Bokin Electro-Hydraulic Technology (Foshan) Co., Ltd. is one of the leading manufacturers and suppliers of 4WRLE Series Pilot‑Operated Directional Control Valves
Servo‑Grade Position Feedback | Integrated OBE | Optional IO‑Link | Full Size Range (NG10 – NG35) in China. If you're going to wholesale bulk durable 4WRLE Series Pilot‑Operated Directional Control Valves
Servo‑Grade Position Feedback | Integrated OBE | Optional IO‑Link | Full Size Range (NG10 – NG35) made in China, welcome to get pricelist from our factory. All customized products are with high quality and competitive price.
Key Specifications At a Glance
| Parameter | 4WRLE10 (NG10) | 4WRLE16 (NG16) | 4WRLE25 (NG25) | 4WRLE27 (NG27) | 4WRLE35 (NG35) |
|---|---|---|---|---|---|
| Nominal Size | NG10 (Component Series 4X) | NG16 (Component Series 4X) | NG25 (Component Series 4X) | NG27 (Component Series 4X) | NG35 (Component Series 4X) |
| Mounting Standard | ISO 4401‑05‑05‑0‑05 | ISO 4401‑07‑07‑0‑05 | ISO 4401‑08‑08‑0‑05 | ISO 4401‑08‑08‑0‑05 | ISO 4401‑10‑09‑0‑05 |
| Max Operating Pressure (A/B/P, external pilot) | 350 bar | 350 bar | 350 bar | 350 bar | 350 bar |
| Max Flow | 300 L/min | 800 L/min | 1250 L/min | 1850 L/min | 4700 L/min |
| Control Interfaces | ±10V (A1) / 4‑20mA (F1) / IO‑Link (L1) | ±10V (A1) / 4‑20mA (F1) / IO‑Link (L1) | ±10V (A1) / 4‑20mA (F1) / IO‑Link (L1) | ±10V (A1) / 4‑20mA (F1) / IO‑Link (L1) | ±10V (A1) / 4‑20mA (F1) / IO‑Link (L1) |
| Step Response Time (0–100%) | 25 ms | 37 ms | 36 ms | 36 ms | 55 ms |
| Hysteresis | ＜0.1% | ＜0.1% | ＜0.1% | ＜0.1% | ＜0.1% |
| Response Sensitivity | ＜0.05% | ＜0.05% | ＜0.05% | ＜0.05% | ＜0.05% |
| Pilot Oil Supply Modes | 4 modes (XY / PY / PT / XT) | 4 modes (XY / PY / PT / XT) | 4 modes (XY / PY / PT / XT) | 4 modes (XY / PY / PT / XT) | 4 modes (XY / PY / PT / XT) |
| Supply Voltage | 24 VDC (19 – 36 VDC) | 24 VDC (19 – 36 VDC) | 24 VDC (19 – 36 VDC) | 24 VDC (19 – 36 VDC) | 24 VDC (19 – 36 VDC) |
| Protection Class | IP65 | IP65 | IP65 | IP65 | IP65 |
| Weight | 9 kg | 12 kg | 19 kg | 21 kg | 80 kg |
| Optional Features | – | – | Damping plate | Damping plate, -967 membrane | Damping plate, -967 membrane |
| CE Compliance | MD 2006/42/EC, EN ISO 12100:2010 | MD 2006/42/EC, EN ISO 12100:2010 | MD 2006/42/EC, EN ISO 12100:2010 | MD 2006/42/EC, EN ISO 12100:2010 | MD 2006/42/EC, EN ISO 12100:2010 |
Available Configurations
Select the flow rating and spool type for your system:
|
Model Number |
Rated Flow |
Spool Type |
Quick Action |
| 4WRLE 10 Q3-100M-4X/MPT/24A1 |
100 L/min |
Q3 progressive (M characteristic) | |
| 4WRLE 16 Q3-250M-4X/MXY/24A1 | 250 L/min | Q3 progressive (M characteristic) | |
| 4WRLE 25 Q3-400M-4X/MXY/24A1 | 400 L/min | Q3 progressive (M characteristic) | |
| 4WRLE 27 Q3-600M-4X/MXY/24A1 | 600 L/min | Q3 progressive (M characteristic) |
Need a custom spool profile or special configuration? Send us your requirements → Get Custom Solution
Product Key Advantages
1. Servo‑Grade Ultra‑High Precision Control
Servo‑quality matched pilot spool & sleeve delivers ultra‑low hysteresis (＜0.1%) and high response sensitivity (＜0.05%). Integrated OBE closed‑loop position control ensures spool positioning independent of flow forces, with stable performance across temperature variations for precision‑critical applications.
