SCBA Spare Part Breathing Apparatus Cylinder Valve First Valve

Cylinder valve is an important source of gas cylinders switching components, its structured in two ways. One is connected with the valve at the external thread, thread size W21.8mm × 1 / 14 of inch thread connector. The other one is connected with the valve at the internal thread, thread of M22 × 1.5 or G5 / 8 "(14 teeth / inch) connector, commonly used at present for G5 / 8" (14 teeth / inch) thread, valve on the bottle had been marked the first such structure, set up high-pressure cylinder valve security patch, when the gas pressure inside the cylinder pressure of about 25% over rated, the security protection film will explode, the gas pressure relief quickly.