They come in the shape of a double pressure gaugevalve. The main aim during the design phase was tocontain the running costs when used on measuringsystems and to obtain a saving by using double valves with different nipples and unions..
The threaded bleeding hole allows drainage through a pipe and hence fluid recovery. The body is machined from a bar and is available in stainless steel or galvanized carbon steel. On request, versions with galvanized ASTM A105 steel accessories..