Hydraulic control valve is based on the media itself as the power source pipeline pressure, the opening and closing, regulation, the pilot valve and the system of small pipe different combinations, can have nearly 30 kinds of functions, and now gradually get more common use. Pilot valve by the control object as the water level and pressure changes and action, as a large number of pilot valve, can be used alone or in combination, you can make the main valve for water level and pressure and flow, etc., separately or complex adjustment Features. But the main valve is similar to the globe valve, the valve is fully open, the pressure loss is much larger than other valves, and each opening loss coefficient is more close with the full closure, the more drastic increase in valve diameter is more significant. Valve with the above characteristics, near full closure, the valve action is accelerated, prone to water hammer (water impact pressure), close to fully closed, the slower the valve the better, so the valve can be set on the throttle mechanism. In addition, the pilot valve throttling and the action part should try to avoid setting a special small aperture to avoid clogging. If necessary, add filters, regular maintenance and set up by-pass pipeline. This valve development, the use of promising. Hydraulic control valve is a water pressure control valve, which consists of a main valve and attached to the catheter guide pin needle valve ball valve and pressure gauge and other components. The use of hydraulic control valve, we must first pay attention to selection. Improper selection, will cause water and air leakage phenomenon. Selection of hydraulic control valve, the device must be consumed per hour steam multiplied by the selection rate of 2-3 times the maximum condensate, to select the displacement of hydraulic control valve. To ensure that hydraulic control valve in the car as soon as possible to discharge condensate, the rapid increase in temperature of heating equipment. Hydraulic control valve discharge energy is not enough, will cause condensation can not be discharged in time, reducing the thermal efficiency of heating equipment. Selection of hydraulic control valve, the nominal pressure can not be selected hydraulic control valve, because the nominal pressure can only represent the hydraulic control valve body shell to withstand pressure levels, hydraulic control valve nominal pressure and the pressure difference is very large. Therefore, according to the working pressure to choose the hydraulic control valve displacement. Working pressure is the difference between the working pressure before the hydraulic control valve minus the back pressure at the outlet of the hydraulic control valve. The choice of hydraulic control valve requires accurate water vapor barrier, high sensitivity, can improve steam utilization, no leakage of steam, reliable performance, high back pressure, long life, easy maintenance is the preferred conditions. Hydraulic control 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. 10. Please refer to the installation precautions to reuse.
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