Three steps in installing ball valves
There are three steps in installing ball valves.
1 Pre-Installation
(1) ball around
the pipeline is ready. Before and after the pipeline should be coaxial, the two
should be parallel to the flange sealing surface. Pipeline should be able to
withstand the weight of the ball valve, or pipe must be equipped with the
appropriate support.
(2) to clean and purge valve before and after the pipe,
removed the oil pipeline, welding slag, and all other impurities.
(3) check
valve symbol to identify valve intact. Fully open the valve fully closed several
times confirmed that it is working.
(4) remove the valve protection on both
ends of flange pieces.
(5) Check the valve clearance hole may have dirt, then
clean the valve hole. Even between the valve seat and the ball only small
particles of foreign matter may damage the valve seat sealing surface.
2 Installation
(1) the valve mounted on the
pipeline. Either end of the valve can be installed in the upstream side. Driven
by the valve handle can be installed anywhere in the pipeline. But with a gear
box or pneumatic valve driver installation should be upright, that is installed
in horizontal pipelines, and the drive is pipelines at the top.
(2) between
the valve flange and pipe flange design by piping installed gasket.
(3) bolts
on the flange to be symmetric, successive, evenly tightened.
(4) Connect air
line
3 Installation check
(1) drive
start operation, closed ball several times, should be flexible without Zhise,
confirmed it is working.
(2) design requirements by pipeline between the pipe
and valve sealing Flange for inspection.
