There are two types of air valves: single port air valve and double port air valve. The following takes the double-port air valve as an example to introduce its structure and working principle.

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There are two types of air valves: single port air valve and double port air valve. The following takes the double-port air valve as an example to introduce its structure and working principle.

Under the action of the fluid pressure flowing in one direction, the valve disc opens, when the fluid flows in the opposite direction, the fluid pressure and the self-coincidence of the valve disc act on the valve seat, thereby cutting off the flow. Among them, the swing check valve belongs to this

The difference between rising stem gate valve and non-rising stem gate valve:1. The rising stem gate valve can see the screw rod, but the non-rising stem gate valve cannot see the screw rod.2. The rising stem gate valve raises or lowers the valve clack through the threaded transmission of the valve