1.swing check valve. 2.Pressure:150~300lbs. 3.size:1/2"-2". 4.ISO9001 certification. swing check valve.Product Name: Female threaded swing check valve, swing check valve,check valvesThread Standard: G. NPT, BSPT. BSP. DIN259/2999Suitable Medium: Water, oil, steam, nitric, acid, acetate acid and some corrosive liquidsTemperature Range: -40C~180CWorking Pressure: 1.6~6.4MPaMain Material: CF8, CF8M, ...