1, the use of the products
This product is suitable for such systems as the oxygen pipe network ,etc. and play a role in damming and stopping going back as the non-return valve, if rich oxygen system prevent cold wind from flow backwards, spatter dreg stove prevent nitrogen , oxygen bunch each other.

2 , product structure and operation principle
2.1 This product is made up of valve body , valve are covered , valve board ,etc., it makes the valve board rise that the medium is entered from one end , the medium circulates; When the medium pressure disappears or exports the pressure and is greater than the inlet pressure , the valve board drops and closes the passway by oneself , play a stopping going back role.
2.2 The valve main part material selects the silicon brass for use , have good hindering fire performance .