product description
YK42F valve operating pressure is controlled by a valve after. When the pressure sensor detects pressure indicator rises to the valve, the valve opens to reduce the pressure reducing valve; when the detected pressure decrease valves, pressure reducing valve opening is increased in order to meet the control requirements. Steam valve valve pressure ratio must be higher than the system value to a certain extent; even at maximum or minimum flow when it should be able to respond to positive action or reaction control signal. These valves should be useful for the control of selection, 20% to 80% that is the maximum flow. Normally geometric pattern or a geometric characteristics. These types of proportional control valve itself has the desired maximum flow characteristics and flow range.
Into the pilot valve piston valve, film type valve, bellows valves, proportional valves, self-operated valve, direct acting piston valve, back pressure regulating valve Wait. They are suitable for different working medium.
Valve works
Different forms have different specific works. But the general principle is: through the valve opening and closing parts of the throttle, the inlet pressure is reduced to the outlet pressure of a need, and outlet pressure remains stable. But generally require import and export pressure relief valve must ≥0.2Mpa.
Valve uses
The valves are suitable for water, steam and air medium pipeline by adjusting the inlet pressure is reduced to the outlet pressure of a need, when the inlet pressure and flow rate changes, by the energy of the medium itself automatically maintain outlet pressure within a certain range, But the difference between inlet pressure and outlet pressure of the must ≥0.2MPA / CM
Valve structure
Valve factory, adjusting spring in an uncompressed state, this time the main valve and the valve is in the closed state pay, clockwise turn the adjusting screw when using compression adjustable spring, the film shifts to open the top flap valve pay, media b made a hole after hole into the top of the piston to pay the seat by the piston in the role of media pressure, pushing the main valve downward movement away from the main seat, the media flow valve while the c hole into the bottom of the diaphragm, when After the valve pressure exceeds the set pressure, adjust the compression spring pushing on the diaphragm shift, pay the valve moves in the closing direction of the medium flowing into the top of the piston is reduced, resulting in reduced pressure, then the main valve in on promoting the main valve spring force down, the gap with the main valve seat main valve decreases, medium flow is also decreased, so that the valve pressure will drop to a new equilibrium, whereas when the valve pressure is low When in the set pressure, the gap with the main valve seat main valve increases, the medium flow also increases, so that the valve will be increased pressure to reach a new equilibrium ..
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