Different Type Check Valve suppliers Product Description Working principle of stainless steel flange check valve: The check valve automatically opens and closes the valve flap depending on the flow of the medium itself to prevent the backflow of the medium. Execution standard and performance specification Nominal diameterDN8-DN100, 1/2"-12" Nominal pressurePN16 Shell strength test pressurePN2.4MPA Low pressure air tightness test pressure0.8MPA Applicable mediaWater, oil, gas, nitric acid, acetic acid Design and Manufacturing StandardsANSI B16.34, GB/T-12224-2015 Test StandardAPI598, GB/T13927-2008, EN12516-3 thread standardG, BSP, BSPT, DIN259, DIN2999, ISO228, NPT, PT, ISO7/1 Stainless steel flange check valve main parts material table valve bodyA216 (WCB), A351 CF8, CF8M, CF3M, 321, 2205 valve plateSUS304, SUS316, SUS316L, SUS321, SUS2205 valve seatSUS304, SUS316, PTFE, RPTFE, M111, M1600, M1700, PPL screwSUS304, SUS316 Stainless steel flange check valve storage, maintenance, installation and use 1. The valve should be stored in a dry and ventilated room, and both ends of the valve channel should be blocked. 2. Valves stored for a long time should be checked regularly to remove dirt. Special attention should be paid to the cleaning of the sealing surface to prevent damage to the sealing surface. 3. Before installation, carefully check whether the valve mark conforms to the use requirements. 4. Check the inner cavity and sealing surface of the valve before installation. If there is any dirt, it should be wiped with a cleaning cloth. 5. Before installation, it should be noted that the valve direction mark is consistent with the flow direction of the medium. 6. The lift-type vertical flap check valve should be installed on the vertical pipeline, and the lift-type horizontal flap check valve and the swing check valve should be installed on the horizontal pipeline. 7. Pay attention to whether the valve has abnormal sound and vibration during use. In order to prevent the water hammer effect in the pipeline, pay attention to the fluctuation of the medium pressure in the pipeline. Why choose us? Kaifeng High Middle Pressure Valves Co.,Ltd.'s advanced design concept combined with precise CNC processing technology, the processing dimensions of each valve are strictly controlled within the tolerance range, and all structural design and accessories selection processing dimensions are strictly in accordance with industry front-end standards and 6S, CE, TS, ISO9001, ISO14000, ISO18000, API, GB, standard implementation. Make each valve practical, long life, and bring high value to customers.Different Type Check Valve suppliers website:http://www.ka-valve.com/check-valve/different-type-check-valve/