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What conditions should be met when installing the wafer type gas butterfly valve

2018-09-11

The butterfly plate of the wafer butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical passage of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is 0 °-90 °, which can play the role of flow regulation. When the butterfly plate rotates to 90 °, the valve reaches the maximum opening. The installation conditions of wafer type gas butterfly valve are introduced as follows;

Structure diagram of wafer type gas butterfly valve

1. First of all, it should be installed according to the flow direction of the medium;

2. Before installation, the material and model of the valve must be carefully checked to see if they meet the requirements of pipeline use, and clean them after verification. Valves that are not installed and used should be stored in a dry room. Valves that have been kept for a long time should be provided with oil, moisture and rust prevention measures.

3. When installing the butterfly valve, it is advisable to use the butterfly plate in the closed position to prevent debris from entering the valve cavity and rubbing the sealing surface.

4. Before the valve is used, the welding slag and debris in the pipeline should be fully cleaned.

5, the butterfly valve and the pipeline between the need to install a gasket, bolt installation connection, should be tightened in the direction of the diagonal multiple times, not a single tightening, to prevent uneven force caused by the flange connection leakage.

6. When the valve is connected to the pipeline, it is required to use butt welding steel flanges or special flanges for butterfly valves on the pipeline. If a flat welded steel flange is used, the flange inner hole must be as large as the gasket inner hole to ensure the effective sealing surface of the gasket.

wafer type gas butterfly valve

7. The opening and closing stroke of the control mechanism has been adjusted when the electric butterfly valve leaves the factory. In order to prevent the wrong phase sequence of the power supply, the user should manually open the valve to the middle position before switching on the power supply to ensure that the opening and closing direction of the valve is consistent with the motor control direction.

The wafer butterfly valve is simple in structure, small in size and light in weight, and consists of only a few parts. And only need to rotate 90 ° to quickly open and close, simple operation, while the valve has good fluid control characteristics.