Frequently Asked Questions about Valve Installation

 

1. When the valve is installed, the inner wall and convex surface must be cleaned, whether the connecting screws are evenly tightened, and check whether the packing is tight.

 

2. The valve during installation is in a closed state.

 

3. Large-sized globe valves and self-operated regulating valves should be installed horizontally to prevent the valve core from being biased due to the relatively large weight of the valve core, which will cause leakage.

 

4. There is a set of proper installation procedure specifications.

 

5. The valve should be installed according to the allowable working position, but attention should be paid to the convenience of maintenance and operation.

 

6. The installation of the shut-off valve should be consistent with the arrow symbol marked on the hydraulic valve with the material inflow. For the valve that is not frequently opened and closed but must be strictly ensured that it does not leak when it is closed, it can be installed in reverse to use the material to work. The pressure closes it tightly.

 

7. When tightening the clamping screw, the valve should be slightly open to prevent the top surface of the valve from being crushed.

 

8. Before accurate positioning, the ultra-low temperature valve should be opened and closed in a hot state as much as possible, and it is required to be flexible and not stuck.

 

9. The liquid valve should be equipped with a 10° inclination angle between the valve stem and the level to prevent the liquid from being discharged along the valve stem, and more obviously to prevent leakage.

 

10. After the large and medium-sized air separation towers are bare-cooled, torque the flange of the connecting valve once in a hot state to avoid the situation that water does not leak at normal temperature but leaks at lower temperature.

 

11. It is forbidden to climb the valve stem as a steel pipe scaffold during installation.

 

12. After all the valves are in place, they should be opened and closed again, and the flexibility and no stuck state are up to the standard.

 

13. The valve should generally be accurately positioned before the pipeline is installed. Of course, the pipeline should be of course, and the part should not be pulled hard, so as to prevent the prestressed steel bars from being left.

 

14. Some non-metallic material valves are hard and brittle, and some have low compressive strength. In actual operation, the opening and closing force should not be too large, especially when it is not violent. Also need to pay attention to avoid the target bump.

 

15. When transporting and installing the valve, it is necessary to strictly prevent the safety accident of bumping, bumping and scratching.

 

16. When the new valve is used, the packing does not need to be pressed too tightly, so as not to leak water, in order to prevent the valve stem from being too stressed, accelerated damage, and laborious to open and close.

 

17. Before installing the valve, make sure that the valve complies with the regulations and relevant specifications.

 

18. Before installing the valve, the inside of the pipeline should be cleaned to remove the iron pins and other residues to avoid the valve sealing seat getting dirty.

 

19. The high temperature valve is installed at room temperature. After application, the temperature rises, the anchor bolts are deformed by heat, and the gap increases. Therefore, it must be tightened again. Pay special attention to this problem, otherwise it is very easy to leak.

 

20. When installing the valve, it is necessary to determine whether the material inflow, the installation method and the main shaft position can meet the requirements.

 

The above are the common problems in valve installation, and we look forward to giving some help to friends who need it.