Daily maintenance work of wafer hard seal butterfly valve

Routine maintenance of the butterfly valve with hard seal the butterfly valve with hard seal is a valve which can open or close the pipeline by the rotation of the round butterfly plate (sealing part) with the valve shaft It is mainly used as a block valve and can also be designed to have the function of cut-off and throttling adjustment At present, the use of clamping hard sealing butterfly valve in low pressure and large and medium diameter pipeline is increasing However, due to the multi-layer hard and soft laminated seal ring fixed on the valve plate, when the valve plate is normally open, the media will form a positive flushing on its sealing surface, and the soft sealing belt in the metal sandwich will directly affect the sealing performance Therefore, it is necessary to do a good job in the normal maintenance of the clamping hard sealing butterfly valve Maintenance method: 1 During the use of the hard seal butterfly valve, it should be kept clean frequently The transmission thread must be lubricated regularly In case of any fault, it should stop using immediately and find out the cause to clear the fault 2 The bolts of the packing gland shall be tightened evenly, and shall not be pressed into a skew state, so as to avoid being damaged and hindering the stem movement or causing leakage 3 During installation, the valve can be directly installed on the pipeline according to the connection mode In general, it can be installed at any position of the pipeline, but it needs to be convenient for operation and maintenance Note that the medium flow direction of the stop valve should be upward under the longitudinal valve disc, and the lift check valve can only be installed horizontally 4 When the clamping hard sealing butterfly valve is used, it is only used for full opening or full closing, and it is not allowed to adjust the flow, so as to avoid erosion of the sealing surface and accelerated wear The gate valve and upper thread stop valve are provided with back sealing device, and the hand wheel is screwed to the upper position of Zui to prevent the medium from leaking from the packing 5 Hand wheel shall be used when opening and closing the clamp hard seal butterfly valve Do not use lever or other tools to avoid damaging the valve parts Turn the hand wheel clockwise to close, otherwise to open 6 Before installation, carefully check whether the pressure and diameter of the valve mark meet the use requirements, eliminate the defects caused by the transportation process, and eliminate the dirt of the valve parts 7 Valves stored for a long time shall be inspected regularly Exposed processing surfaces shall be kept clean and dirt shall be removed During storage, ball valves shall be blocked at both ends and in the open state Pneumatic butterfly valves and channels shall be blocked at both ends and in the closed state They shall be stored in a dry and ventilated place indoors Stacking or outdoor storage is strictly prohibited.