What are the steam pressure reducing valve working principle and installation method of use? Steam pressure reducing valve working principle is as follows: the working principle of the pressure reducing valve, steam pressure reducing valve is through the opening and closing of throttling, reduced the inlet pressure to a needed discharge pressure, and make the outlet pressure remained stable. Steam pressure reducing valve factory, adjust the spring is in the uncompressed state, at this time the main valve disc and pay a disc in the closed state, when used according to clockwise to adjust screw, compression adjusting spring, make the membrane valve open move pay disc, medium by a hole by paying the seat to b holes into the piston above, the piston under the action of medium pressure, leaving the move down to promote the main valve seat valve, make the medium flow valve. By c below the hole into the diaphragm at the same time, when the valve after pressure more than the setting pressure, push the diaphragm up regulating spring compression, pay the disc to close the direction, then reduce flow into the piston at the top of the medium, pressure drops, also at this time the main valve disc on the main valve disc spring force to push down, the clearance of the main valve disc and the main seat is reduced, the medium flow rate is less, also make the valve after pressure drops to a new equilibrium, whereas when the valve after pressure is lower than the set pressure, the main valve disc and the main seat clearance increases, the medium flow rate also will increase, make the valve after pressure is increased to a new equilibrium. The steam pressure reducing valve shall generally be installed in the pipeline. Steam pressure reducing valve is a necessary accessories, pneumatic control valve of the main effect is to origin, pressure relief and stability to a fixed value, so that the regulator can obtain stable gas source power for regulating control. The steam pressure reducing valve after work by the valve pressure control. Increased when pressure sensor detected indicator for pressure of the valve, pressure reducing valve valve opening decreased; When the detected after the relief valve pressure decreases, and increase pressure reducing valve valve opening, in order to meet the control requirements. The steam pressure reducing valve - — The valve must be in a certain extent than value is higher than the system; Even in the maximum or minimum flow, it should also be able to respond to positive action and reaction control signal. These valves should be useful for control range, the maximum flow of 20% to 80%. Normal is geometric model or geometric characteristics. These types of a proportional control valve itself demands the best flow characteristics and flow range. Steam pressure reducing valve is suitable for water, steam, air medium pipeline, by adjusting the lower the inlet pressure to a needed discharge pressure, when the inlet pressure and flux change, by the energy of the medium itself automatically maintain export pressure within a certain range, but the difference between the inlet pressure and outlet pressure must be zero or more. 2 mpa/CM to understand the working principle of the steam pressure reducing valve, after its installation considerations will be easier to understand: the porv Y43H - 16, with 0. 05 ~ 0. 4 mpa, Y43H - 25, equipped with 1 ~ 1. 6 mpa, Y43H - 40, equipped with 1 ~ 1. 6 mpa, 1。 6 to 2. 5 mpa adjusting spring, Y43H - 64, equipped with 1 ~ 3 mpa adjusting spring, the factory equipped with 0 in the valve. 1 ~ 1 mpa, spring, with the rest with the valve, the user can according to the amount of export pressure value options. In steam pressure reducing valve before for piping system must rinse clean. Into the valve to prevent welding slag, scale and other stolen goods, affect the valve work normally. Steam pressure reducing valve should be installed in the place where is convenient for operation and maintenance, erect and must be installed in horizontal pipe runs, should pay attention to the medium inside the pipeline flow in line with the direction indicated by the arrows on the valve body, do not reverse. Pressure reducing valve used in installation, should open the by-pass pipe cut-off valve, expel a mixture of condensed water and soda in line, in case the relief valve opens to produce water there is damage to the pressure reducing valve, when no abnormal phenomenon, slowly turn adjusting screw clockwise, the outlet pressure to set the desired pressure ( The table after the valve pressure shall prevail) , after the adjustment, the lock nut back tightly, screw on guard. Pressure reducing valve should be installed before the filter, debris into the pressure reducing valve, in case the medium influence its performance. Should have a straight pipe before and after the installation of the pressure reducing valve, valve in front of the straight pipe length is about 600 mm, the Industrial Valves after the straight pipe length is about 1000 mm. General relief valves require import and export pressure difference must be zero or more. 2Mpa。 Pressure reducing valve usually have (~ DN100 wait for a variety of specifications, the valve before and after work pressure respectively & lt; 5 mpa, regulating range of error is plus or minus 5% ~ 10%.
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