a, the installation of ball valve

the preparation before installation

1, the pipeline before and after the ball valve has been ready. Before and after the pipe shall be concentric, two flange sealing surface should be parallel. Pipe 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, remove oil pipe, welding slag, and all other impurities

3, a sign of check valve, ball 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. Any end of the valve can be installed at the upstream end. can be installed on the pipeline driven by the handle. 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, valve, flange and pipe flange according to the requirements of pipeline design mount gasket between

3, flange bolts need to be symmetrical, successive, uniform tight

4, pneumatic pipeline connection ( Using pneumatic drive)

after installation check

1, drive valve opening and closing operation several times, should be no sluggish acerbity, confirmed that they work

2, according to the requirements of pipeline design and the ball valve flange joint surface of the pipes to seal performance check

2, ball valve repair

pieces must first find out on the ball valve, the downstream piping have indeed after unloading the pressure, dismantling operations to

when mixer decomposition and assembly again must be careful to prevent damage the sealing surface of the parts, especially the nonmetallic parts, remove the o-rings inappropriate use of special tools

when the mixer assembly flange bolts must be symmetrical, gradually and evenly tighten

mixer cleaner should be with the rubber ball Industrial Valves 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

pieces break down of individual parts can be cleaned with baptism. 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, such as dust

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

pieces after wash wall cleaning agent to volatilize and after cleaning, Available not soak cleaner silk cloth to wipe) Are assembled, but shall not be put on hold for a long time, or it will rust and dust pollution

pieces new parts also need to be cleaned before assembly

mixer used lubricating grease. 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 the rubber seal, valve stem seal face and friction surface coated with a thin layer of grease

when mixer assembly should not be allowed to have metal scraps, fiber and 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 inner cavity

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