The plan of 17-4PH steel valve seat is shown in the figure. The routine processing procedure shall be blank forging solution treatment, rough processing, aging treatment and finishing. In order to reduce manufacturing costs, aging treatment can be carried out before rough machining, that is, solution and aging treatment are carried out continuously, and rough machining and finish machining are carried out continuously. The workpiece is processed by the rough machining and finishing process of billet forging solution treatment and aging treatment. The processing sequence is ① rough turning the internal and external dimensions, and 2mm allowance is reserved at the R162mm ball. ② Finish turning to complete the size of each part, and the ball R162mm leaves grinding allowance. ③ Rough grinding and fine grinding complete R162mm ball size processing.

When installing the stainless steel pneumatic butterfly valve, we will definitely use the connection of the product. The connection of the stainless steel pneumatic butterfly valve is related to whether the connection is stable. Here we will talk about the precautions when using the stainless steel pneumatic butterfly valve connection device.
2. When installing the device, first unscrew the connectors at both ends, and then install the connectors on the supply and return water pipe interfaces of the fan coil unit, which should be sealed and tightened.
3. When the soft joint of stainless steel pneumatic butterfly valve stops pre bending, the looper nut shall be placed at both ends of the corrugated soft joint to prevent the nut from being stuck when the corrugated pipe is bent.
4. Be careful not to collide with hard objects or damage the sealing surface during installation.
5. The other end of the stainless steel flexible joint on the pipeline away from the vibration source shall be effectively fixed so that the flexible joint can isolate and absorb vibration.
6. When the electric welding operation is stopped at the construction site, the bellows shall be effectively protected to avoid splashing of welding slag on the bellows.
7. Stainless steel flexible joints must be installed in a straight line without bending or translation.
8. After the device is completed, the nut and spare nut on the pull rod shall be locked, and the pull rod and nut shall not be removed.
9. The medium used shall not be corrosive to the corrugated pipe data, and the chloride ion content in the medium shall be ≤ 25PPM10. The product length can be properly adjusted with the pull rod when the device is installed, and the adjustment amount shall not be greater than the rule.