In many applications the use of a combination of a stop valve and a check valve is used. This results in two pressure containing parts, two potential leak paths and the added issues of space and especially weight.

Based on globe valves, stop-check valves have been developed in the past. By mounting a loose disk on the spindle, the disk can function as a check valve. The main disadvantage is that these valves in most cases have not been designed as stop check valves. A second disadvantage is the fact that the pressure drop over this type of valves is high, due to...

(download the full paper below and our flyer about how Pulrose CCGT Station saved £1m installing a replacement stop check valve)