... housing casting, conductor, precise valve, pipe fitting, shielding case and machining products. We have our own research and ... design and manufacture small-scale combination valve, automatic compensation for plunger shut-off valve, self sealing valve and ... sealingConnecting,M45×2,M33×2 Accessories Metal protection caps(LY12-CZ),O-ring,Plastic protection caps,Meter connector,Inflatable valve high ...