How to carry out construction work in the installation of three-piece all-inclusive ball valve?
Be careful in installation and construction, do not hit the valve made of brittle material.
Before installation, the valve should be inspected to check the specifications and models to identify whether there is damage, especially for the valve stem. Turn it a few times to see if it is skewed, because it is easy to hit the valve stem during transportation. Also remove debris from the valve.
When the valve is lifted, the rope should not be tied to the handwheel or valve stem to avoid damage to these parts, and should be tied to the flange.
For the pipeline connected to the valve, be sure to clean it. Compressed air can be used to blow off iron oxide filings, mud sand, welding slag and other debris. These debris not only easily scratch the sealing surface of the valve, but also block the small valve and make it invalid. When installing the screw valve, the sealing packing (line hemp plus aluminum oil or PTFE raw material tape) should be wrapped on the pipe thread, and do not get into the valve, so as to avoid accumulation in the valve and affect the flow of the medium.
When installing the three-piece all-inclusive ball valve, pay attention to tightening the bolts symmetrically and evenly. The valve flange is parallel to the pipe flange, and the clearance is reasonable to avoid excessive pressure or even cracking of the valve. Special attention should be paid to brittle materials and valves with low strength. Valves that must be welded to the pipe should be spot welded first, then the closing parts should be fully opened, and then welded to death. The above are the precautions for the construction of the three-piece all-inclusive ball valve.