For use on clamp and drill circuits where pressure is to be maintained regardless of back pressure drop in the system.

The valve adjustable spring-loaded as direct-acting relief valve at valve setting by pressure on port 1 allowing relief flow toport 2.

When oil flows from port 2 to port 1 ,the release pressure is low. 

When port 3 directly flows to tank.

Back pressure on port 2 without adds to the valve setting.

Rated Flow :

30 l/min 

Max. pressure :

350 bar

Leakage :

0.3 ml/min

Working temperature : 

Min. -20℃ , Max. 90℃ , with standard BUNAN gaskets

Min. -20℃ , Max. 120℃ , with optional VITON gaskets on request

Fluid :

best use mineral oil with viscosity ranging between 10 and 200 cSt

Filter :

25 micron or better

Cavities :

see cavity data ST11A

Installation :

before screwing the cartridge on the valve body, ascertain to provide suitable gasket lubrication with clean oil and also be sure to screw the cartridge manually in to reach against the gaskets in the valve body.

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