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Buterrfly: Soft vs Hard seats 2010-11-09
A butterfly valve on LP Nitrogen and Instrument Air (9 barg @ 85ºC) with hard seats (SS 316L).What will stop me on changing it to Soft Seats (PTFE)?
Broken valve stem 2010-11-09
If a valve stem is broken, can it be welded back together in field?If the welded area goes through the packing, he packing will be destroyed on the first stroke.
3" throgh 6" rubber seated butterfly valve popping out of seat 2010-11-09
3", 4" and 6" butterfly valves with double acting air to air actuators on them. The valve seat is a dovetail design.
Valve Design Standard 2010-11-09
The different Codes / Standards used for design of Pressure Reducing Valves.Please narrow the question.
Cocentric vs eccentric butterfly valves 2010-11-09
The selection factors for Cocentric vs eccentric butterfly valves.Centric/Flat disc/rubber-lined butterfly valves were the first developed.
Special Class Valve Ratings 2010-11-08
The B16.34 Special Class Table values. the Valves in question are CL1500 special class.
Butterfly Valves- Wafer Lugged or Flanged 2010-11-08
For Tripple Offset Butterfly valves in sizes from 24" and above which is more preferred wafer lugged or flanged ends?
silicon free butterfly valve 2010-11-08
Assume that silicon is not compatible with the contained fluid. Perhaps the requirement pertains to the soft goods only.
