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  • Explosion-Proof Solenoid Unloading Relief Valve
  • Explosion-Proof Solenoid Unloading Relief Valve
  • PRODUCT DETAILS
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Specific Applications

·Hydraulic power units for petrochemical plants
·Offshore drilling and marine hydraulic systems
·Mining equipment operating in explosive environments
·Oil pipeline hydraulic control systems
·Chemical production equipment
·Explosion-proof industrial automation systems

Core Functions

Automatic Pressure Unloading
When the solenoid is energized, the valve unloads pump pressure according to the hydraulic circuit design, helping reduce unnecessary power consumption during standby operation.

Pressure Safety Protection
The integrated relief function limits excessive system pressure, reducing the risk of damage to pumps, cylinders, and hydraulic pipelines.

Designed for Hazardous Locations
The explosion-proof electrical design allows the valve to operate safely in environments containing flammable gases or combustible dust.

Compatible with Industrial Hydraulic Fluids
Suitable for mineral hydraulic oil and phosphate ester hydraulic fluid, meeting the requirements of many industrial hydraulic systems.

Industrial Electrical Protection
The valve is rated IP55, providing protection against dust ingress and water spray for reliable outdoor and factory operation.

Technical Specifications
Specifications 03  06  10 
Maximum Operating Pressure(MPa) Oilports P, X 35 
Oilports T(External leakage 30 
Oilports T (Internal leakage) 10 
Max.Flow(L/min) 10% 40  80  120 
17% 60      120      240
Working Fluid Mineral oil phosphate-ester
Fluid temp. (℃) -20~70
Viscosity(mm²/s) 15~380
Working pressure(Mpa) 5,10,20,31.5,35
Worhing voltage(V) DC 24 
※AC 110,220
Insulating grade IP 55

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Specification Mounting Screws Tightening Torque
GDYXW-03 4-M10×50-12.9 75Nm

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Specification Mounting Screws Tightening Torque
GDYXW-06 4-M16×100-12.9
2-M16×50-12.9
310Nm
GDYXW-10 4-M18×120-12.9
2-M18×80-12.9
430Nm

Specification L1 L2 L3 L4 L5 L6 L7 L8 L9 L10 L11
GDYXW-06 154  25  101.6  57.1  12.7  46  112.7  48.2  34  156  253.4 
GDYXW-10 199  42  127  63.5  12.7  50.8  139.7  698  37  201  275 

Specification B1 B2 B3 H1 H2 H3 H4 H5 D D1 D2
GDYXW-06 101  69.9  103  144  124  72  46  28  M16 18  25 
GDYXW-10 118.5  82.5  118.5  165  145  93  67  45  M18 20  32 

OEM / ODM Customization

To meet different hydraulic system requirements, we offer:

·Explosion-proof coil options for different voltage standards
·Customized pressure setting before delivery
·Hydraulic port and mounting configuration
·OEM branding and product packaging
·Technical support based on hydraulic schematics

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 the difference between an unloading relief valve and a standard relief valve?
An unloading relief valve can switch the hydraulic pump to an unloaded condition through electrical control, while a standard relief valve mainly limits the maximum system pressure.

2. Which hydraulic fluids can be used?
The valve is suitable for mineral hydraulic oil and phosphate ester hydraulic fluid.

3. Is this valve suitable for hazardous industrial environments?
Yes. It is designed for hydraulic systems requiring explosion-proof electrical operation and provides an IP55 protection rating.

4. Can the pressure setting be customized?
Yes. Different pressure settings and electrical configurations can be provided according to your hydraulic system requirements.

5. How do I choose the correct Explosion-Proof Solenoid Unloading Relief Valve?
Please provide the working pressure, hydraulic fluid, voltage, hazardous area requirements, and installation method. Our engineers will recommend the appropriate Explosion Solenoid Unloading Relief Valve model.

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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