1. Directional. The valve body of the general Valve has a mark, the direction that the arrow refers to is the direction that gas flows forward. Special attention must be paid to the counter.

Because of a variety of valve requirements of gas one-way flow, such as relief valve, valve, check valve, throttle valve, for the cut-off valve in order to facilitate the opening and maintenance, but also required gas from the bottom through the seat, but the gate valve, plug installation, not limited by the direction of circulation. 2. Installation location. To the valve long-term operation and maintenance considerations, as convenient as possible operation and maintenance, but also pay attention to the appearance of the assembly. Valve handle direction can be vertical upward, can also tilt to a certain angle or level, but the hand wheel should not be downward to avoid the face operation; The handwheel of the landing valve is the best chest height, easy to open and close; the gate valve can not be used underground to prevent the stem from being corroded. Some valve installation location has special requirements, such as pressure relief valve upright installed in the horizontal pipe, no tilt, lift check valve required disc vertical; Swing check valve requires pin shaft level.

In short, according to the principle of the valve to determine its installation position, otherwise the valve can not work effectively, or even ineffective. 3. Plug installation. Check the specification model, identify if there is damage, remove the thread mouth cover and excessive grease and sundries inside the thread, check the sealing performance of the plug.

Gas plug in the installation must pay attention to the appropriate force, according to the size of the plug to choose different specifications of the pipe pliers or wrenches to install.

4, The Wire buckle valve installs, the valve company should ensure the thread intact, can use spanner wrench, do not use the tube clamp, avoids damaging the body appearance.

5, flange-type valve installation, must ensure that the two flange sections parallel to each other and on the same axis, tightening bolts should be cross cross, so that the valve end of the force evenly. 6, the flange and the threaded connection valve should be installed in the shutdown state.

Butt welding valve and pipe connection, weld bottom should use argon welding, to ensure the internal cleaning, welding, the valve should not be closed to prevent heat deformation.

7, under normal circumstances, the valve and corrugated telescopic joint directly connected, it should be based on valve and corrugated telescopic joints and the size of flanges and gaskets, the two sides of the pipeline cut off, leaving the installation location. 8, the valve hoisting, the rope can not be tied in the first round or stem, to prevent damage, should be light hanging, handle, not collide. On the pier, according to the required elevation cushion stability, cushion flat. The valve must have a solid pier or bracket to hold the valve and not allow the valve to be suspended to generate stress.