PARKER Variable Vane Pump PVS40EH140C2 PVS25EH140C2

Detailed technical parameters and characteristics
1. Displacement and flow rate
Theoretical displacement: 40.0 cm ³/rev (2.44 in ³/rev)
Rated speed: usually 1200 rpm or 1800 rpm (depending on the driving motor, refer to specific operating conditions)
Output flow rate: Flow rate=displacement x speed.
At 1200 rpm, the theoretical flow rate is approximately 40 cm ³/rev x 1200 rpm=48000 cm ³/min=48 L/min
At 1800 rpm, the theoretical flow rate is approximately 40 cm ³/rev x 1800 rpm=72000 cm ³/min=72 L/min
Note: Actual flow may be slightly lower due to volumetric efficiency (approximately 90-95%).
2. Pressure range
Rated pressure: 140 bar (2000 psi) - This is the maximum pressure at which the pump can operate continuously.
Peak pressure: 170 bar (2500 psi) - the highest pressure that can be sustained in a short period of time.
3. Control mode: H-type - pressure compensation
This is the core feature of this model.
Working principle: There is a pressure compensation valve (adjustable spring) inside the pump. When the system pressure reaches the preset compensation pressure setting value, the pump will automatically reduce its displacement (decrease the angle of the inclined plate) and only output a small flow rate required to maintain that pressure.
Benefits:
Energy saving: During the pressure holding stage, the motor load is extremely low, saving energy and reducing heat generation.
Reduce heat: Avoiding the huge heat generated by full flow overflow under high pressure.
Simplify the system: No need to install complex unloading valves externally.
4. Structure and Interface
Installation flange: SAE 2-Bolt, which is a very common installation standard.
Shaft extension: Extended Splined shaft, suitable for direct connection with specific drives such as motors.
Oil port: usually located on the back cover or side cover of the pump, with dimensions of standard SAE straight thread (such as SAE 12), specific dimensions need to refer to the drawing.
Rotation direction: bidirectional rotation, but usually defaults to clockwise when viewed from the shaft end.
5. Main features
High efficiency: Optimized hydraulic balance design, high volumetric efficiency and overall efficiency.
Low noise: The inherent smoothness of blade pumps results in lower noise levels compared to gear pumps of the same specifications.
Long lifespan: Made of wear-resistant materials and high-precision manufacturing processes, the bearing has a long lifespan.
Easy maintenance: The cartridge style design makes it easy to replace and maintain on site without disassembling the entire pump body.
Rich control options: The PVS series offers multiple control methods, such as pressure compensation, load sensing, constant power, etc. Among them, the PVS40EH140C2 is the most commonly used pressure compensation type.

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