Ball valve has a simple structure, good sealing, small volume, light weight, less material consumption, installation of small size, transmission torque is small, easy to operate, the advantages of open and close quickly, in recent decades is one of the fastest growing varieties valve, ball valve evolved by the plug valve, open and shut down parts of it as a sphere, using the ball around the stem axis rotate 90 degrees to achieve the purpose of opening and closing, the valve is mainly used for cutting, distribution and change the direction of the medium flow in the pipeline,

Ball valve installation and maintenance of the note
1, want to leave the position of the valve handle rotation,
2, cannot be used for throttling,
3, the belt transmission mechanism of ball valve should be installed upright,
Ball valve in the closed state, the body still exist inside pressure fluid
Before the repair, remove line pressure and make the valve is in open position, disconnect the electricity or gas, actuators and support from
Must first find out the ball valve, the downstream piping have indeed after unloading the pressure, dismantling operations to
Decomposition and assembly again when the sealing surface of the parts, must be careful to prevent injury especially non-metal parts, o-rings inappropriate use of special tools
Assembly the flange bolts must be symmetrical, gradually, evenly tighten
Cleaner should be with the rubber ball valve parts, plastic parts, metal parts and working medium (such as gas, for example) are compatible, working medium is gas, can use gasoline wash metal parts (GB484-89), non-metallic parts clean with clean water or alcohol
Break down individual parts can clean with dip way, still left did not break down the non-metallic metal parts can be used to clean the fine clean impregnated with cleaner silk fall off (to avoid fiber adhesion) on parts scrubbed, when cleaning should remove all adhesion on the surface of grease, dirt, glue, dust, etc.
Non-metallic parts shall be immediately removed from the cleaning agent, after cleaning shall not long soak
After cleaning after wash wall cleaning agent to volatilize and soak cleaner brush silk) (available for which the assembly, but shall not be put on hold for a long time, or it will rust, dust contamination
The new parts also need to be cleaned before assembly
Use of grease lubrication, grease and ball valve should be metal material, rubber parts, plastic parts and working medium are compatible, working medium is gas, can be used, for example, 221, grease on the surface of the seal installation groove a thin layer of grease, apply a thin layer of grease on the rubber seal, valve stem seal face and friction surface coated with a thin layer of grease
Assembly time should not be allowed to have metal scraps, fiber, oil (except regulations used) dust and other impurities, foreign bodies, such as pollution, adhesion or stay on the parts surface or into the inner chamber,