2. Full Size Range for All Flow Demands
Covers 5 frame sizes from NG10 to NG35 with flow capacity from 300 L/min up to 4700 L/min, matching compact precision systems through to ultra‑large heavy‑duty industrial hydraulic circuits.
3. Standardized Interchangeable Design
All sizes follow ISO 4401 mounting standards with universal ±10V / 4‑20mA control interfaces. Fully interchangeable with equivalent Rexroth 4WRLE configurations for direct drop‑in installation, minimizing retrofit downtime.
4. Optional IO‑Link & Industrial Safety
Supports optional IO‑Link digital interface for remote parameter configuration, real‑time condition monitoring and safety shut‑off function up to PL d / Category 3 per EN 13849‑1. Fail‑safe pilot spool position and spring‑centered main valve ensure safe system reset upon power loss.
Compatibility Reference
|
Corresponding Rexroth Model |
BOKIN Equivalent Model |
Core Match Points |
| 4WRLE 10 Q3-100M-4X/MPT/24A1 | 4WRLE 10 Q3-100M-4X/MPT/24A1 | Same ISO 4401 mounting dimensions, electrical interfaces, servo‑grade performance, hydraulic characteristics |
| 4WRLE 16 Q3-250M-4X/MXY/24A1 | 4WRLE 16 Q3-250M-4X/MXY/24A1 | |
| 4WRLE 25 Q3-400M-4X/MXY/24A1 | 4WRLE 25 Q3-400M-4X/MXY/24A1 | |
| 4WRLE 27 Q3-600M-4X/MXY/24A1 | 4WRLE 27 Q3-600M-4X/MXY/24A1 | |
|
More models are available; please contact us for additional model options. |
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Note: For system configuration reference only. BOKIN is an independent brand. Please verify specifications before installation.
Typical Applications
- Precision hydraulic presses & forging equipment
- Automotive manufacturing & automated assembly lines
- Steel mill & metallurgical production systems
- Shipbuilding & marine hydraulic systems
- Offshore oil & gas equipment
- Power generation & industrial turbine hydraulics
- Mining & heavy construction machinery
Looking for standard pilot‑operated proportional valves?
Looking for cost‑effective general‑purpose valves?
Installation & Commissioning Guidelines
Installation Notes
- Thoroughly clean all oil ports and connecting surfaces before installation to prevent contaminants from entering the valve body.
- Confirm control signal type and power‑supply voltage match the valve nameplate specifications before wiring.
- Tighten mounting bolts evenly to the torque specified for each frame size to avoid valve‑body deformation and internal leakage.
- Ensure the tank line does not run empty. Install a preload valve (approx. 2 bar preload pressure) if required by installation conditions.
- Gradually ramp‑up system pressure during commissioning. Inspect for leakage and abnormal noise before full‑load operation.
Safety Precautions
- Retain manual hydraulic override for backup safety during system retrofits.
- Fit pressure‑relief valves in the hydraulic circuit for overpressure protection.
- Implement emergency‑stop logic to de‑energize the proportional valve under fault conditions.
- Ensure hoses and connections are rated for the system's maximum working pressure.
- Zero‑point adjustment shall only be performed by trained personnel.
FAQ
Q: What is the main difference between 4WRLE, 4WRKE and 4WRJE series?
A: 4WRLE features servo‑grade matched spool & sleeve for the highest precision (＜0.1% hysteresis) and supports optional IO‑Link. 4WRKE is a heavy‑duty 350 bar standard pilot‑operated valve. 4WRJE is a cost‑effective 250 bar general‑purpose valve. All three series share corresponding ISO 4401 mounting footprints.
Q: Which control interface should I choose, A1, F1 or L1?
A: Choose A1 (±10V) for high‑precision short‑wiring scenarios. Choose F1 (4‑20mA) for long‑distance transmission or sites with heavy electromagnetic interference. Choose L1 (IO‑Link) for Industry 4.0 integration, remote monitoring and safety shut‑off functionality.
Q: What pilot oil supply modes are available?
A: Four standard modes: external supply & return (XY), internal supply & external return (PY), internal supply & return (PT), external supply & internal return (XT). Select based on your system circuit design.
Q: Can 4WRLE valves directly replace Rexroth 4WRLE series?
A: Yes. All sizes follow ISO 4401 mounting standards with identical port geometry, electrical interfaces and servo‑grade hydraulic performance. They support drop‑in installation on compatible manifolds. Please send your full part number for final compatibility confirmation.
Ready to Get a Quote?
Send us your required model, quantity and application details, and our team will reply within 24 hours with a formal quotation.
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