Ball valve maintenance matters needing attention

Have longer service life and maintenance free period, will depend on several factors: the normal working conditions, maintain harmony temperature/pressure ratio, and the reasonable corrosion data. Specific precautions: ball valve in the closed state, the body still exist inside pressure fluid; Before repair, remove line pressure and the valve is in open position; Before maintenance, disconnect the power supply or source. Before maintenance, will perform agencies out of stents. Must first find out on the ball valve, the downstream piping have indeed after unloading the pressure, to carry out dismantling operation; Decomposition and assembly again when the sealing surface of the parts, must be careful to prevent injury especially non-metal parts, remove the o-rings inappropriate use of special tools; Assembly the flange bolts must be symmetrical, step by step, tighten evenly; Cleaning agents should be with the rubber ball valve parts, plastic parts, metal parts and working medium ( For example, gas) Are incompatible. Working medium is gas, can use gasoline ( GB484 - 89). Clean the metal parts. Non-metallic parts clean with clean water or alcohol; Break down the single parts can use dip way to clean. Still left did not break down the non-metallic metal parts can be fine clean clean immersion cleaner silk ( In order to avoid fall off fiber adhesion on the parts) Scrub. 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 cleaner, may soak for a long time, After wash wall detergent volatilization and after cleaning, Available not soak cleaner silk cloth to wipe) 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; Use of grease lubrication. Grease and ball valve should be metal material, rubber parts, plastic parts and working medium are incompatible. Working medium is gas, available for example 221 grease. Besmear in seal installation groove on the surface of a thin layer of grease, apply a thin layer of grease on 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 chips, fiber, fat ( With the provisions of the exception) Dust and other impurities, foreign bodies, such as pollution, adhesion, or stay on the parts surface or into the lumen.