"A3H" Series Variable Displacement Piston Pumps Spool Pressure Compensator Valve Pressure Adj. Screw Control Piston Drain Port Port Plate Cylinder Block Slipper Retainer Spring Control Type Piston Ass'y Features High performance at maximum pressure 35MPa Volumetric efficiency is over 95% and overall efficiency is more than 90% at 1800 r/min. "A3H37" type performance charateristics 100 N=1800 r/min Volumetric Efficiency Overall Efficiency Output Flow Output Flow Output Flow "09" Constant Power Control Type Compact size A3H series are compact in size because output / mass ratio is large. "01" Pressure Compensator Type Input Power Output Flow Output Flow "14" Load Sensing Type "A3H" Series Variable Displacement Piston Pumps

PISTON PUMPS Control Type Pressure Compensator Type Performance Characteristics When the system pressure increases and comes close to the preset cut-off pressure, the pump flow decreases automatically while maintaining the set pressure as it is. This type of control can control the pump input power according to the motor output. When the system pressure increases, the pump swash plate tilt angle (output flow) decreases, in correspondence to predetermined shaft input values. Output Flow Constant Power "09" (Torque) Control Type Graphic Symbols Output Flow Control Type This type of control can...

"A3H" Series Variable Displacement Piston Pumps-Single Pump, Pressure Compensator Type Graphic Symbol Model Numbers Geometric Displacement cm3/rev (cu.in./rev) Minimum Adj. Flow cm3/rev (cu.in./rev) Operating Pressure MPa (PSI) Rated Shaft Speed Range r/min Max. 1. Consult Yuken when pump is used over rated pressure because there is a restriction on operating condition. 2. The maximum shaft speeds shown in the above table are at suction pressure 0 kPa (0 PSIG). 3. The table above shows specifications for using petroleum based oils. Pumps (customized design) for special fluids are also available....

PISTON PUMPS Model Number Designation Series Number Control Type Shaft Extension Design Design Std. Number Viewed from Shaft End K : Keyed Shaft 44.45mm (1.75 IN.) Dia. K1: Keyed Shaft 5 50.8mm (2.0 IN.) Dia. Pipe Flange Kits Pipe flange kits are available. When ordering, specify the kit number from the table below. Threaded Connection Pump Model Numbers N. Ameraican Design Standard Socket Welding Butt Welding 2 2 Japanese N. Ameraican Japanese N. Ameraican Std. "JIS" & Std. "JIS" & Design Design European European Standard Standard Design Std. Design Std. F5-08-B-10 1. These flanges are with...

Response Characteristics Change in Accordance with Circuits and Operating Conditions. Test Circuit and Conditions Size of High Pressure Rubber House High Pressure Rubber Housea High Pressure Rubber Hose Conditions Drive Speed: 1500 r/min Hydraulic Fluid: ISO VG32 Oil Oil Temperature: 40 °C (104 °F) [Viscosity 32 mm2/s (150 SSU)] "A3H" Series Variable Displacement Piston Pumps Single Pump, Pressure Compensator Type

PISTON PUMPS Typical Performance Characteristics of Type "A3H16" at Viscosity 32 mm2/s (150 SSU) [ISO VG32 oils, 40°C (104°F)] Performance Characteristic Curve Input Power Input Power Input Power Overall Efficiency 80 Output Flow Output Flow Output Flow Input Power Output Flow Input Power Output Flow Input Power Note) The dotted line in the graph indicates less than minimum adjustable flow. Full Cut-off Power Full Cut-off Power 3600 r/min 1800 r/min 1500 r/min 3600 r/min 1800 r/min 1500 r/min Noise Level [One metre (3.3 ft.) horizontally away from pump head cover] dB(A) 80 Full Flow Full Cut-off...

Typical Performance Characteristics of Type "A3H37" at Viscosity 32 mm2/s (150 SSU) [ISO VG32 oils, 40°C (104°F)] Performance Characteristic Curve Input Power Input Power Output Flow Output Flow Input Power Volumetric Efficiency Input Power Output Flow Output Flow Output Flow Note) The dotted line in the graph indicates less than minimum adjustable flow. Full Cut-off Power Full Cut-off Power 2700 r/min 1800 r/min 1500 r/min 2700 r/min 1800 r/min 1500 r/min Noise Level [One metre (3.3 ft.) horizontally away from pump head cover] N=2500 r/min Full Flow Full Flow Full Flow Noise Level Noise Level...

PISTON PUMPS Typical Performance Characteristics of Type "A3H56" at Viscosity 32 mm2/s (150 SSU) [ISO VG32 oils, 40°C (104°F)] Performance Characteristic Curve Input Power Input Power Input Power Output Flow Input Power Overall Efficiency Output Flow Input Power Output Flow Output Flow Output Flow Overall Efficiency Input Power Overall Efficiency Output Flow Input Power Note) The dotted line in the graph indicates less than minimum adjustable flow. 2500 r/min 1800 r/min 1500 r/min Full Cut-off Power Full Cut-off Power Noise Level [One metre (3.3 ft.) horizontally away from pump head cover] dB(A)...

Typical Performance Characteristics of Type "A3H71" at Viscosity 32 mm2/s (150 SSU) [ISO VG32 oils, 40°C (104°F)] Performance Characteristic Curve Output Flow Input Power Input Power Output Flow Input Power Output Flow Volumetric Efficiency Input Power Output Flow Input Power Output Flow Input Power Note) The dotted line in the graph indicates less than minimum adjustable flow. Full Cut-off Power Drain L/min U.S.GPM 14 3.6 Full Cut-off Power 2300 r/min 1800 r/min 1500 r/min 2300 r/min 1800 r/min 1500 r/min 2300 r/min 1800 r/min 1500 r/min Noise Level [One metre (3.3 ft.) horizontally away from...

PISTON PUMPS Typical Performance Characteristics of Type "A3H100" at Viscosity 32 mm2/s (150 SSU) [ISO VG32 oils, 40°C (104°F)] Performance Characteristic Curve Input Power Input Power Output Flow Output Flow Output Flow Input Power Input Power Output Flow Input Power Output Flow Volumetric Efficiency Overall Efficiency L/min Volumetric Efficiency Output Flow Note) The dotted line in the graph indicates less than minimum adjustable flow. Full Cut-off Power 2100 r/min 1800 r/min 1500 r/min Full Cut-off Power 2100 r/min 1800 r/min 1500 r/min Noise Level [One metre (3.3 ft.) horizontally away from...