Yuken A37 Solenoid Two-Pressure Variable Pump

The Yuken A37-F-R-02-S-K-D24-32 is a premium swashplate-type variable displacement axial piston pump from Yuken’s highly regarded “A” Series. Unlike standard pressure-compensated pumps, this specific model features a Solenoid Two-Pressure Control (Type 02). Equipped with an integrated 24V DC directional solenoid valve, it allows the hydraulic system to seamlessly switch between two different preset load pressures while keeping the actuator speed nearly constant. It is the ultimate energy-saving solution for machinery that requires long unloading times or dual-pressure work cycles.

Key Features:

Series: Yuken A Series (Cast Iron Body)
Displacement: 36.9 cm³/rev
Control Type: “02” Solenoid Two-Pressure Control
Solenoid Voltage: 24V DC (D24)
Design Feature: Low noise, drastic reduction in heat generation during unloading.

Product Overview Built on the robust and quiet Yuken A Series platform, the A37 Solenoid Two-Pressure Variable Pump takes energy efficiency a step further. It combines the mechanical reliability of a cast-iron variable piston pump with the precise logic of an integrated electro-hydraulic control valve.

How the “02” Solenoid Two-Pressure Control Works: This unique control mechanism is ideal for applications where the output power of the actuator needs to be managed at two different pressure levels.

Solenoid ON (Work Cycle): The pump delivers fluid up to the high-pressure setting (e.g., during the pressing or clamping phase).
Solenoid OFF (Unloading/Standby): The pump instantly shifts to a low-pressure standby mode. The flow is reduced to the absolute minimum necessary to maintain the low pressure, preventing the oil from overheating and drastically cutting energy consumption during idle phases.

Why Choose this Specific Yuken A37 Model?

Reduced Heat Generation: By effectively unloading the pump electrically during non-working cycles, it eliminates the need for massive cooling systems.
Simplified Plumbing: Because the dual-pressure logic and the directional solenoid are built directly onto the pump compensator, you save money and space on external manifold blocks and relief valves.
Low Noise: Yuken’s optimized port plates ensure that even during the high-pressure switch, the acoustic emissions remain incredibly low.

Common Applications:

Hydraulic Presses: Where rapid advance is followed by a high-pressure pressing cycle.
Machine Tools: CNC machining centers that require long periods of standby (unloading) while parts are being loaded or inspected.
Automated Clamping Systems: Systems requiring high pressure to clamp, but low pressure during holding phases.

Specification	Value / Description
Product Type	Variable Displacement Axial Piston Pump
Series	A Series (Standard Cast Iron)
Displacement ( $V_{g max}$ )	36.9 cm³/rev (Size 37)
Max. Operating Pressure	Up to 21 MPa (210 bar / 3050 psi)
Control Type	Solenoid Two-Pressure Control
Solenoid Voltage	24 Volts DC
Shaft Speed Range	600 to 1800 r/min
Model Breakdown	A 37 – F R – 02 – S – K – D24 – 32
– A	Yuken A Series Variable Pump
– 37	Displacement: 36.9 cm³/rev
– F	Mounting: Flange Mounting
– R	Rotation: Right / Clockwise
– 02	Control Type: Solenoid Two-Pressure Control
– S	Piping/Porting configuration (typically Side porting)
– K	Shaft type: Keyed Shaft
– D24	Solenoid Coil Voltage: 24V DC (Direct Current)
– 32	Design standard number