1、阀门类型代号的Z、J、L、Q、D、G、X、H、A、Y、S分别表示：闸阀、截止阀、节流阀、球阀、蝶阀、隔膜阀、旋塞阀、止回阀、安全阀、减压阀、疏水阀
1. Valve type codes Z, J, L, Q, D, G, X, H, A, Y and S are respectively expressed as gate valve, globe valve, throttle valve, ball valve, butterfly valve, diaphragm valve, cock valve, check valve, safety valve, relief valve and trap.
2、阀门的连接式代号1、2、4、6、7分别表示：1—内螺纹、2—外螺纹、4—法兰、6—焊接、7—对夹
2. Connecting type codes 1, 2, 4, 6 and 7 of valves are respectively expressed as: 1-internal thread, 2-external thread, 4-flange, 6-welding, 7-pair clamp.
3、阀门的传动方式代号9、6、3分别表示：9—电动、6—气动、3—涡轮蜗杆
3. The transmission mode codes 9, 6 and 3 of the valves are: 9-electric, 6-pneumatic and 3-turbine worm, respectively.
4、阀体材料代号Z、K、Q、T、C、P、R、V分别表示：灰铸铁、可锻铸铁、球墨铸铁、铜及合金、碳钢、铬镍系不锈钢、铬镍钼系不锈钢、铬钼钒钢
4. Valve body material codes Z, K, Q, T, C, P, R and V are respectively expressed as gray cast iron, malleable cast iron, nodular cast iron, copper and alloy, carbon steel, Chromium-Nickel Stainless steel, chromium-nickel-molybdenum stainless steel, chromium-molybdenum-vanadium steel.
5、阀座密封或衬里代号R、T、X、S、N、F、H、Y、J、M、W分别表示：奥氏体不锈钢、铜合金、橡胶、塑料、尼龙塑料、氟塑料、Cr系不锈钢、硬质合金、衬胶、蒙乃尔合金、阀门本体材料
5. Seat seals or lining codes R, T, X, S, N, F, H, Y, J, M and W are respectively expressed as austenitic stainless steel, copper alloy, rubber, plastics, nylon plastics, fluoroplastics, Cr stainless steel, cemented carbide, lining, Monel alloy, valve body material.
6、铸铁阀体不适合用于的场合有：易燃易爆流体；环境温度低于－20℃场合；压缩气体；水蒸气或含水量多的湿气体。
6. Cast iron valve body is not suitable for the occasions: inflammable and explosive fluid; ambient temperature below - 20 C; compressed gas; water vapor or moisture content of wet gas.
法兰密封面型式主要有：全平面(FF)、突面(RF)、凹(FM)凸(M)面、榫(T)槽(G)面、环连接面(RJ)等。
The main types of flange sealing surface are: full plane (FF), protruding surface (RF), concave (FM) convex (M) surface, tenon (T) groove (G) surface, ring connection surface (RJ), etc.
