Ball pneumatic valve installation and maintenance and the service life of pneumatic valve

a, confirm the pneumatic ball valve before installation preparation

and ensure pneumatic ball valve installation position in coaxial position of the pipeline, pipeline flange should keep two pieces of parallel, confirmed the pipeline to withstand pneumatic ball valve, its weight if found pipeline cannot bear pneumatic ball valve weight, is equipped with the corresponding support of the pipeline before installation.
and confirm whether there is impurities inside the pipeline, welding slag, etc. , must be put inside the pipeline purging and clean.
, check the pneumatic ball valve nameplate, and pneumatic ball valve is fully open full close several operation, confirmed the pneumatic valve works, overall check again all details of pneumatic valve, pneumatic valve is in good condition.
and remove the protective cover on both ends of the pneumatic valve, pneumatic valve body check whether clean, cleaning the pneumatic valve body cavity, as a result of the pneumatic ball valve sealing surface shape is the ball, even small debris may also be the sealing surface damage.

2, the installation of the pneumatic ball valve

, pneumatic ball valve can be installed at any section at the upstream end, handle pneumatic ball valves may be installed in any position, if the configuration actuator ( Such as gear box, electric - Pneumatic ball valves, pneumatic actuators must be installed vertically, pneumatic valves on the import and export in a horizontal position.
, pneumatic ball valve flange and pipe flange gasket fitted according to the requirements of pipeline design.
, flange bolts need to be symmetrical, successive, evenly tighten.
, if the pneumatic ball valve adopt pneumatic, electric actuators, according to the instructions to complete the installation of the air supply, power supply.

3, pneumatic ball valve installed check

and after the installation, start the pneumatic ball valve open and close several times, should be flexible, force uniform, pneumatic ball valve is working properly.
design requirements, according to the pipeline pressure, pressure after testing pneumatic ball valve and pipe flange joint surface sealing performance.

4, pneumatic ball valve repair

only removable pneumatic ball valve, pressure before and after dismantling operations to the pneumatic ball valve.
, in the pneumatic ball valve of the decomposition and assembly process again, need to have the protection of the sealing parts, especially the nonmetallic parts, parts like o-rings it is best to use special tools.
, pneumatic ball valve, pneumatic valve body to assembly to tighten bolts must be symmetrical, gradually and evenly.
should, cleaning agents and pneumatic ball valve of the rubber parts, plastic parts, metal parts and working medium ( Such as gas are incompatible. Working medium is gas, can use gasoline ( GB - Clean the metal parts. Non-metallic parts clean with clean water or alcohol.
, break down of a single component can use the way of baptism to clean. Still left did not break down the non-metallic metal parts can be used dry rotor pump net fine clean impregnated with cleaner silk ( In order to avoid fall off fiber adhesion scrub on the parts. When cleaning should remove all adhesion on the surface of grease, dirt, plastic product, dust, etc.
non-metallic parts after cleaning, shall be immediately removed from the cleaning agent, may soak for a long time.
and after wash wall cleaning agent to volatilize and after cleaning, Available not soak cleaner silk are assembled, but shall not be shelved for a long time, or it will rust and dust pollution.
, the new parts also need to be cleaned before assembly.
and use of grease lubrication. Grease and pneumatic ball valve should be metal material, rubber parts, plastic parts and working medium are incompatible. Working medium of gas, available such as grease. Besmear in seal installation groove on the surface of a thin layer of grease, apply a thin layer of grease on the rubber seals, pneumatic valve stem seal face and friction surface coated with a thin layer of grease.
, the assembly should be there is no metal chips, fiber, fat ( Regulations except use of dust and other impurities, foreign bodies, such as pollution, adhesion, or stay on the parts surface, or into the lumen