Welded Bonnet Vs Bolted Bonnet Gate Valve

Body and cover materials.

Welded bonnet vs bolted bonnet gate valve.

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 welded bonnet gate valve expanded view 1. The mechanical characteristics make the scv wedge gate valve are ideal for bi directional total flow system open shut off applications with. Gland bolts nuts.

These valves are highly efficient for service requiring frequent operation and throttling. Bolted bonnets welded bonnet vs. Bolted bonnet gate valves welded vs. The gland bolt and nut allows for easy adjustments for.

The handwheel cycles the valve. Our engineering specifications require welded bonnet gate valves for steam and a variety of others service. The difference of bolted bonnet vs pressure seals vervo valve perfect quality and perfect control. The handwheel nut secures the handwheel to the bonnet assembly.

Bolted bonnets eml mechanical op 28 jan 03 07 45. Our operations and maintenance groups however wish to use bolted bonnets in lieu of the welded b c of the ease of maintenance. 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. In the past i have dealt with bolted bonnet valves so the valves would be disassembled and sent to a furnace for heat treat.

Our operations and maintenance groups however wish to use bolted bonnets in lieu of the welded b c of the ease of maintenance. The stem nut provides a precision guide for proper stem alignment. The difference of bolted bonnet vs pressure seals vervo is a professional manufacturer of forged steel valve our long term as an oem for foreign valves experienced and reputable. Os y rising stem flexible wedge.

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. Pressure seal construction is adopted for valves for high pressure service typically in excess of above 170 bar. Bolted bonnet gate valves eml mechanical op 25 jan 03 14 26. I have a small bore job with numerous welded bonnet gate valves and they need to heat treated because the material includes p91.