1. When installing the valve, it is necessary to clean the inner cavity and sealing surface, whether the connecting bolt is evenly tightened, and check whether the packing is compressed.

2. The valve is closed during installation.

3. Large gate valves and pneumatic regulating valves should be installed vertically, so as not to bias to one side due to the large dead weight of the spool, which will produce leakage.

4, a set of correct installation process standards.

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 medium flow and the arrow marked on the valve body, not often open and close and need to strictly ensure that the valve is not leaked in the closed state, you can reverse installation, with the aid of medium pressure to close it.

7. When tightening the pressing screw, the valve should be in a slightly open state to avoid damaging the sealing surface of the valve top.

 8. Low temperature valve should be opened and closed in cold state as far as possible before positioning, requiring flexibility without jamming phenomenon.

9. The liquid valve should be configured with a 10° inclination Angle between the valve stem and the level to avoid liquid flowing down the valve stem and, more seriously, to avoid leakage.

10. After naked cooling, the large air separation tower pre-tightens the connecting valve flange once in the cold state to prevent leakage at normal temperature and leakage at low temperature.

11. It is strictly prohibited to climb the valve stem as scaffolding during installation.

12. After all valves are in place, they should be opened and closed again, and it is qualified to be flexible without jamming.

13. Valves should generally be positioned before pipeline installation. Pipe distribution should be natural, the position is not hard pull, so as not to leave prestress.

14, non-metallic valves, some hard and brittle, some low strength, operation, opening and closing force can not be too large, especially can not make strong. Also take care to avoid the object bump.

15. When handling and installing valves, beware of bumps and scratches.

16. When the new valve is used, the packing should not be pressed too tightly, so as not to leak, so as not to press the stem too much, accelerate the wear and tear, and the opening and closing effort.