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Replacement and installation of directly buried all welded ball valve

Release date: August 22, 2019

Directly buried All welded ball valve replace

The directly buried welded ball valve is installed under the ground. According to its installation method and characteristics, the buried welded ball valve has a long service life and is not easy to be damaged. However, as time goes on, valves of good quality need to be replaced for safety reasons. So, how to replace buried valve with directly buried welded ball valve?

For some valves installed on the ground pipeline, the medium in the pipeline stops and can be removed according to this method.

 Directly buried all welded ball valve

For buried welding ball valve, the method clearance is not very large. There are only two steps, that is, the buried ball valve buried in the ground is exposed.

After a certain amount of cleaning, it can be disassembled according to the ordinary valve method. The specific arrangement method is as follows:

Installation method of directly buried all welded ball valve

In the installation of direct buried type All welded ball valve We need to pay attention to the following items:

1. Hoisting. In order to protect the valve rod, the hoisting method of ball valve should be correct. Do not fasten chain on handwheel, gearbox or actuator. Before welding, the protective caps at both ends of the sleeve of the ball valve can not be removed.

Buried long rod welded ball valve

2. Welding. When welding the joint of buried welded ball valve and main pipeline, the quality of weld shall meet the standard specified in the instruction manual. Generally speaking, the first welding is not fully qualified. Therefore, when ordering the valve, the manufacturer should add 1 meter long sleeve pipe at both ends of the valve, so that the first welding seam can not be qualified There is enough length to cut the first weld for the second welding. It should be noted that when welding, the valve is required to be in the full open position, and the temperature of the seal in the valve shall not exceed 140 ℃.

3. Valve well masonry. After the buried valve is buried in the outside of the well, it is required to install the valve on the outside of a buried well.


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