One, the installation of ball valve
Before the installation of preparing
1, the pipeline before and after the ball valve is ready for pipeline should be coaxial, before and after the two flange sealing surface should be parallel to the pipeline should be able to bear the weight of the ball valve, otherwise the line must be equipped with the appropriate support
2, before and after the valve pipe purging clean, oil, remove the pipe welding slag and all other impurities
3, check the ball valve, check valve is in good condition, the valve fully open full closed several times to confirm they work
4, on the other side of down ball valve on the connecting flange protection
5, the check valve hole clearance may have dirt, and then clean the valve hole, between the seat and the ball even if only small particles of foreign matter may damage the valve seat sealing surface
Install
1, the valve is installed on the pipeline, valve can be installed in any end of the upstream side, the valve driven by the controller can be installed in any position on the pipeline, but with a gear box or pneumatic actuator ball valve should be installed upright, is installed in a horizontal pipe, and drive in the pipeline above
2, the valve between the flange and pipe flange according to the requirements of pipeline design mount gasket
3, flange bolts need to be symmetrical, successive, uniform tight
When using the pneumatic drive 4, connect the pneumatic pipeline ()
After installation of check
1, operating drive rev, ball valve closed several times, should be no sluggish acerbity, prove they work
2, according to the requirements of pipeline design and the ball valve flange joint surface of the pipes to seal performance check

Ball valve before installation to
1, ball valve, pipe before and after the installation is ready, before and after the pipe should be coaxial, two flange sealing surface should be parallel to the pipeline should be able to bear the weight of the ball valve, otherwise the pipeline must be equipped with appropriate support
2, blow out of the tube before and after the valve, remove the oil in the pipeline, welding slag and other impurities
3, check the ball valve, to ensure that the ball valve is in good condition, open and close the valve several times, in order to verify its normal work
4, remove the connected ball valve at the end of the flange protection
5, the check valve hole for dirt, and then clean the valve hole, even if there is small foreign body between the seat and sphere particles, and may damage the valve seat sealing surface

Ball valve installation
Receiving line 1, the valve, the valve of any one end can be installed on the upper end, driven by the handle valves can be installed in any position of the line, but the ball valves and the gearbox or pneumatic actuators shall be installed upright, namely in a horizontal pipe, the transmission device in pipeline
2, the valve flange and pipe flange sealing gasket installation according to the requirements of pipeline design
3, flange bolts need to be symmetrical, continuous, uniform fastening
4, pneumatic pipe connection (when using the pneumatic actuator)

Ball valve is installed check
Open/close ball valve 1, transmission operation several times, should be no acerbity, verify its normal work
2, according to the requirements of pipeline design and ball joint surface sealing performance test

Second, the maintenance of the ball valve
Before remove the ball valve, ball valve maintenance must first determine the ball up and down the tube has been unloaded pressure

Remove and reinstall, must pay attention to prevent damage to parts of sealing surface, especially non-metal parts, remove and reinstall, flange bolts must be symmetrical, gradually and evenly tighten

Cleaner and ball valve in the rubber parts, plastic parts, metal parts and working medium (such as gas) compatible, when the working medium is gas, metal parts available gasoline cleaning (gb484-489), non-metallic parts clean with clean water or alcohol, individual components can be cleaned with immersion cleaning method

Non-metallic parts of metal components containing did not decompose can use dip with cleaner clean, careful, wipe clean silk (to prevent fiber drop and adhesion on parts)

Non-metallic parts shall be immediately removed from the cleaning agent, after cleaning shall not long soak

All attached on the metope of non-metal components, such as grease, dirt, glue and dust, should immediately after cleaning from cleaner in a clean, do not soak for a long period of time after cleaning cleaning should be volatile after the assembly (don't use silk cleaner), but do not use for a long time, or it will rust and dust pollution

New parts before assembly should be clean and grease lubrication, grease and ball valve should be metal material, rubber parts, plastic parts and working medium incompatible

In the installation of sealing groove surface coated with a thin layer of grease, coated with a thin layer of grease on the rubber seal, valve stem seal face and friction surface coated with a thin layer of grease component

There is no metal pieces, fiber, grease (except use regulations) dust and other impurities, foreign bodies and other pollutants, adhesion or stay in the surface of the parts or cavity in the body