One-way valves
Used in all those circumstances where you need the full flow in one direction and the block in the opposite direction, they are built in various sizes with threads from 1/4 BSPP (1/4 G) up to 1-1/2 BSPP (1-1/2 G).
The external body is made of high resistance steel and protected externally from oxidation with a zinc plated. It is possible to request a surface treatment in zinc / nickel to increase the resistance to oxidation, in case the valve is poorly protected and exposed to atmospheric agents.
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