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  • Solenoid Unloading Relief Valve
  • Solenoid Unloading Relief Valve
  • PRODUCT DETAILS
  • FAQ
Specific Applications

·Hydraulic power units and hydraulic stations
·Injection molding machines
·Hydraulic presses and forming equipment
·Industrial automation systems
·Machine tools and hydraulic equipment

Core Functions

Automatic Hydraulic Unloading Control
The valve controls the unloading operation through an electrical solenoid signal, allowing hydraulic systems to switch between pressure operation and unloading status automatically.

Pressure Relief and System Protection
The integrated relief function helps limit excessive hydraulic pressure and protect system components. The BUC GW series is designed for industrial hydraulic applications requiring reliable pressure control.

Reduced Pump Load During Standby
By unloading hydraulic pressure when the system does not require full operation, the valve helps reduce unnecessary energy consumption and improve operating efficiency.

Stable Flow Performance
The valve supports high-flow hydraulic circuits. For example, the BUC GW-03 model provides a maximum flow rate of 90 L/min (23.78 gpm) and supports a maximum pressure of 250 bar..

Technical Specifications
Model Number Maximum Pressure(bar) Minimum adjustment pressure Maximum Flow Rate
(Ipm)
Weight
(kg)
BUCGW-03 250(3571 psi) Please refer to the minimum adjustment pressure characteristics. 90(23.78gpm) 12.6 
BUCGW-06 125(33.02gpm) 13.6 
BUCGW-10 250(66.05gpm) 19.6 

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OEM / ODM Customization

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

·Customized valve configuration according to hydraulic circuit requirements
·Solenoid voltage and electrical specification customization
·Port size and connection type adjustment
·Product labeling and packaging customization
·Production based on customer drawings or technical specifications

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 a Solenoid Unloading Relief Valve used for?
A Solenoid Unloading Relief Valve is used to control hydraulic pressure unloading through electrical signals. It helps hydraulic systems reduce pump load during standby operation while maintaining stable pressure control.

2. What models are available in the BUC GW series?
The BUC GW series includes BUC GW-03, BUC GW-06, and BUC GW-10 models. Customers can select the suitable model according to system pressure, flow rate, and hydraulic circuit requirements.

3. What parameters should be considered when selecting this valve?
Important selection factors include maximum pressure, flow rate, installation dimensions, solenoid specifications, hydraulic system design, and operating conditions.

4. Can this valve be customized for OEM projects?
Yes. OEM customization options include valve configuration, electrical specifications, connection requirements, labeling, and packaging solutions based on customer application needs.

5. How can I choose the right hydraulic valve model?
Provide information about your hydraulic system, including operating pressure, flow rate, equipment type, and installation requirements. Technical support can help match the appropriate valve 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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