... and manufacture small-scale combination valve, automatic compensation for plunger shut-off valve, self sealing valve and double-headed valve. Our products have passed ... 500m/s2 11ms Operating life,5000 times Material & connection Valve body,LY12-CZValve core:,1Cr18Ni9TiSealing,EPDM(E),metallic sealingConnecting, ... ),O-ring,Plastic protection caps,Meter connector,Inflatable valve metal Combination valve