It is used when you want to regulate the oil flow in one direction and have the full flow in the opposite direction, the valve is not compensated consequently the regulation will depend on the operating pressure, the viscosity and the temperature of the fluid.
The range includes various threads starting from 1/4 BSPP (1/4 G) up to 1 BSPP (1 G).
The external body is made of high-strength steel and protected externally from oxidation with a zinc plating treatment. It is possible to request a zinc/nickel surface treatment to increase resistance to oxidation, for example in cases where the valve is poorly protected and exposed to atmospheric agents.
VSUA are interchangeable with:
