1.swing check valve. 2.Pressure:150~300lbs. 3.size:1/2"-2". 4.ISO9001 certification. ... , acid, acetate acid and some corrosive liquidsTemperature Range: -40C~180CWorking Pressure: 1.6~6.4MPaMain Material: CF8, CF8M, CF3, CF3M, WCBSize ... , 3.8, 6.0, 9.6,Seat testing pressure(low pressure)0.6Seat testing pressure(high pressure)1.8, 2.8, 4.4, 7.1Applicable ...