They are used when it is necessary to regulate the oil flow in both directions, they are not pressure compensated and consequently the regulation will depend on the operating pressure, the viscosity of the fluid and the operating temperature.
They are built in various sizes with threads starting from 1/4 BSPP (1/4 G) up to 1 BSPP (1 G).
The adjustment is made by turning the knob clockwise or vice versa.
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.
VSBD are interchangeable with:
