Knife Gate Valve, Ball Valve, Forged Steel Valve manufacturer / supplier in China, offering API/DIN/JIS Stainless Steel Vacuum Pressure Relief Negative 1500lb Flange Pressure Safety Valve for Oil Gas, DIN/API/ANSI/GOST 150lb Cast Steel Industrial Flange Cast Iron Pipe Acid Pneumatic Pinch Valve, API/DIN A105 CF8m High Pressure 2500lb Mounted Flange Gas Cl1500 Forged Steel Ball Valve and so on.