Name: China 4WRJE27 A1 Pilot‑Operated Proportional Directional Valve ±10V Voltage Control | NG27 Size | Position Feedback OBE Manufacturers - Bokin
Brand: Bokin
SKU: 296407545

Bokin Electro-Hydraulic Technology (Foshan) Co., Ltd. is one of the leading manufacturers and suppliers of 4WRJE27 A1 Pilot‑Operated Proportional Directional Valve
±10V Voltage Control | NG27 Size | Position Feedback OBE in China. If you're going to wholesale bulk durable 4WRJE27 A1 Pilot‑Operated Proportional Directional Valve
±10V Voltage Control | NG27 Size | Position Feedback OBE 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	Value
Nominal Size	NG27 (Component Series 1X)
Mounting Standard	ISO 4401‑08‑08‑0‑05
Max Operating Pressure (A/B/P ports)	250 bar
Max Operating Pressure (T port, external pilot return)	250 bar
Max Flow	1000 L/min
Rated Flow (Δp = 5 bar per control edge)	500 L/min
Control Signal	A1 interface, ±10 VDC voltage input
Input Resistance	＞100 kΩ
Dynamic Response Time	＜60 ms
Hysteresis	≤ 1%
Response Sensitivity	≤ 0.5%
Pilot Oil Supply Modes	External pilot & external return (MXY) / internal pilot & external return (MPY) / internal pilot & internal return (MPT) / external pilot & internal return (MXT)
Supply Voltage	24 VDC (18 – 36 VDC range)
Protection Class	IP65 (correctly mounted connector)
Ambient Temperature	-20°C to +50°C
Weight	13.1 kg
CE Compliance	MD 2006/42/EC, EN ISO 12100:2010, EMC Directive 2014/30/EU

Available Configurations

Select the flow rating and spool type for your system:

Model Number	Rated Flow	Spool Type	Quick Action
4WRJE 27 E500L-1X/MXY/24A1	500 L/min	External pilot & external return (MXY)	Inquire Now
4WRJE 27 E500L-1X/MPY/24A1	500 L/min	Internal pilot supply (MPY)	Inquire Now
4WRJE 27 E500L-1X/MPT/24A1	500 L/min	Internal pilot & return (MPT)	Inquire Now
4WRJE 27 E500L-1X/MXT/24A1	500 L/min	External pilot & internal return (MXT)	Inquire Now

Need a custom spool profile or special configuration? Send us your requirements → Get Custom Solution

Product Key Advantages

1. Pilot‑Operated Stable Large‑Flow Control

Two‑stage pilot amplification with main‑stage electrical position feedback delivers precise flow regulation independent of flow‑force disturbances. Hysteresis ≤1% and response sensitivity ≤0.5% ensure consistent closed‑loop performance for large‑flow industrial hydraulic systems.

2. Hassle‑Free Direct Interchangeability

Manufactured strictly to ISO 4401‑08‑08‑0‑05 NG27 mounting dimensions (Ø32 mm ports), with identical port layout and ±10V A1 electrical pin‑out matching Rexroth 4WRJE27 A1. Direct drop‑in installation without manifold re‑machining or rewiring, minimizing retrofit downtime.

3. Robust Industrial‑Grade Durability

13.1 kg heavy‑duty construction with IP65 ingress protection withstands vibration, noise and harsh industrial environments. Wide fluid temperature tolerance and multiple pilot oil supply modes adapt to diverse circuit designs and heavy‑duty operating scenarios.

4. Safety‑Enhanced Low‑Maintenance Design

Spring‑centered main spool automatically returns to neutral position upon de‑energization for safe system reset. Integrated OBE includes undervoltage detection and short‑circuit protection. LED status display enables quick fault diagnosis, and detachable mating connectors simplify on‑site maintenance.

Compatibility Reference

Corresponding Rexroth Model	BOKIN Equivalent Model	Core Match Points
4WRJE 27 E500L-1X/MXY/24A1	4WRJE 27 E500L-1X/MXY/24A1	Same ISO 4401 NG27 mounting, ±10V A1 interface, position feedback, hydraulic performance
4WRJE 27 E500L-1X/MPY/24A1	4WRJE 27 E500L-1X/MPY/24A1
4WRJE 27 E500L-1X/MPT/24A1	4WRJE 27 E500L-1X/MPT/24A1
4WRJE 27 E500L-1X/MXT/24A1	4WRJE 27 E500L-1X/MXT/24A1
More models are available; please contact us for additional model options.

Note: For system configuration reference only. BOKIN is an independent brand. Please verify specifications before installation.

Typical Applications

Heavy hydraulic presses & large forming equipment
Large injection molding machine hydraulic circuits
Industrial hydraulic power units
Heavy material handling machinery
Large‑scale industrial automated production lines

Looking for higher‑pressure heavy‑duty valves?

View 4WRKE Series →

Installation & Commissioning Guidelines

Installation Notes

Thoroughly clean all oil ports and connecting surfaces before installation to prevent contaminants from entering the valve body.
Confirm the control signal type (±10V voltage) and power‑supply voltage match the valve nameplate specifications before wiring.
Tighten 6 mounting bolts evenly to the recommended torque (100 Nm ±20% for M12 screws) to avoid valve‑body deformation and internal leakage, complying with ISO 4401‑08‑08‑0‑05 NG27 mounting specifications.
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 switching to 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 hydraulic 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 flow difference between 4WRJE27 A1 and 4WRJE25 A1?

A: 4WRJE27 A1 (NG27) supports up to 1000 L/min max flow for large‑flow hydraulic systems; 4WRJE25 A1 (NG25) supports up to 870 L/min max flow for medium‑heavy equipment. Both share pilot‑operated position‑feedback architecture.

Q: What pilot oil supply modes are available for 4WRJE27?

A: Four standard modes: external pilot & external return (MXY), internal pilot & external return (MPY), internal pilot & internal return (MPT), external pilot & internal return (MXT). Select based on your system circuit design.

Q: Can this valve directly replace Rexroth 4WRJE27 series?

A: Yes. It follows the same ISO 4401 NG27 mounting standard, identical port geometry, ±10V A1 electrical interface and hydraulic performance. It supports drop‑in installation on compatible manifolds. Please send your full part number for final compatibility confirmation.

Q: What about warranty and lead‑time?

A: All standard valves carry a 12‑month quality warranty from delivery date plus lifelong technical consultation. Standard 4WRJE27 A1 configurations ship within 2‑4 weeks after order confirmation.