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Reduced bore ball valve 2010-10-15
Reduced bore valves are commonly used for intra-unit applications. Many exceptions exist such as piggable lines, low pressure compressor suction piping.
multi-turn ball valve 2010-10-15
Multiturn is normally used for valves with a construction where the closing element does not move 90 degrees, eg. normally for globe or gate valves with threaded stems, requiring several turns to clos
Valve Port Terminology Clarification 2010-10-15
There are actually three versions of port size:
Full Port is "true full", and can be a relative term based on the I.D. of your Pipe (Schedule of your pipe).
Ball Valve Dimensions 2010-10-14
What the manufacturers do is select the shortest possible length from the available sizes in which they can fit the ball, seats, flanges, assembly of the flange and any body bolting.
Welding ball valves 2010-10-14
These are crayons, tablets, or paints that indicate a temperature by melting at specific the specific temperature indicated on the crayon. Templestick is one brand name and had been around a long time
Valve Back Pressure 2010-10-14
In normal conditions (not limitated as in critical/cavitating/flashing cases) there is a relation between flow and pressure drop and providing you get a curve CV/Aperture it shouldn't be difficult to
Trunion Mounted ball Valve 2010-10-14
A trunnion mounted valve means that the ball is constrained by bearings and is only allowed to rotate. The bearings act on the trunions .
DPE Seat Ball valves 2010-10-14
Often there is confusion regarding DPE (double piston effect) seats, and DBB (double block and bleed), and we now have DIB-1 and DIB-2 in Annex B of ISO 14313/API 6D in the mix.
