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Ball valve leak test 2010-10-25
A standard for allowable leak rates during ball valve testing,addressing shutoff valves (bubble tight) instead of control valves (which leak like a sieve).
Positive Isolation - Blinds 2010-10-25
Positive isolation can be obtained with the correct selection of valves. Use a DBB (double block and bleed) valve and you can have the isolation that is required.
Ball Valve Seat Geometry 2010-10-25
Differences in ball valve design, especially with respect to Ball/Seat combinations in metal sealing applications.
Bubble Tight Shutoff 2010-10-25
A vendor who quoted me 'bubble tight shutoff' for several full bore ball valves. No mention even of FCI 70-2 (Classes I thru VI for control valves - some ball valve companies do) or even API 598 on hi
Ball Valve Seat Damage 2010-10-25
A water system with a large manifold feeding 10 3 inch pipes. Each pipe off the header has one 3" ball valve, about 1 ft of pipe and a nozzle.When complete the valves are commanded closed under full
Actuation Torque Vs Pressure drop curve for BALL VALVE 2010-10-22
Industrial expert's opinion is maximum torque required to actuate ball valve is"Torque ability to open under large differential pressure and to close under high flow conditions ".
Ball Valve Pressure Loss 2010-10-22
At one time I had a table that listed flow coeficients versus percent open for Cameron ball valves but I can no longer find it.It seems to be a somewhat vague enquiry.
Hydropower ball valve - High Head, silty water 2010-10-22
With 700m head and 5cms flow (1000psi, 80,000gpm) and the water is fairly silty. The original was a trunion mounted ball valvetalking about an ANSI Class 600 equivalent valve (1440 psi rated pressure
