We will show you a pressure control valve characterized by fast response with a direct acting piston and hunting-free motion.

Kosaka Laboratory Ltd.

Pressure Control Valve

Hydraulic Equipment / Pressure Control Valve

Piston type primary pressure control valve VP-1 is installed to keep pressure constant in a piping system with a given discharge rate, such as a heavy oil burning system, and developed to replace conventional diaphragm or bellows type primary pressure control valves.

This pressure control valve, which uses a piston at the receiver for detected pressure, has no risk of the pressure receiver being damaged and many excellent features including stable action, fast response, secondary pressure compensation and high accuracy of pressure control.

In addition, low pressure (0.1 to 0.5 MPa)-use primary pressure control valves installed for lubricant pumps are to be manufactured.


Nominal diameter 15 20 25 32 40 50
Relief flow rate
Minimum to maximum[L/h]
100-1000 100-2000 100-3500 200-7000 200-9000 400-14000
Cv value (reference) 0.3-0.4 0.5-0.9 0.9-1.5 1.8-3.0 2.3-3.9 3.6-6.0
Adjustment range of set pressure 0.5-2.3 MPa
Tolerance of pressure variation Within +/- 0.03 MPa
Flange rating JIS B 2210 20K
Detected pressure connector Copper-brazed steel tube: outer diameter: 10 mm,
length: 1.5 m or greater