Overview of hydraulic control valve

The pilot valve acts on the change of water level and pressure as the control object Because there are many kinds of pilot valves, they can be used alone or in combination, so that the main valve can adjust the water level, water pressure and flow separately or in combination But the main valve is similar to the stop valve, when the valve is fully open, its pressure loss is much greater than other valves, and the closer the loss coefficient of each opening is to the full close, the more dramatic the increase, the larger the valve diameter is For the valve with the above characteristics, when it is close to full close, the action of the valve flap accelerates, and water hammer (water impact pressure) is easy to occur When it is close to full close, the slower the action of the valve, the better Therefore, the throttle mechanism can be set on the valve flap In addition, the throttling and action part of the pilot valve should be avoided to set the orifice with extra small diameter as far as possible to avoid blocking If necessary, filter screen shall be added, and bypass pipeline shall be regularly maintained and set The valve has a bright future in development and application Hydraulic control valve is a hydraulic control valve, which consists of a main valve and its attached conduit, pilot valve, needle valve, ball valve and pressure gauge When using hydraulic control valve, first of all, pay attention to the type selection Improper selection will cause water blocking and air leakage When selecting the hydraulic control valve, the water discharge of the hydraulic control valve must be selected by multiplying the hourly steam consumption of the equipment by 2-3 times of the selected ratio as the Zui large condensate In order to ensure that the hydraulic control valve can discharge the condensate as soon as possible during the start-up, and quickly improve the temperature of the heating equipment If the discharge energy of hydraulic control valve is not enough, the condensate will not be discharged in time, which will reduce the thermal efficiency of heating equipment When selecting the hydraulic control valve, the nominal pressure cannot be used to select the hydraulic control valve, because the nominal pressure can only indicate the pressure level of the hydraulic control valve body shell, and the difference between the nominal pressure and the working pressure of the hydraulic control valve is very large Therefore, the discharge of hydraulic control valve should be selected according to the working pressure difference Working pressure difference refers to the difference between the working pressure in front of the hydraulic control valve and the back pressure at the outlet of the hydraulic control valve The selection of hydraulic control valve requires accurate steam blocking and drainage, high sensitivity, high steam utilization rate, no steam leakage, reliable working performance, high back pressure rate, long service life and convenient maintenance Hydraulic control valve is a kind of water self-lubricating valve body, without additional oil lubrication In case of damage of parts in the main valve, please disassemble according to the following instructions (Note: generally, the damaged products in the inner valve are diaphragm and O-ring, and few other internal parts are damaged.) 1 Close the front and rear gate valves of the main valve first 2 Loosen the pipe joint screw on the main valve cover to release the pressure in the valve 3 Remove all screws, including nuts of necessary copper pipes in control pipeline 4 Take out the valve cover and spring 5 Take off the shaft core, diaphragm, piston, etc do not damage the diaphragm 6 After taking out the above items, check whether the diaphragm and O-ring are damaged; if there is no damage, please do not dispute the internal parts 7 If the diaphragm or O-ring is damaged, loosen the nut on the shaft core, disassemble the diaphragm or O-ring one by one, take it out and replace it with a new diaphragm or O-ring 8 Check whether the valve seat, shaft core, etc inside the main valve are damaged in detail If there are other sundries, clean them out inside the main valve 9 Install the replaced parts and components into the main valve in reverse order, and pay attention that the valve cannot be jammed 10 Please refer to installation and operation precautions for reuse Previous valve knowledge: Gate Valve Overview next valve knowledge: control valve overview · characteristics and applicability of solenoid valve May 23, 2009 overview and working principle of steam trap may 22, 2009 ·General overview of butterfly valve may 21, 2009 · overview of plug valve may 21, 2009 ·Overview of drain valve may 21, 2009 Related similar products:
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