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.

Five Elements of Pneumatic Butterfly Valve Selection
Rubber and Plastic Products Co., Ltd. told us about the five elements of pneumatic butterfly valve selection and the knowledge points about the classification of stainless steel pneumatic butterfly valves (1) the nominal diameter of the size hose. Xingda informed us to select the connector type (mainly flange connection, thread connection, quick connector connection), the size of the pneumatic butterfly valve, and the length of the hose.
(2) Xingda introduced the pressure demand based on the practical working pressure of the hose, and then inquired about the nominal diameter and pressure gauge of the corrugated pneumatic butterfly valve. Only then could it decide whether to use the stainless steel mesh type pneumatic butterfly valve.
(3) For the chemical properties of the medium recommended in the medium hose, we Xingda determine the material of each part of the hose according to the corrosion resistance of the hose material.
(4) The working temperature and range of the medium in the temperature hose; Ambient temperature when the hose is working. In case of high temperature, it is necessary to confirm the pressure after temperature correction according to the temperature correction coefficient of working pressure under high temperature of pneumatic butterfly valve, so as to ensure the correct pressure level is selected.
(5) State Xingda informed us that according to the state of hose application, referring to the correct application and installation method of pneumatic butterfly valve and the optimal length of high-pressure hose for settlement compensation, the length calculation of various motion states of hose, the minimum bending times and minimum bending radius of hose and other factors, the hose length should be correctly selected and correctly installed.