Thread Content
1. The valve body of valves is usually made of cast iron, which is brittle; therefore, it should not be subjected to impacts from heavy objects. 2. When moving valves, it is not allowed to throw them around carelessly ； When lifting valves, the rope should be tied to the valve body; it is strictly prohibited to tie it to the handwheel, valve stem, or flange bolt holes. 3. Valves should be installed in locations that facilitate operation, maintenance, and repair; it is strictly prohibited to bury them underground. For valves on pipes buried directly in the ground or in trenches, inspection manholes should be provided to facilitate the opening, closing, and adjustment of the valves. 4. The threads must remain intact and undamaged; hemp should be wrapped around them, lead grease applied, or PTFE tape used. When tightening, a wrench should be used to hold the hexagonal valve body at one end of the pipe in place. 5. When installing flanged valves, be careful to tighten the connection bolts in a diagonal direction, applying even force while tightening to prevent the gaskets from shifting or to avoid deformation and damage to the valve body. 6. The valve should be kept closed during installation. For threaded valves located close to a wall, it is often necessary to remove the valve stem, valve disc, and handwheel during installation in order to turn them. When disassembling, the valve should be kept open by turning the handwheel before proceeding with the disassembly.