China Hydraulic Proportional Valve Manufacturers - Customized Hydraulic Proportional Valve

Full-Range Solutions for Industrial Hydraulic Control

BOKIN offers a comprehensive range of independently developed direct-operated and pilot-operated hydraulic proportional valves for precise flow, pressure and directional control in industrial systems. All series follow uniform ISO 4401 mounting standards and match the dimensional, interface and hydraulic performance specifications of equivalent Rexroth configurations, supporting straightforward drop-in installation for compatible systems.

With local manufacturing in China for stable supply and short lead times, we deliver reliable precision, fast dynamic response and long-term stable performance for equipment manufacturers, system integrators and maintenance partners worldwide.

Core Specifications：

Flow Range: 7–4,700 L/min
Max. Working Pressure: Up to 350 bar
Control Options: ±10 V / 4–20 mA / Selected Digital Interfaces
Mounting: ISO 4401
Warranty: 12 Months Global Warranty

Find My Valve Series

4WREE Series

Direct-Operated Proportional Directional Valves

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4WRPEH Series

High-Response Proportional Directional Valves

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4WRKE Series

Pilot-Operated Proportional Directional Valves

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4WRJE Series

Proportional Directional Valves with Position Feedback

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4WRLE Series

Pilot-Operated Proportional Directional Valves

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4WRAE Series

Direct-Operated Proportional Directional Valves

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4WRZE Series

Pilot-Operated Proportional Directional Valves

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4WRZ Series

Pilot-Operated Proportional Directional Valves

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4WRTE Series

High-Performance Proportional Directional Valves

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Explore All Valve Models

4WRKE10 A1 Pilot‑Operated Proportional Directional Valve ...
BOKIN 4WRKE10 A1 is a pilot‑operated two‑stage proportional directional valve with electrical position feedback and integrated on‑board electronics (OBE). The main‑stage position control ensures

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4WREE6 A1 Proportional Directional Valve
±10V Voltage...
BOKIN 4WREE6 A1 is a compact direct-operated proportional directional valve with electrical position feedback and ±10V voltage control. Designed for high-precision small-to-medium flow hydraulic

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4WRPEH6 A1 High-Speed Proportional Directional Valve
...
BOKIN 4WRPEH6 A1 is a direct-acting high-speed proportional directional valve with electrical position feedback and ±10V voltage control. Designed for high-frequency, micro-precision hydraulic

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4WRJE10 A1 Pilot‑Operated Proportional Directional Valve ...
BOKIN 4WRJE10 A1 is a pilot‑operated two‑stage proportional directional valve with electrical position feedback and integrated on‑board electronics (OBE). Main‑stage position control ensures spool

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4WRLE10 A1 Pilot‑Operated Directional Control Valve
±...
BOKIN 4WRLE10 A1 is a pilot‑operated two‑stage directional control valve with electrical position feedback and integrated on‑board electronics (OBE). Equipped with servo‑quality pilot spool & sleeve

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4WRAE6 A1 Direct‑Operated Proportional Directional Valve ...
BOKIN 4WRAE6 A1 is a direct‑operated 4/3‑way proportional directional valve with integrated on‑board electronics (OBE). Spring‑centered control spool with proportional solenoid actuation delivers

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4WRZE10 A1 Pilot‑Operated Proportional Directional Valve ...
BOKIN 4WRZE10 A1 is a pilot‑operated 4/3‑way proportional directional valve with integrated on‑board electronics (OBE). Spring‑centered control spool with proportional solenoid actuation delivers

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4WRZ10 Pilot‑Operated Proportional Directional Valve
...
BOKIN 4WRZ10 is a pilot‑operated 4/3‑way proportional directional valve with external control electronics configuration. Spring‑centered control spool with proportional solenoid actuation delivers

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4WRPE10 A1 Proportional Directional Valve
±10V Voltag...
BOKIN 4WRPE10 A1 is a direct-operated proportional directional valve with electrical position feedback and integrated on-board electronics (OBE). No pilot oil supply is required, delivering

