Welded Bonnet Vs Bolted Bonnet Gate Valve

Our operations and maintenance groups however wish to use bolted bonnets in lieu of the welded b c of the ease of maintenance.

Welded bonnet vs bolted bonnet gate valve. I have a small bore job with numerous welded bonnet gate valves and they need to heat treated because the material includes p91. Scv valve manufactures superior cast body bolted bonnet os y gate valves in a variety of materials trims packing types sizes 2 thru 48 and pressure classes 150 thru 2500. Bolted bonnet gate valves welded vs. These valves are highly efficient for service requiring frequent operation and throttling.

Our engineering specifications require welded bonnet gate valves for steam and a variety of others service. Body and cover materials. The stem nut provides a precision guide for proper stem alignment. The gland bolt and nut allows for easy adjustments for.

Our operations and maintenance groups however wish to use bolted bonnets in lieu of the welded b c of the ease of maintenance. The difference of bolted bonnet vs pressure seals vervo valve perfect quality and perfect control. Os y rising stem flexible wedge. Bolted bonnet globe valve camtech globe valves are heavy duty outside screw and yoke type bolted bonnet rising stem and rising handwheel type.

Astm a216 wcb a217 wc1 a217 wc6 a217 wc9 a217 c5 a217 c12 a217 c12a a352 lcb a352 lcc a351 cf8 a351 cf8m a351 cf8c a351 cf3 a351 cf3m a351 cn7m duplex and superduplex a890 995 gr 4a a890 a995 gr 5a a890 a995 gr 6a alubronze cc333g bs1400 ab2 b148 c95800 nickel alloys. Bolted bonnet threaded or welded seat ring. In the past i have dealt with bolted bonnet valves so the valves would be disassembled and sent to a furnace for heat treat. Pressure seal construction is adopted for valves for high pressure service typically in excess of above 170 bar.

The unique feature about the pressure seal bonnet is that the body bonnet joints seals improves as the internal pressure in the valve increases compared to other constructions where the increase in internal pressure tends to create leaks in the body bonnet joint. The handwheel cycles the valve. The handwheel nut secures the handwheel to the bonnet assembly. Bolted bonnets eml mechanical op 28 jan 03 07 45.

Bolted welded bonnet gate valve expanded view 1. Bolted bonnet gate valves eml mechanical op 25 jan 03 14 26. Bolted bonnets welded bonnet vs. Gland bolts nuts.