Ball Valve, Needle Valve, Check Valve manufacturer / supplier in China, offering Oil Pressure Sampling Precision 1/2" Female BSPT Threaded Gas Hydraulic Rotating Needle Valve, Stainless Steel SS304 SS316 1/4 NPT 6000 Psi High Temperature High Temperature Male to Female Thread Forged Regulating Hydraulic Needle Valve, 316 Stainless Steel 6000 Psi 1/4 1/2 Inch Flow Control Instrument Straight Ferrule Compression End Needle Valve and so on.