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Installation Instructions And Procedures For Clamped Soft Seal Butterfly Valve.

Sep 03, 2019

Butterfly Valve 


Definition

     The clamping butterfly valve is one of the most common valves in the industrial pipeline. The structure of the clamping butterfly valve itself is relatively small. The fluid medium of the pipeline can be controlled by putting the butterfly valve into the middle of the flange at both ends of the pipe, passing through the pipe flange with double head bolts and locking the clamping butterfly valve. For the clamping butterfly valve, it is especially suitable for the place where the space is narrow or the distance between the pipes is short. When the butterfly valve is in the completely open position, the thickness of the butterfly plate is the only resistance when the medium flows through the valve body, so the pressure drop produced by the valve is very small, so it has good flow control characteristics.


Explain the butterfly valve before installation:

1. Before the installation begins operation, spray with air to remove the outer objects on the piping, and clean the inner surface of the piping with clean water.

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

3.check the valve passage and sealing surface if there is debris, and remove 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.special butterfly flange must be used for clamping butterfly valve.

6.the electric butterfly valve can be installed on any angle of the pipe, in order to maintain the convenience, it is recommended not to install upside down. 

7.the butterfly valve flange disk must be installed to ensure that the flange surface and sealing rubber pair, the screw must be evenly tightened, the sealing surface must be fully closed; if the screw tightening strength is uneven, rubber protruding will hold the butterfly plate, or resist the butterfly plate to cause leakage at the valve stem.


The installation procedure of the clamp type butterfly valve:

the correct installation of the clamp type butterfly valve is related to the sealing degree of the butterfly valve, and the problems such as the leakage and the like can not be solved, including the safety in the working condition operation, and the user should know the installation process.

1.Place the valve between the two pre-installed flanges and pay attention to the neat alignment of the bolt holes.

2.The bolt nuts are gently inserted into the flange hole, and the nuts are slightly tightened to correct the flatness of the flange surface.

3.The flange is fixed to the pipe by spot welding.

4. Remove the valve.

5. Fix the flange completely on the pipe.

6. Wait for the weld to cool before installing the valve. Ensure that the valve has enough moving space in the flange to prevent valve damage and that the valve plate has a certain opening.

7. Correct the position of the valve and tighten the four pairs of bolts.

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. Tighten all the nuts with cross-equalization.

10.reconfirm that the valve can be opened and closed freely, note: make sure the valve plate does not touch the pipe.


Focal point 

The installation of clip butterfly valve must be flat before installation, remember not to knock at will, in the installation of it into the installation length, in the field pipeline design, without special permission is not allowed to remove the clip butterfly valve at will, this is what we should know before installation. At the same time, we also need to know that the clip butterfly valve can be installed in any position, but after the installation of the clip butterfly valve, it is necessary to lay the butterfly valve along the line and make a support for the clip butterfly valve. Once the support is made, it is strictly prohibited to remove the support when in use.