The type HD-4WRZ valves are 4-way valves which are actuated via proportional solenoids. They are used to control the direction and rate of flow. Huade Hydraulic has introduced high technology from Rexroth. After years of independent research and development, the proportional valves produced by Huade has excellent performance, which can be comparable to those of top-tier brands.
| Hydraulic | |||||
| Nominal size | 10 | 16 | 25 | 32 | |
| Operating pressure | pilot oil supply external | 3~10 | |||
| -Pilot valve (MPa) | pilot oil supply internal | 10~31.5 | 10~35 | ||
| -Main valve (MPa) | 31.5 | 35 | |||
| Return line pressure (MPa) | Port T (pilot oil drain extermal) | 31.5 | 25 | 25 | 15 |
| Port T (pilot oil drain intermal) | 3 | ||||
| Port Y | 3 | ||||
| Pilot oil volume (cm3) for spool movement 0~100% | 1.7 | 4.6 | 10 | 26.5 | |
| Pilot oil flow at port X and Y (L/min) for stepped form of input signal 0~100% | 3.5 | 5.5 | 7 | 15.9 | |
| Flow through main valve (L/min) | 170 | 460 | 870 | 1600 | |
| Hysteresis % | ≤6 | ||||
| Pressure fluid | Mineral oi1 to DIN 51 524 | ||||
| Pressure fluid temperature range (℃) | -20~80 | ||||
| Viscosity range (mm2/s) | 20~380 | ||||
| Installation | optional, preferably horizontal | ||||
| Weight for version WRZ... (for WRZE"additionally 0.2kg) | 7.8 | 13.4 | 18.2 | 42.2 | |
| Electrical | |||
| Valve type | WRZ | WRZE | |
| Voltage type | DC | ||
| Max.current (A) | 1.5 | 2.5 | |
| Solenoid coil resistance (Ω) | Cold value at 20℃ | 4.8 | 2 |
| Max.warm value | 7.2 | 3 | |
| Protection | IP65 | ||
| Coil temperature (℃) | up to 150 | ||
| Duty % | 100 | ||
| Control electronics | HD-VT-VSPA2-50-1X/. | integrated control electronics | |
Features:
▶Pilot operated proportional directional valve
▶For subplate mounting
▶The control of direction and rate of flow
▶Spring centered control spool
▶Valve and proportional control electronics from a single source
Application:
The function of HD-4WRZ valves is to control the direction and rate of flow.
The valve basically comprises of: pilot valve ①, main spool ④, main valve ⑥, and centering spring ③. With the solenoid B in the de-enegised condition the control spool ② move to the right.The pilot oil supply to the pilot valve is internal via port P or external via port X. Pilot oil flows via the pilot valve ① into the pressure chamber and moves the main spool ④ in proportion to the electrical input signal.The connection from P to A and from B to T is via orifice type cross-sections with progressive flow characteristics.
With the solenoid A in the de-enegised condition the main spool move to the left.The connection from P to B and from A to T. De-energisation of the solenoid, the control spool and pilot spool ④ are moved back into their centre positions.
Symbol of Proportional Directional Valve 4WRZ-7X
Pilot oil supply
Address
No. 27, Yangsha Road, Huilong Town, Qidong City, Jiangsu Province, China
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