Logic valves meet the flow control

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High-speed switching valve allows the maximum traffic because of their structural constraints, a smaller, but if used as a pilot jelpc  to control a logic poppet valve, there may be a larger flow propor tional control. Figure 3 for its hydraulic schematic diagram, when the PWM control to change the tone frequency of the high-speed switching valve, the poppet valve opening rate will be changed accordingly, therefore, flows from the P port of the T-port traffic will be essentially the high-speed switching valve tone proportional to the rate. Japan does not extend beyond the two companies have been stereotyped products, flow control up to 20 L / min. As needed, normally closed type shown in Figure 3 can also be designed as a normally open type. Switching pneumatic accessory  and logic valve poppet valve structure, the fluid cleanliness requirements low, the leak is relatively small, is the application of this valve on the rise in the operating agencies on some Japanese agricultural machinery, down, stop the action to electronic control and automation.