1. Hard seal butterfly valve in the use process, should always keep clean, transmission thread must be regularly lubricated, found fault, should be immediately stopped use, to identify the cause of clear failure.
2. Packing gland bolts should be evenly tightened, should not be pressed into a crooked state, so as to avoid injury to prevent stem movement or cause leakage.
3. installation, the valve can be connected directly to the tube on the way. Under normal circumstances, can be installed in the pipeline at any location, but to facilitate the operation of the overhaul, note that the cut-off valve media flow should be the vertical disc below the upper, lift check valve can only be installed horizontally.
4. Hard seal butterfly valve use, only for full open or closed, do not allow to adjust the flow to avoid the sealing surface by erosion, accelerated wear. The gate valve and the upper threaded globe valves have a reverse sealing device, and the handwheel is screwed to the top position to prevent the media from leaking from the stuffing.
5. The Hard seal butterfly valve opens, closes the application handwheel, does not use the lever or other tool, lest damages the valve piece. The handwheel rotates clockwise to turn off and the reverse is turned on.
6. Before installation, we must carefully check the pressure of the valve mark, whether the path meets the requirements of the use, eliminate the defects caused by the transportation process and remove the fouling of the valve parts.
7. Long-term storage valves should be inspected regularly, on the exposed surface of the processing should be kept clean, remove dirt, storage ball valve should be blocked at both ends and in the open state, pneumatic butterfly valve, the two ends of the channel should be plugged and in a closed state, neatly stored in the indoor ventilation and dry place, is prohibited from stacking or open storage.