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 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 is 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 also damage the valve seat sealing surface.
Second, the installation
1, the valve is installed on the pipeline.
Any end of the valve can be installed at the upstream end. Valve 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.
2, valve, flange and pipe flange gasket fitted according to the requirements of pipeline design.
3, flange bolts shall be symmetrical, successive, evenly tighten.
When using the pneumatic drive 4, pneumatic pipeline connection ().
Third, check after installation
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 tests
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