Product: DIN Standard Swing Check Valve DIN Swing Check Valve: Design Standard: DIN3840 Face to Face Dimension: DIN EN558-1 End Flange Dimension: DIN EN1092-1 Material of Body: GS-C25, SS304, SS316 Pressure Rating: PN16-PN40 Test Standard: DIN EN12266-1 Main Structural Features. 1.This product has logical structure, reliable seal, excellent performance and nice design. 2.Sealing face is overlayed by STL, which is friction-resistant, corrosion resistant to ensure a long time use life. 3.The parts material, flange and butt welding dimension may selected according to current operating condition or users' requirement to meeting the requirement of various engineering. -