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4WRPE10 F1 Proportional Directional Valve
4-20mA Curr...
BOKIN 4WRPE10 F1 is a direct-operated proportional directional valve with integrated OBE and 4-20mA current loop control. Featuring built-in cable break monitoring and strong electromagnetic

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4WRTE10 A1 Pilot‑Operated Directional Control Valve
±...
BOKIN 4WRTE10 A1 is a pilot‑operated 4/3‑way directional control valve with electrical position feedback and integrated on‑board electronics (OBE). Dual inductive position transducers (pilot + main

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4WREE6 F1 Proportional Directional Valve
4-20mA Curre...
BOKIN 4WREE6 F1 is a direct-operated proportional directional valve with integrated OBE and 4-20mA current loop control. Featuring built-in cable break monitoring and strong electromagnetic

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Hydraulic Proportional Valve Solutions

BOKIN delivers a full portfolio of direct-operated and pilot-operated hydraulic proportional valves built to uniform ISO 4401 standards, with Rexroth-compatible configurations for seamless system integration and retrofit. All units undergo 100% pre-shipment inspection with CE certification; OEM custom solutions and professional model recommendation services are available on request.

Need Help Identifying the Right Proportional Valve?

Not sure which proportional valve series or model fits your application? Contact our technical team for assistance with model selection, specifications and compatibility requirements.

Our Proportional Valve Series

Select the series that matches your flow, precision and application requirements to view full specifications and models.

Series	Core Positioning	Key Specifications	Typical Applications	Quick Action
4WRA / 4WRAE	Direct-operated, basic economical type	NG6 / NG10 Max 42 / 75 L/min 315 bar With/without integrated OBE Open-loop control	General hydraulic power units Simple control systems Light-duty industrial equipment	4WRA(E).PDF
4WREE	Direct-operated, high-precision with electrical position feedback	NG6 / NG10 Max 80 / 180L/min 350 bar Integrated OBE Closed-loop position control Hysteresis ≤ 0.1%	Precision injection molding control Machine tool feed systems Medium-precision motion control Small hydraulic test rigs	4WREE.PDF
4WRPE	Direct-operated high-performance, closed-loop position control	NG10 only Max 80L/min 350 bar Integrated OBE Electrical position feedback High dynamic response	High-precision machine tool hydraulics Injection molding clamping control Metal forming equipment Medium-dynamic motion systems	4WRPE.PDF
4WRPEH	Direct-operated high-response, servo-grade precision	NG6 / NG10 Up to 1000 L/min 350 bar Hysteresis < 0.1% Optional IO-Link interface	High-speed production equipment High-dynamic control scenarios Ultra-precision motion systems	4WRPEH.PDF
4WRZ / 4WRZE	Pilot-operated, standard medium-flow type	NG10 – NG32 Up to 1600 L/min 350 bar With/without integrated OBE	Medium to large hydraulic systems General industrial machinery Metal forming equipment	4WRZ(E).PDF
4WRTE	Pilot-operated high-dynamic, high-performance	NG10 – NG35 Up to 1000 L/min 350 bar Main stage position feedback	High-cycle production lines High-demand hydraulic systems Advanced machine tools	4WRTE.PDF
4WRKE	Pilot-operated heavy-duty, large-flow type	NG10 – NG35 Up to 4700 L/min 350 bar Main stage position control	Die casting machines Large hydraulic presses Metallurgical equipment	4WRKE.PDF
4WRLE	Pilot-operated linear feedback, intelligent type	NG10 – NG35 Up to 1500 L/min 350 bar LVDT feedback, IO-Link optional PL d safety level	Smart manufacturing lines Industry 4.0 systems High-precision test rigs	4WRLE.PDF
4WRJE	Pilot-operated energy-saving, low power consumption	NG10 – NG27 Optimized efficiency 250 bar Stable long-run performance	Energy-saving hydraulic systems Continuous-operation stations Green manufacturing equipment	4WRJE.PDF

Not sure which series fits your system? Send us your working pressure, flow rate and application details, and our hydraulic engineers will recommend the optimal solution within 24 hours.

