The type HD-4WRZE valves are pilot operated 4-way valves that are actuated via proportional solenoids, they control the direction and rate of flow. This proportional directional valve has a high cost performance. The factory is equipped with advanced production equipment from all over the world and has rigorous testing procedures to ensure the stable performance of each proportional valve.
| 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:
HD-4WRZE valves is used to control the direction and 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 4WRZE-7X
Pilot oil supply
Wāhitau
27, Yangsha Road, Huirong Taone, Qidong City, Jiangsu Province, Haina
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