Valves of type 4WRKE are 2-stage proportional directional valves. They control the flow direction and size. The main stage is position-controlled so that the control spool position is independent from flow forces also in the case of bigger flows. After the introduction of technology and independent research and development, Huade brand proportional valve products have stable performance and high quality.
| Hydraulic | |||||
| Size | 10 | 16 | 25 | 32 | |
| Operating pressure | Pilot control valve (MPa) Pilot oil supply | 2.5~31.5 | |||
| Main valve, ports P, A, B (MPa) | 31.5 | 35 | 35 | 35 | |
| Return pressure (MPa) | Pilot oil drain, external | 31.5 | 25 | 25 | 25 |
| Pilot oil drain, internal | ＜1 | ||||
| Port Y | ＜1 | ||||
| Nominal flow q ± 10 % at △p = 1MP (L/min) | 25 50 90 | 125 180 | 220 350 | 400 600 | |
| Flow of main valve (max. permissible)(L/min) | 170 | 460 | 870 | 1600 | |
| Pilot oil flow at port X or Y with a step form of input signal from 0 to 100 % (L/min) | 4.1 | 8.5 | 11.7 | 13.0 | |
| Hysteresis (%) | ≤1 | ||||
| Response sensitivity (%) | ≤0.5 | ||||
| Filtering precision (μm) | ≤20 | ||||
| Pressure fluid | Mineral oil Phosphate ester | ||||
| Medium viscosity (mm2/s) | 20~380 | ||||
| Pressure fluid temperature range(℃) | -20~70 | ||||
| Weight (Kg) | 8.7 | 11.2 | 16.8 | 31.5 | |
| Electrical data | |
| Valve protection to DIN 40 050 | IP65 |
| Voltage type | DC |
| Signal type | Analogue |
| Power, max (W) | 72 (average = 24 W) |
| Electrical connection | With component plug to E DIN 43 563-AM6 |
| Plug-in connector to E DIN 43 563-BF6-3 | |
| Control electronics | Integrated into the valve |
Features:
▶Pilot operated 2-stage proportional directional valve with electrical position feedback of the main control spool and integrated electronics (OBE) ;
▶Control of flow direction and size of a flow
▶Operation by means of proportional solenoids
▶Subplate mounting: Porting pattern according to IS0 4401
▶Spring-centered main control spool
▶Electrical position feedback
▶Pilot control valve: Single-stage proportional directional valve
▶Main stage with position control
Application:
Proportional directional valve 4WRKE-3X is used to control the direction and flow.
The valves mainly consist of the pilot control valve (1), the housing (8), the main control spool (7), the covers (5 and 6), the centering spring (4), the inductive position transducer (9) and the pressure reducing valve (3). If there is no input signal, the main control spool (7) will be kept in the central position by the centering spring (4). Both the change of position of the main control spool (7) and the change of the command value at the junction summing of the amplifier create a differential voltage. During the comparison of command and actual value a possible control deviation is determined via the electronics and the proportional solenoid of the pilot control valve (1) is supplied with current. The current induces a force in the solenoid which operates the control spool via a plunger in a row. The flow which has been released via the control cross sections causes an adjustment of the main control spool.The main control spool (7) with the core of the inductive potual value corresponds to the command value. In a controlled state the main control spool (7) is balanced and kept in this position transducer (9) attached to it is displaced until the control position. The control spool stroke and the control opening change proportionally to the command value. The control electronics are integrated in the valve. By adjusting valve and electronics, the deviation in series production of the devices is kept low. The tank lines must not be allowed to run empty; a preload valve is to be installed in the case of a corresponding installation condition (counterbalance pressure approx. 0.2 MPa)。
Symbol of Proportional Directional Valve 4WRKE-3X
Package of Proportional Directional Valve 4WRKE-3X
Address
No. 27, Yangsha Road, Huilong Town, Qidong City, Jiangsu Province, China
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