The assembly process of pneumatic butterfly valve:
1. The appearance of the pneumatic butterfly valve shall be inspected. The rubber shall not have cracks, and the rubber shall not be separated from the metal. The effective time of the pneumatic butterfly valve shall be checked according to the temporary technical regulations provided by the pneumatic butterfly valve;
2. Place the pneumatic butterfly valve on the upper side of the base according to the installation pattern of the pneumatic butterfly valve of the auxiliary machine. Check the bonding condition of the pneumatic butterfly valve and the support surface of the base. It is required that the feeler gauge with a thickness of 0.1 mm cannot be inserted, and the feeler gauge with a thickness of 0.1 mm to 0.2 mm can be inserted in some positions, However, the scope of insertion shall not be greater than 35% of the perimeter of the bottom surface of the pneumatic butterfly valve, and its depth shall not be greater than 20mm;
3. Draw the bolt hole line for fastening the pneumatic butterfly valve on the bearing surface of the base and drill at the same time. Under the condition of relatively large batch, make a sample according to the base of the machinery to be assembled, place the sample on the place required by the bearing surface of the base, draw the bolt hole, and then start drilling. In case of single or small batch, At this time, each pneumatic butterfly valve can be temporarily installed on the base of the auxiliary machine, and then the auxiliary machine and the pneumatic butterfly valve can be lifted to the base together. After the position of the pneumatic butterfly valve is correctly placed according to the provisions of the drawing, draw a line on the base according to the fastening bolt holes on the pneumatic butterfly valve, and then lift the auxiliary machine and the pneumatic butterfly valve together, and punch holes on the base;
4. Fasten the pneumatic butterfly valve on the base with the fastening bolts;
5. Lift the auxiliary machine and lift it to the required height point with a jack or jacking screw. Measure the distance between the plane on the sleeve of the pneumatic butterfly valve and the base. Its specification should be more than twice the diameter of the fastening bolt.