Buried ball valve preparation before installation

2019/1/2 16:42:17

Confirm the preparation of the buried ball valve before installation:


1. Ensure that the buried ball valve installation position is in the coaxial position. The two flanges on the pipeline should be kept parallel. Confirm that the pipeline can withstand the weight of the ball valve. If the pipeline can not bear the weight of the ball valve, install the pipeline for the pipeline before installation. Support.


2. Confirm whether there are impurities, welding slag, etc. in the pipeline, and the pipeline must be purged.


3. Check the nameplate of the ball valve, and operate the buried ball valve fully open and closed several times to confirm that the valve can work normally, and then thoroughly check the details of the valve to ensure that the valve is intact.


4. Remove the protective cover at both ends of the valve, check whether the valve body is clean, and clean the valve body cavity. Since the sealing surface of the ball valve is spherical, even small debris may cause damage to the sealing surface.


Second, the installation of buried ball valve


1. Any part of the ball valve can be installed at the upstream end. The handle ball valve can be installed at any position of the pipeline. If the ball valve of the actuator (such as gearbox, electro-pneumatic actuator) is configured, it must be installed vertically. In the horizontal position. Http://


2. Install a gasket between the ball valve flange and the pipeline flange according to the pipeline design requirements.


3. The bolts on the flange should be tightened symmetrically, successively and evenly.


4. If the ball valve adopts pneumatic, electric and other actuators, follow the instructions to complete the installation of the air source and power supply.


Third, the inspection of the buried ball valve after installation


1. After the installation is completed, start the ball valve to open and close several times, it should be flexible, the force is even, and the ball valve works normally.


2. According to the design requirements of the pipeline pressure, the sealing performance of the joint surface between the ball valve and the pipe flange is detected after the pressure is applied.