1、When installing the valve, you need to clean the inner cavity and sealing surface, whether the connecting bolts are evenly tightened, and check whether the packing is pressed.
2, the installation of the valve is in the closed state.
3, large-size gate valve, pneumatic control valve should be installed vertically, so as not to be biased to one side due to the greater self-weight of the spool, which will produce leakage.
4, there is a set of standards for the correct installation process.
5, the valve should be installed in accordance with the allowed working position, but attention must be paid to the convenience of maintenance and operation.
6, the installation of the globe valve should make the media flow direction and the arrow marked on the valve body, not often open and close and need to strictly ensure that the valve does not leak in the closed state, can be installed in reverse, to make it tightly closed with the help of media pressure.
7, in tightening the compression screw, the valve should be in a slightly open state, so as not to crush the valve top sealing surface.
8, low-temperature valves should be positioned in the cold state before the opening and closing test as far as possible, requiring a flexible no jamming phenomenon.
9, the liquid valve should be configured into the stem and the horizontal into 10 ° angle of inclination, to avoid the liquid flowing down the stem, more seriously to avoid leaks.
10, large air separation tower in the bare cold, in the cold state of the connected valve flange pre-tightened once to prevent leakage at room temperature and leakage in low temperature phenomenon.
11, strictly prohibited in the installation of the valve stem as scaffolding climbing.
12, all valves in place, should be opened and closed once again, flexible and no jamming phenomenon for qualified.
13、Valves should generally be positioned before the pipeline installation. Piping to be natural, the location is not right can not be hard to wrench, so as not to leave pre-stress.
14, non-metallic valves, some hard and brittle, some lower strength, operation, open and close the force can not be too large, especially can not make a strong force. Also pay attention to the object to avoid bumping.
15, in the handling and installation of valves, be careful not to bump and scratch the accident.
16, the use of new valves, packing do not press too tightly to not leak, so as not to pressure the stem too much, accelerate wear and tear, and opening and closing effort.
17、Before installing the valve, confirm that the valve meets the design requirements and relevant standards.
18, before installing the valve, the interior of the pipeline should be cleaned to remove impurities such as iron filings, to prevent the valve sealing seat inclusions of foreign objects.
19, high-temperature valves installed at room temperature, after use, the temperature rises, the bolt heat expansion, the gap increases, so it must be tightened again, this issue needs attention, otherwise it is easy to occur leaks.
20, the installation of the valve to confirm the media flow direction, installation form and handwheel position is in line with the provisions.