Cast Iron NRV PN 1.0 with Bypass (Flanged) Model 1083B

One-way (non-return) valve for 50 mm (2") lines — flow pushes it open, reverse flow shuts it automatically; no handle. Swing + bypass gate valve design, works in horizontal or vertical lines. Cast iron construction, Flanged IS 1538 / IS 5312 Pt 1 ends. Tested to 1.5 MPa shell / 1.0 MPa; up to 80°C. For water. Factory-fitted GI bypass with ISI Class-1 bronze gate valve.