Detailed Product Description Dual Plate Double Disc Swing Check Valve Features:Sizes 1/2"-60";DN15-DN1500Class 150-2500 as specified in B16.34; PN1.0Mpa-42.0Mpa as specified in DIN2401Wafer or Lug or Flanged endsSwing typeStandards:Face to Face or End to End: API594&API6D&DIN3202Pressure temperature ratings: ASME B16.34 & DIN2401Flange dimension(RF): ANSI B16.5Inspection & Test: API598Material: ...