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Engineered for Reliable Industrial Performance

1.Precision Manufacturing

BOKIN proportional valves are manufactured using precision machining and controlled assembly processes to maintain consistent spool performance, dimensional accuracy and hydraulic characteristics.

2.Dimensional Compatibility

Selected series are manufactured according to established mounting and interface standards, including ISO 4401 configurations, to support compatibility with corresponding hydraulic system components.

3.Performance Inspection

Manufacturing quality is supported by inspection procedures covering machining, assembly, pressure performance and hydraulic characteristics before shipment.

4.OEM & Custom Configuration

We support custom spool characteristics, control interfaces, nameplates, packaging and other configuration requirements for distributors, OEMs and hydraulic system integrators.

Typical Industrial Applications

Our proportional valve solutions deliver precise control for all types of heavy-duty and precision manufacturing equipment. Click to view recommended series for your industry.

01/

Plastic & Rubber Machinery – injection molding machines, blow molding machines, extruders (Recommended series: 4WREE, 4WRLE, 4WRKE)

02/

Metal Forming – press brakes, stamping presses, forging equipment, rolling mills（Recommended series: 4WRKE, 4WRTE, 4WREE）

03/

Die Casting Industry – cold chamber & hot chamber die casting machines (Recommended series: 4WRTE, 4WRKE)

04/

New Energy Manufacturing – lithium battery roller presses, electrode production lines (Recommended series: 4WRPEH, 4WREE)

05/

Hydraulic Test Equipment – hydraulic test rigs, laboratory testing systems (Recommended series: 4WRPEH, 4WREE, 4WRLE)

06/

Metallurgy & Steel – steel mill equipment, continuous casting production lines (Recommended series: 4WRKE, 4WRZE)

07/

Construction Machinery – heavy-duty hydraulic systems & mobile equipment

08/

General Industry – standard hydraulic power units, automated production lines

Why Choose BOKIN Proportional Valves

Core Advantages of BOKIN Solutions

Rexroth-Compatible Design

Selected BOKIN proportional valve series are engineered to match corresponding Rexroth mounting dimensions, interfaces and key hydraulic performance requirements, supporting straightforward system integration and retrofit applications.

Wide Flow & Pressure Range

From compact precision-control valves to high-flow pilot-operated solutions, BOKIN provides configurations covering approximately 7 to 4,700 L/min and up to 350 bar, depending on series and model.

Precision Hydraulic Control

Electrical position feedback, integrated electronics and optimized spool designs provide precise flow and directional control for demanding industrial hydraulic applications.

Factory Quality & Flexible Supply

Each valve undergoes defined manufacturing and performance inspection procedures before shipment. Standard configurations support efficient delivery, while custom specifications are available for OEMs, distributors and system integrators.

Control Technology Comparison

Proportional Valve vs Servo Valve vs On/Off Valve

Choose the control technology that best matches your precision, response, contamination tolerance and cost requirements.

Feature	On/Off Valve	Proportional Valve	Servo Valve
Control Type	Binary (Open / Closed)	Stepless proportional positioning	Ultra-precise positioning
Response Time	10 – 100 ms	5 – 50 ms	1 – 10 ms
Control Accuracy	±5 – 10%	±0.1 – 3%	±0.01 – 0.5%
Contamination Resistance	Excellent	Good to Moderate	Moderate
Best For	Simple on-off control	Most industrial precision control	Ultra-high dynamic precision systems

For most industrial hydraulic applications, proportional valves provide an effective balance between precision, response, reliability and system cost.

Custom & OEM Services for Global Partners

BOKIN supports flexible customization for distributors, OEM manufacturers and hydraulic system integrators to match your unique project requirements.

