Douglas - Model 800 -Bellows Sealed Bolted Bonnet Gate Valves

Ratings (ASTM A105): 800 p.s.i. @ 850°F, 1440 p.s.i. @ 100°F. Test pressure (ASTM A105): Hydraulic:(minimum): Body - 2180 p.s.i., Seat - 1495 p.s.i. Air under water: Seat - 85 p.s.i. Standards: Construction: BS 5352, Socket weld: ASME B16.11, Threaded: ASME B1.20.1, Test: BS 6755 (Pt.1). Connections (xx): SW: Socket weld, B8: Butt weld 80, TH: Threaded NPT, TS: Sw/NPT, SE: Sw(e)/NPT, SU: Sw(u)/NPT, B4: Butt weld 40.