Maintaining several points of hydraulic control valves

Hydraulic control valve to maintain a few points: 1. The first main hydraulic control valve before and after the end valve closed. 2. The main hydraulic control valve cover piping joint screws loosen and release the pressure in the valve. 3. Remove all the screws, including the line of control nut necessary copper. The water force control valve cover and spring. 5. Place the shaft, the diaphragm, and piston removed, not to damage the diaphragm. 6. After removing all the things above, check the diaphragm and ○ - ring is damaged; Do not be divided if no damage its own internal parts dispute. 7. If found hydraulic control valve diaphragm or ○ - ring is damaged, the nut on the shaft core set loose by Zhejiang decomposition patch or ring, again put on a new patch after removing or ○ - ring . 8. detailed view inside the main valve hydraulic control valve, shaft and other damage, if other debris inside the main valve to clean out.