Hard sealed butterfly valve

Hard sealed butterfly valveThe structure is simple, the volume is small, and the weight is light, consisting of only a few parts. And it only needs to rotate 90 ° to quickly open and close, with simple operation. At the same time, this electric valve has good fluid control characteristics. When the butterfly valve is in the open position, the thickness of the butterfly plate is the resistance of the medium flowing through the valve body, so the pressure drop generated by this valve is very small, which has good flow control characteristics. Butterfly valves have two sealing types: elastic sealing and metal sealing. Elastic sealing valve, the sealing ring can be embedded on the valve body or attached around the butterfly plate.

Hard sealed butterfly valvemaintenance

1. Butterfly valves should be kept clean regularly during use, and the transmission threads must be lubricated regularly. If a malfunction is found, the use should be stopped immediately, and the cause should be identified and the malfunction cleared.

2. The bolts of the packing gland should be tightened evenly and should not be pressed into a crooked state to avoid collision, obstruction of valve stem movement or leakage.

3. During installation, the valve can be directly installed on the pipeline according to the connection method. In general, it can be installed at any position in the pipeline, but it needs to be easy to operate and maintain. Note that the flow direction of the shut-off valve medium should be upward from below the longitudinal valve disc, and the lift check valve can only be installed horizontally.

4. When using butterfly valves, they should only be fully open or fully closed, and are not allowed to be used for regulating flow to avoid erosion of the sealing surface and accelerated wear. Gate valves and threaded globe valves have reverse sealing devices inside, and the handwheel can be tightened to the topmost position to prevent medium leakage from the packing.

5. When opening and closing butterfly valves, use a handwheel and do not use levers or other tools to avoid damaging the valve components. Clockwise rotation of the handwheel is considered closed, while counterclockwise rotation is considered open.

6. Before installation, it is necessary to carefully check whether the pressure and diameter marked on this valve meet the usage requirements, eliminate defects caused by transportation, and remove dirt from the valve components.

7. Valves stored for a long time should be regularly inspected, and the exposed processing surfaces should be kept clean and free of dirt. During storage, the ball valve should be blocked at both ends and in an open state, and the pneumatic butterfly valve and channel should be blocked at both ends and in a closed state. They should be neatly stored indoors in a ventilated and dry place, and stacking or outdoor storage is strictly prohibited.