China Brass Swing Check Valve Manufacturer Shinjo Supplies H44N Brass Swing Check Valve for Oxygen. 

This product is applicable to oxygen pipe network systems worked as one-way valve, playing a role of cuuting off and check, such as preventing cold air backflow in the oxygen system and the mixture of nitrogen and oxygen inthe slag furnace.
The product consists of body, bonnet, disc, etc. The medium enters from one side and makes the disc rising, medium flow; when the medium pressure loses or outlet pressure is greater than inlet pressure, the disc drops automaticly to close the channel, works as check effect. The main parts materials selects silicon brass, with a good fire retardant properties.