SANT Dual Plate NRV is a compact wafer-type check valve designed to prevent reverse flow automatically in pipelines. The two plates open with forward flow and close automatically when flow stops or reverses. SANT offers versions including the DP PN16 and DP2 PN25 models. DP Model – PN16 Specifications Pressure Rating: PN16 Body Material: Cast Iron Disc Material: Ductile Iron (SG Iron) Seat: EPDM rubber lining Hinge Pin & Stop Pin: Stainless Steel AISI 420 Spring: Stainless Steel AISI 304 Bush/Bearing: PTFE Plug: Stainless Steel AISI 410 End Connection: Wafer type, suitable for clamping between ASME B16.5 Class 150 flanges Body Test Pressure: 24 kg/cm² hydraulic Seat Test Pressure: 16 kg/cm² hydraulic Size Range: DN50 to DN400 (2“ to 16“) DP2 Model – PN25 Specifications Pressure Rating: PN25 Body Material: Ductile Iron Disc Material: SS304 / CF8 Seat: EPDM rubber lining Trim: Stainless Steel spring and pins Bush: PTFE End Connection: Wafer type Body Test Pressure: 3.8 MPa hydraulic Seat Test Pressure: 2.7 MPa hydraulic Size Range: DN50 to DN300 (2“ to 12“) Features Compact wafer-type design Spring-assisted fast closing Helps prevent reverse flow Dual-plate design provides low pressure drop Lightweight and easy to install PTFE bearing for smooth operation Suitable for installation between flanges Reliable automatic operation without external power Applications Water pipelines HVAC systems Pump discharge lines Water-treatment plants Fire-water systems, where the appropriate specification is selected General industrial piping systems