350 [5075]
Speed limits  
Displacement cm3/rev 41 51
Minimum speed  min-1 (rpm) 500  
Rated speed at maximum displacement  min-1 (rpm) 3200 2900
Maximum speed at maximum displacement min-1 (rpm) 3450 3400
Charge pump displacement and setting pressure  
Charge pump 41 51
Internal cm3/rev [in3/rev] none none
Charge relief valve
settings bar [psi]
Standard 20 [290]  
Optional 14-24 [203-340]  
Theoretical flow  
Displacement cm3/rev 41 51
Theoretical flow at rated speed l/min [US gal/min] 131 [34.6] 148 [39.1]
     
Check / high pressure relief valve  
Options    No relief valve / check only Relief valve / check
 
Settings bar [psi]   210-415 [3045-6020]
or by setting available: 210, 250, 280, 300, 325, 345, 360, 385, 415