As the country increases the construction of infrastructure, the demand for valves is increasing, especially the demand for manual butterfly valves is increasing day by day. The manual butterfly valve, as its name suggests, is a butterfly valve that requires manual manual operation, and is different from a manual butterfly valve in that it is a pneumatic butterfly valve and an electric butterfly valve. The operation of the manual butterfly valve has two kinds of handles and turbines. Their operation is very simple, but recently found that some friends still do not quite understand the steps of using the manual butterfly valve. So this article, we help this part of the friend to familiarize with the operation of the manual butterfly valve.
The manual butterfly valve is a valve with a very simple structure, and its components mainly include a valve body, a valve stem, a butterfly plate, a valve seat, and a drive device. Manual butterfly valve drive is the handle or the turbine head. Handle butterfly valves can be divided into hand-operated butterfly valves and worm gear operated butterfly valves, so we also need to separate the use of the switch steps.
Switch steps of handle butterfly valve
The switch of the handle butterfly valve needs to be achieved manually by pulling the handle, because the butterfly valve can be used to cut off and can also be used to regulate the flow. A gear is directly between the handle and the valve body. When the handle is pulled to both sides, the butterfly valve is In the fully open or fully closed state, the butterfly valve is used to cut off. When the handle is pulled to stop at a certain position above the gear, the butterfly valve is used to regulate the flow.
The switch position of the handle is parallel to the butterfly plate. A valve rod connects the two in the middle, and the handle of the handle butterfly valve is pulled. The handle drives the valve stem to move, and the valve stem will drive the butterfly plate to rotate to achieve the opening and closing of the butterfly valve. The rotation angle is between 0-90°.
Switch use steps of worm gear operated butterfly valve
The switch of the worm gear operated butterfly valve also needs to be realized manually. Unlike the handle butterfly valve, the worm gear operated butterfly valve is operated by the worm wheel. The same as the handle butterfly valve, the butterfly plate and the worm head of the worm gear operated butterfly valve are directly connected by the valve stem.
The use procedure of the worm gear operated butterfly valve is to turn the hand wheel on the worm head, turn it counterclockwise, turn it clockwise, turn the hand wheel, drive the valve stem through the gear in the turbine device, and the valve stem drives the butterfly plate to rotate. , to achieve the effect of opening and closing.