butterfly gate valve factory

Gost butterfly valves are Non rising stem, spring loaded check valves with cast iron bodies and pressure balancing discs.The metal to metal disc cannot be disassembled until the valve reaches the required position of the six lugs machined on the disc. The disc contacts an O-ring packing to provide a seal at low operating pressure.

Pneumatic butterfly valve is a type of flow control device consisting of a disk with two opposite sides, each having an inclined periphery, installed inside the valve body. When air pressure acts on one side and presses down the conical surface of the disc, the valve opens.