Available options include:

Custom spool characteristics
Special control interfaces
Voltage and current input configurations
Custom nameplates and branding
Customized packaging
Application-specific valve configurations

Customizable Options

Parameter	Available Configurations
Rated Pressure	up to 315 / 350 bar
Flow Capacity	7 L/min to 4700 L/min
Control Interface	±10 V voltage, 4…20 mA current, IO-Link
Seal Material	NBR, FKM (for mineral oil, biodegradable fluids)
Port Size	NG6 to NG35, ISO 4401 standard mounting
Mounting Style	Subplate mounting, manifold mounting

MOQ for custom branding is flexible. Contact our sales team for detailed OEM cooperation policies and solutions.

Request OEM Solution

Manufacturing Strength & Certifications

All BOKIN proportional valves are manufactured under strict process control and fully tested before shipment. Our production facility supports stable monthly output of over 10,000 units to meet bulk order demands.

Certifications & Standards

CE certified per MD 2006/42/EC, EN ISO 12100:2010

All series comply with ISO 4401 mounting standards

100% pre-shipment performance inspection

12-month global quality warranty for all standard models

Core Strengths

Precision CNC machining with micron-level spool matching

Full-process quality control from raw materials to final testing

In-house hydraulic engineering team for professional technical support

Global distributor and OEM partner support system

Hydraulic proportional valve CE certification certificate

Simple & Transparent Ordering Process

Send Your Requirements

Send us your model, quantity and application details

Technical Confirmation

Our engineers verify specifications and configuration.

Quotation

Receive a detailed quotation with specifications and delivery information.

Production & Inspection

Manufacturing & 100% performance testing

Delivery

Shipment after balance payment, with tracking provided

Technical Support

12-month warranty + 24/7 technical support

FAQ

Q: Are all BOKIN proportional valves compatible with Rexroth series valves?

A: Yes. All BOKIN proportional valve series follow consistent dimensional and hydraulic specifications with Rexroth equivalents, with the same ISO 4401 mounting pattern and electrical interfaces, enabling direct drop-in installation.

Q: What is the minimum order quantity for proportional valves?

A: MOQ is 1 piece for all standard models. Quality testing and maintenance spare parts are fully supported.

Q: How long is the standard delivery time?

A: Standard stock models are delivered within 2–4 weeks after order confirmation. Custom configured models take 4–6 weeks.

Q: What control interfaces are available?

A: Most series are available with ±10 V voltage input (A1 version) and 4…20 mA current input (F1 version). Selected series (4WRPEH, 4WRLE) also support IO-Link digital interface for Industry 4.0 integration.

Q: Do you provide technical support for model selection?

A: Yes. Our hydraulic engineering team can provide model recommendation and system matching solutions based on your working pressure, flow rate and application scenarios.

Q: What warranty do you offer?

A: All proportional valves come with a 12-month quality warranty from the date of delivery. We provide free replacement parts and 24/7 technical support for non-artificial quality issues.

Q: Can we cooperate as an agent or exclusive distributor?

A: Agent and exclusive distributor cooperation is welcome worldwide. Favorable policies include competitive pricing, marketing support, technical training and regional protection.

Q: Are BOKIN proportional valves compatible with Rexroth systems?

A: Selected BOKIN proportional valve series are engineered for compatibility with corresponding Rexroth configurations, including relevant mounting dimensions, interfaces and key hydraulic performance requirements. Compatibility should be confirmed according to the exact model and configuration.

Packaging & Shipping

Item	Details
Packaging	Standard export cases or customized packaging
Shipping Methods	Sea freight, air freight and express delivery (DHL, FedEx, UPS) are all available. We will recommend the most suitable option based on your order volume and urgency.

Installation Reference

For standard installation guidance, please refer to the product datasheet or contact our technical team. We also provide on-site commissioning support for bulk orders.