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  • Explosion-Proof Electro-Hydraulic Proportional Directional Control Valve
  • Explosion-Proof Electro-Hydraulic Proportional Directional Control Valve
  • PRODUCT DETAILS
  • FAQ
Specific Applications

·Steel and metallurgical hydraulic systems
·Offshore drilling platforms and marine equipment
·Petrochemical process equipment
·Large hydraulic presses
·Mining and heavy-duty machinery
·Explosion-proof automated production lines

Core Functions

Pilot-Operated Proportional Control
The electro-hydraulic pilot design converts proportional electrical signals into smooth spool movement, allowing accurate directional control for hydraulic actuators.

Stable Performance for High-Flow Systems
Compared with direct-operated proportional valves, the pilot-operated structure is better suited for hydraulic systems with higher flow demand and continuous-duty operation.

Smooth Speed and Position Control
By continuously adjusting spool position, the valve helps reduce pressure fluctuations and hydraulic shock, improving the stability of cylinders and hydraulic motors.

Explosion-Proof Electrical Design
The valve operates with a DC 24 V power supply, a rated current of 800 mA, and an IP55 protection rating, making it suitable for electrically controlled hydraulic systems installed in hazardous industrial environments.

Wide Hydraulic Fluid Compatibility
Designed for use with mineral hydraulic oil and phosphate ester hydraulic fluid, the valve can be integrated into a wide variety of industrial hydraulic circuits.

Technical Specifications
Specifications 03  04  06 
Maximum Operating Pressure(MPa) Oilports P, A, B 31.5 
Oilports T Y External Return 15 
Y Internal Return
Oilports Y Y External Return
Working Fluid
Mineral oil phosphate-ester
Fluid temp. (℃) -20~70
Viscosity(mm²/s) 2.8~380
Pilot Control Pressure(MPa) External Pilot Oil Supply 3~10
Internal Pilot Oil Supply ≤10*
Hysteresis (%) <6
Repeatability (%) <3
Operating Voltage (M) DC24
Rated Current (mA) 800 
Coil Resistance (Ω) 19.5 
Protection Rating IP55

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OEM / ODM Customization

We provide OEM and ODM services to meet different hydraulic control requirements, including:

·Pilot stage and proportional control configuration
·Coil voltage and electrical connector options
·Spool function and switching characteristics
·Customized product marking and packaging
·Technical support based on hydraulic system design

Purchasing Information

Item

Details

MOQ

Standard cartridge valves: 100 pcs/model; Custom manifold blocks: 30 pcs minimum. Small trial orders are accepted.

Lead Time

Stock valves: 2 weeks; Regular orders: 6–8 weeks; Custom products: about 8 weeks after drawing approval and deposit.

Payment Terms

30% T/T deposit, 70% balance before shipment. Sample orders require full payment. L/C is negotiable for long-term customers.

Trade Terms

FOB Ningbo by default. CIF quotations are available upon request.

Sample Policy

Stock samples are available. OEM/ODM samples can be produced based on drawings or samples.

OEM / ODM

Logo engraving, customized packaging, and product customization are supported.

Quality Assurance

Every valve is pressure-tested before shipment and covered by a 12-month warranty.

FAQ

1. What is an Explosion-Proof Electro-Hydraulic Proportional Directional Control Valve used for?
An Explosion-Proof Electro-Hydraulic Proportional Directional Control Valve is used to achieve precise directional and motion control in hydraulic systems operating in hazardous environments, especially where high-flow performance and proportional control are required.

2. Why choose a pilot-operated proportional valve instead of a direct-operated valve?
Pilot-operated proportional valves are generally better suited for larger hydraulic systems because they provide more stable spool movement and can handle higher flow requirements.

3. What electrical specifications does this valve support?
The standard specification is DC 24 V with a rated current of 800 mA. Other electrical requirements can be evaluated for OEM projects.

4. Which hydraulic fluids are compatible with this valve?
The valve is designed for mineral hydraulic oil and phosphate ester hydraulic fluid used in industrial hydraulic systems.

5. What information is needed to select the right Explosion-Proof Electro-Hydraulic Proportional Directional Control Valve?
Please provide the application, hydraulic circuit design, required control accuracy, flow demand, operating voltage, and hazardous area classification. Our engineers will recommend the appropriate Explosion-Proof Electro-Hydraulic Proportional Directional Control Valve model and configuration.

Ningbo Stars Hydraulic Co., Ltd.

Founded in 2001, Ningbo Stars Hydraulic Co., Ltd. is a hydraulic valve manufacturer that upholds integrity and wins market recognition through superior quality and pragmatic craftsmanship. We introduced hydraulic valve technologies from Germany’s Rexroth and Japan’s Yuken series, and through years of dedicated research, digestion, absorption, modification and optimization, our products stand out in the market. Our valves sell well nationwide and are exported to overseas markets, earning praise and trust from numerous customers at home and abroad. Though compact in size, hydraulic valves deliver critical functions as indispensable core components enabling multi-functional and automatic operation of mechanical equipment. The quality of a hydraulic valve largely determines the overall operating performance of the entire machinery. Supported by national industrial policies, China’s machinery industry is striving to catch up with European and American counterparts to meet booming demands from agriculture, industry, construction, transportation, and land, sea and air defense sectors—this momentum has greatly boosted the domestic hydraulic industry. To embrace the new wave of machinery upgrading, our company has launched a new round of optimization and improvement for our valve products. Building on our existing valve manufacturing technologies and processes, and under the guidance of domestic and international industry experts as well as Taiwanese technical engineers, we have comprehensively upgraded product structures, internal workshop purification and precision of core components. We have implemented effective control over internal stress, thermal deformation, leakage and noise of valves. Every batch of raw materials, auxiliary parts, semi-finished and finished products undergoes rigorous item-by-item inspection. We have also strengthened full-process quality supervision, with zero tolerance for defective products leaving the factory, guaranteeing reliable and long-lasting product performance. Our after-sales service includes timely technical guidance and warranty support, plus follow-up tracking of product operating conditions throughout their service life. Product competition is essentially a contest of technology, workforce dedication, team competence and corporate management. More importantly, it hinges on the founder’s philosophy, integrity and service mindset. There is no end to pursuing premium quality. Committed to specialization, refinement, quality excellence and technological innovation, our company adheres to the manufacturing principle of “Better fewer than shoddy goods” and the service tenet of “Put ourselves in customers’ shoes”. Standing at a new developmental milestone, all staff at Stars sincerely seek cooperation with clients worldwide. We aim to build mutual trust and shared prosperity, and jointly create a brighter future for the hydraulic industry.

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