1. Valve type:
Z gate valve, J globe valve, L throttle valve, Q ball valve, D butterfly valve, G diaphragm valve, X plug valve, H check valve, A safety valve, Y pressure reducing valve, S steam trap
2. Valve connection code:
1-female thread, 2-male thread, 4-flange, 6-welding, 7-wafer
3. Valve transmission method:
9-electric, 6-pneumatic, 3-turbine
4. Valve body material:
Z gray cast iron, K malleable cast iron, Q ductile iron, T copper and alloy, C carbon steel, P 304 stainless steel, R 316 stainless steel, V chrome-molybdenum-vanadium steel
5. Valve seat seal:
R 316 stainless steel, T copper alloy, X rubber, S plastic, N nylon plastic, F PTFE lining, H alloy steel, Y hard alloy, J rubber lining, M monel alloy, W valve body material
6. Cast iron valve body is not suitable for the following occasions:
1) Water vapor or wet gas with high water content;
2) Flammable and explosive fluids;
3) Ambient temperature below -20℃;
4) Compressed gas
