Instrument valves and pipe fittings installation specification

Instrument of type pipe valve regulation is as follows: 1, general appropriate chooses socket type valve, also can choose other types of valves. 2, if the guide tube is liquid, line the top globe valve should be used as a vent valve. 3, in the guide tube minimum applies a gate valve, ball valve or valve for drain valve. 4, the valve material appropriate for the carbon steel or stainless steel, also can use the material according to the process conditions. 2 meter guide the selection of pressure pipe fittings provisions are as follows: 1, elbow, straight, appropriate USES three-way or four-way joint socket connection. 2, lead the removable joint on the pressure pipeline should not be more than 3, appropriate USES removable joint thread or high ZhiLiangKa set of connection mode. 3, pipe material should be equal to or better than of material pipe. 3 pneumatic signal pipe and air pipe: 1, the gas supply pipe should be the main gas supply ( A) Tube top or side elicit and cut-off valve, cut-off valve of the gas pipe should be a gate or ball type valve for threaded connections. 2, leads to meter gas supply pipe should be installed air valve. 3, gas supply piping valves should be metal, brass material can be used indoor, outdoor and environmental conditions of appropriate USES carbon steel or stainless steel valve occasions; Pneumatic signal line for stainless steel pipe fittings and valves should be material. 4, each local pneumatic instruments should be installed a small filtering pressure reducing valve. 5, gas pipe fittings and valves appropriate USES threaded connections. 6, pneumatic signal pipe on the pipe