Explain the installation steps of pneumatic PP to the butterfly valve

Explain the installation steps of pneumatic PP to the butterfly valve

Pneumatic PP on the butterfly valve is one of the common valve types in the industrial pipeline. The pneumatic PP clamp butterfly valve itself has a relatively small structure. It is only necessary to put the butterfly valve into the middle of the flange at both ends of the pipe and use the stud bolt to pass through the pipe method. The blue and pneumatic PP pair of butterfly valves are locked to control the fluid medium in the pipeline. The pneumatic PP-ply butterfly valve is especially suitable for places with narrow space or short distance between pipes. When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is Very small, so it has better flow control characteristics.

First, the pneumatic PP to the butterfly valve before installation instructions:

1. Before the installation starts, use the air spray to remove the foreign objects on the piping, and clean the inside of the piping with clean water.

2, carefully check whether the valve usage is consistent with its performance specifications; (temperature, pressure)

3. Check the valve passage and sealing surface for any debris and remove it in time;

4. The valve should be installed in time after opening the box. Do not loosen any fastening screws or nuts on the valve at will;

5, pneumatic PP to the butterfly valve must use a dedicated butterfly valve flange.

6. The electric butterfly valve can be installed on the pipe at any angle. For maintenance convenience, it is recommended not to install it upside down.

7. When installing the butterfly valve flange, ensure that the flange surface and the sealing rubber are centered, the screws are evenly tightened, and the sealing surface must be completely attached; if the screw tightening force is uneven, the rubber protrusion will catch the butterfly board, or the top The butterfly plate causes a leak at the stem.

Second, the pneumatic PP pair butterfly valve installation steps:

The correct installation of the pneumatic PP pair butterfly valve is related to the sealing degree of the butterfly valve, and whether it will leak, etc., including the safety in the working condition, and the user should understand the installation process.

1. Place the valve between the two pre-installed flanges. Note that the bolt holes are aligned.

2. Gently insert the four pairs of bolts and nuts into the flange hole, and tighten the nut slightly to correct the flatness of the flange surface;

3. Fix the flange to the pipeline by spot welding;

4. Remove the valve;

5. The flange is completely welded and fixed on the pipeline;

6. Install the valve after the weld is cooled. Ensure that the valve has sufficient space in the flange to prevent the valve from being damaged and to ensure a certain degree of opening of the valve plate;

7. Correct the valve position and tighten the four pairs of bolts (be careful not to overtighten)

8. Open the valve to ensure that the valve plate can be opened and closed freely, and then the valve plate is slightly opened;

9. Cross-balance equalize all nuts;

10. Re-confirm that the valve can open and close freely. Note: Make sure the valve plate does not touch the pipe.

Pneumatic PP on the butterfly valve installation must first be placed flat before installation, remember not to bump at random, after the installation to pull it into the length of the installation, in the design of the on-site pipeline, without special permission is not The pneumatic PP-pair butterfly valve can be dismantled at will, which we know before installation. At the same time, we must also know that the pneumatic PP pair butterfly valve can be installed in any position, but after the pneumatic PP pair butterfly valve is installed, it is necessary to lay a butterfly valve along the line, and make a bracket for the pneumatic PP to the butterfly valve, and once the bracket is made, It is strictly forbidden to remove the bracket when it is used.