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It is used when you want to regulate the oil flow in one direction and have full flow in the opposite direction, the valve is not compensated and consequently the regulation will depend on the operating pressure, viscosity and temperature of the fluid. The range includes different threads from 1/4 BSPP (1/4 G) up to 1 BSPP (1 G). The outer body is made of high-strength steel and is protected externally against oxidation with a galvanising treatment. A zinc/nickel surface treatment can be requested to increase oxidation resistance, in case the valve is poorly protected and exposed to the weather, for example.
