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valve torque leading factors 2010-10-13
Ball valves torque is determined by the seat material, the ball material, the process fluid lubricating (or fouling) the seats, the pressure differential loading the ball against the seat, the design
150# ball valves - trunnion vs floating 2010-10-13
most low pressure applications request 2 piece floating ball valves and when not specified I've always sold the 2 piece floater. What instances would a 150# or 300# trunnion be the preferred design.
Description clarification on Ball Valves Primary/Secondary seal 2010-10-13
a description for the seating of a 30inch ball valve as Primary metal and secondary soft. Does it mean that the ball is soft seated.
History of Ball Valves 2010-10-13
The first spherical ball-type valve >was patented in 1871 by John Warren and assigned jointly to John Chapman, the founder of Chapman Valve Co.
leakage in metal seated ball valve 2010-10-13
We are having really very tough time while producing small metal seated ball valves in the range of 3/4" class 150(Floaters) to 2" class 300(trunnion).
Extreme temp challenges for stuffing boxes 2010-10-11
Technor finds a sub-sea niche 2010-10-11
