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  • Explosion-Proof Proportional Pilot Operated Relief Valve
  • Explosion-Proof Proportional Pilot Operated Relief Valve
  • PRODUCT DETAILS
  • FAQ
Specific Applications

·Hydraulic power units in petrochemical facilities
·Offshore and marine hydraulic equipment
·Mining machinery in hazardous areas
·Heavy-duty industrial hydraulic systems
·Explosion-proof automation equipment
·Hydraulic testing systems requiring variable pressure control

Core Functions

Stable Pressure Regulation
The pilot-operated design improves pressure control stability, making the valve suitable for hydraulic systems that require continuous operation and consistent pressure performance.

Proportional Pressure Adjustment
The valve changes the relief pressure according to the electrical input signal, allowing continuous adjustment instead of manual fixed pressure settings.

Suitable for High-Performance Hydraulic Circuits
Compared with direct-operated pressure valves, the pilot-operated structure is more suitable for systems requiring higher flow capacity and stable pressure control.

Explosion-Proof Electrical Configuration
The valve uses a DC 24 V power supply with a rated current of 750 mA and an IP55 protection rating, providing reliable electrical protection for industrial environments.

Hydraulic Fluid Compatibility
The valve is designed for use with mineral hydraulic oil and phosphate ester hydraulic fluid, supporting different industrial hydraulic applications.

Technical Specifications
Specifications 03  06  10 
Maximum Operating Pressure(MPa) Oilports A, B, X 31.5 
Oilports Y 0 Mpa return to oil tank
Working pressure(Mpa) 7, 16, 25, 31.5
Max.Flow(L/min) 200  400  600 
Working Fluid Mineral oil phosphate-ester
Fluid temp. (℃) -20~70
Viscosity(mm²/s) 15~380
Hysteresis (%) <2
Repeatability (%) <2
Linearity(%) ≤3.5
Working Voltage(V) DC 24
Rated Current(mA) 750 
Coil Resistance (Ω) 19.5 
Insulating grade IP 55

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Specification Mounting Screws Amount Tightening Torque
GDBY-03 M12x45-12.9 130 Nm
GDBY-06 M16x50-12.9 310Nm
GDBY-10 M18x50-12.9 430Nm

Specification B1 B2 L1 L2 L3 L4 L5 L6 L7 L8 L9 L10 L11 L12 L13 L14 D D1 D2 D3
GDBYJ-03 85  54  98.5  91.5  67  54  23.5  141.3  22.1  47.5  14  212  22.1  20  12  M12
GDBYJ-06 100  69.8  122.2  117.5  83.7  66.7  26.5  153.8  23.8  11.1  55.6  11  224.5  33.3  25  25  M16
GDBYJ-10 115  82.5  154.5  149.5 106.9  88.9  28.1  164.5  31.8  12.7  76.2  9.4  235.2  44.4  30  32  M18

OEM / ODM Customization

We provide OEM and ODM services for hydraulic equipment manufacturers and system integrators, including:

·Customized pressure adjustment ranges
·Electrical coil and connector options
·Mounting interface customization
·Product marking and packaging solutions
·Technical support based on hydraulic circuit requirements

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 Proportional Pilot Operated Relief Valve used for?
An Explosion-Proof Proportional Pilot Operated Relief Valve is used to control and regulate hydraulic system pressure through proportional electrical signals, especially in industrial environments requiring explosion-proof operation.

2. What is the advantage of a pilot-operated relief valve design?
The pilot-operated structure provides more stable pressure control and is suitable for hydraulic systems with higher flow requirements compared with direct-operated pressure valves.

3. What are the standard electrical specifications of this valve?
The standard configuration uses DC 24 V power supply with a 750 mA rated current and an IP55 protection rating.

4. Which hydraulic fluids can be used with this valve?
The valve is compatible with mineral hydraulic oil and phosphate ester hydraulic fluid commonly used in industrial hydraulic systems.

5. Can the Explosion-Proof Proportional Pilot Operated Relief Valve be customized for different systems?
Yes. The Explosion-Proof Proportional Pilot Operated Relief Valve can be customized according to pressure requirements, electrical configuration, mounting conditions, and specific hydraulic system applications.

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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