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

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

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 ".

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.

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

We have an office argument going about the use of ball valves versus gate valves on a sewer force main.

The size of this Ball Valve is 18" and it will be installed in a pump station. I have concern regarding how to control/set the emergency closing speed (seconds) and if it is really necessary.

"A listed outside screw and yoke (OS&Y) gate valve shall be installed in the suction pipe. No valve other than a listed OS&Y valve shall be installed in the suction pipe within 50 ft (16 m) of the pum