Normally, the working disc is configured in groups, and the inlet valve block has a built-in three-way pressure compensation bypass relief valve. Logic component. When the multi-way valve directional valve stops operation and each valve is in the middle position, the valve will bypass the main oil flow with compensation pressure (6-·12BAR). When a valve is working, the valve bypass port is reduced under the action of load pressure, according to the load pressure to provide the required flow.
The load sensing shuttle valve transmits the load pressure of each working valve plate to the pressure compensation bypass relief valve of the inlet valve block. Two-way pressure compensation constant difference pressure reducing valve: when multiple working plate valves work at the same time, the load pressure is transmitted to the spring side of the valve. At this point, through the negative feedback of the valve core, to automatically adjust the pressure difference at both ends of the throttle valve port, so that it basically remains unchanged. Under its action, the flow of each valve is kept constant, and is not affected by load changes. Mechanical Design, Machining, Design Software, Mechanical Engineer, Equipment management, Welding, hydraulics, casting, sealing, Measurement, Engineering Machinery, POWDER metallurgy, bearings, gears, pumps and valves, Industrial automation.
Safety relief valve: usually used for extreme protection of working mechanism, such as variable amplitude cylinder.
Electromagnetic relief valve: used for overload protection of working mechanism, such as crane torque limit, three circle protection, etc.
Proportional pressure reducing valve: the relative side of the valve hand lever is located in the work, for the straight acting proportional pressure reducing valve, the valve to realize proportional reversing, note: straight lift the proportion of the proportional pressure reducing valve reversing proportion compared with the manual directional, micro performance is bad, if used in the application of high flow control accuracy, should adopt proportional servo valve configuration work. REXROTH, BUCHER, DELTAPOWER all have servo-driven proportional multiway valve directional valve.
According to the use place, purpose, multiple directional control valves and understand the relevant laws and regulations, specifications, standards, guidelines and allowable recognition can choose suitable for various requirements of the valve, after confirmation of the valve working conditions, suitable medium, pressure, medium temperature, determine the match the pipe nominal diameter multiple directional control valves, DN (mm), connected with pipeline is determined way: Flange type, inside (outside) thread type, welding type, clamp type, clamp sleeve type, etc., determine the sealing performance requirements of the valve, multi-way valve sealing grade or sealing leakage, determine the protective coating requirements, packaging requirements, transportation requirements of the valve.
Special needs multiple directional control valves should also be sure: length, height of the valve structure, appearance size, flow resistance, discharge capacity, flow characteristic, protection grade, explosion-proof performance parameters, and determine the installation position of the valve position, determine the operating mode of the valve, worm gear dynamic multiple directional control valve, pneumatic, electric, hydraulic, electromagnetic actuator, electric hydraulic, etc. Confirm the types of valves: gate valve, globe valve, throttle valve, plunger valve, ball valve, butterfly valve, diaphragm valve, plug valve, check valve, safety valve, trap and other special valves; Determine the use of valve form: switch type, regulator type, safety type, etc. Determine the material of valve shell and inner parts: multi-way reversing valve gray iron, ductile iron, carbon steel, alloy steel, stainless steel, copper alloy, aluminum alloy, plastic, etc.
Post time: Dec-21-2021