Today, there are more and more products and models of valves. Among many valve products, the use frequency of pneumatic butterfly valve and gate valve is the most prominent. Many users do not know what the difference between gate valve and butterfly valve is, but do not know how to select these two valves. Therefore, it is very important to understand the difference between butterfly valve and gate valve.

Disassembly and assembly methods and precautions of cylinder block First remove the cylinder from the valve body, first remove the covers at both ends of the cylinder, and when removing the piston, pay attention to the direction of the piston rack, then use external force to rotate the cylinder shaft clockwise to make the piston move to the outside, and then slowly vent the valve closing hole to gently eject the piston with air pressure, but this method must pay attention to slow ventilation, Otherwise, the piston will suddenly eject, which is a bit dangerous! Then remove the circlip on the cylinder shaft, and the cylinder shaft can be taken out from the other end. Then each part can be cleaned and greased. The parts to be greased are: cylinder inner wall and piston seal ring, rack and back ring piece, as well as gear shaft and seal ring. After adding lubricating grease, install it in the order of disassembly and in the reverse order of position. Pay attention to the position of the gear rack. Make sure that the end groove of the gear shaft is parallel to the cylinder block when the piston retracts to the inside position when the valve is opened, When the valve is closed, that is, when the piston extends to the outside, the end groove on the gear shaft is vertical to the cylinder block.