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Hydraulic control valve installation and removal steps
Hydraulic control valve installation Hydraulic control valve should be installed horizontally. When installed horizontally, the bonnet should be upward. After the fire water supply system valve should have drainage facilities. Automatic sprinkler system needs decompression, the pressure relief valve should be set before the alarm valve (along the flow direction), with a single alarm valve supporting the setting of the valve, not equipment with pressure relief valve; with multiple alarm valve package Set the pressure relief valve, valve should be used plant equipment. For the hot water supply project of the valve, should be used hot water valve. The use of dry pipe dry pipe circulation mode (half-cycle mode) hot water supply project, reducing valve set requirements should be the same with the cold water project; the use of vertical pipe circulation mode (full circulation mode) hot water supply project, the relief valve should be set To prevent the destruction of hot water cycle, the district back to the pressure in the convergence point should be balanced. Hydraulic control valve main valve disassembly Hydraulic control valve The main valve is a self-lubricating water valve body, without additional oil lubrication, in case of damage to the main valve components, according to the following instructions for disassembly. (Note: The general consumption of damage within the valve products for the diaphragm and â—‹ ring, other internal parts little damage) 1. The main valve before and after the end gate valve closed. 2. Release the pipe fitting screw on the main valve cover to release the pressure in the valve. 3. Remove all screws, including the nuts of the necessary brass in the control line. 4. Take the valve cover and spring. 5. The axis, diaphragm, piston and other removed, do not damage the diaphragm. 6. After the above items are removed, check the diaphragm and â—‹ ring is damaged; if no damage do not subcontract their own internal components. 7. If it is found that the diaphragm or o-ring is damaged, please loosen the nut on the shaft core, break out the diaphragm or ring by Zhejiang, and then replace it with a new diaphragm or o-ring. 8. A detailed examination of the main valve internal valve seat, shaft and other damage if any other debris in the main valve to clean it out. 9. In reverse order is the replacement of the main components of the valve assembly, pay attention to the phenomenon of the valve can not be jammed.