Double Pilot Operated Check Valve

Our double pilot operated check valve (also known as dual hydraulic lock valve) is a high-performance hydraulic control component designed for load holding in hydraulic systems. It effectively locks the hydraulic cylinder or motor in position, preventing unwanted drifting, sliding or sinking caused by external loads, ensuring the safety and stability of equipment such as cranes, lifts and construction machinery. Manufactured with premium materials and precision machining, this valve delivers exceptional pressure resistance, zero leakage performance, fast response and long service life. We provide fully customized solutions, including various nominal diameters, pressure ratings, interface specifications and structures, to meet the unique load holding needs of different hydraulic systems and equipment. Widely used in construction machinery, lifting platforms, sanitation vehicles and other industrial fields, it is an essential safety component for hydraulic systems with suspended loads.

Key Features

1. Reliable Bidirectional Load Holding: The dual pilot operated spool structure ensures reliable locking of the hydraulic circuit in both directions, effectively preventing load drift and sliding, ensuring equipment safety.

2. Zero Leakage Sealing Performance: High-precision spool and advanced sealing structure ensure zero leakage under high pressure, maintaining load position for a long time without pressure loss.

3. Fast Response & Smooth Operation: Optimized pilot control design enables fast opening and closing response, ensuring smooth operation without impact during system start and stop.

4. High Pressure & Impact Resistance: High-strength steel valve body, with a rated pressure up to 35MPa (5076psi), suitable for high-load hydraulic systems, with excellent impact resistance and fatigue resistance.

5. Compact & Integrated Design: Compact block structure, easy to install and integrate into hydraulic systems, saving installation space and simplifying pipeline layout.

6. Wide Compatibility: Compatible with various hydraulic oils and fluids, stable performance in high and low temperature environments, suitable for different working conditions.

7. Fully Customizable Solutions: Support full customization of nominal diameter, pressure rating, thread interface, structure, pilot ratio and material, to meet special application requirements.

Custom Machining Services

We provide one-stop custom machining services for double pilot operated check valves, to meet all your personalized hydraulic load holding needs:

• Custom Pressure Rating: 25MPa, 31.5MPa, 35MPa, etc., to meet different high-pressure system requirements.

• Custom Material: Carbon steel, alloy steel, stainless steel, etc., to meet different corrosion resistance and strength requirements.

• Custom Interface & Thread: Standard thread (SAE, NPT, BSP, G, metric), flange connection, etc., compatible with global hydraulic system standards.

• Custom Nominal Diameter: DN6, DN10, DN15, DN20, DN25, etc., to match different pipeline and flow requirements.

• Custom Structure & Function: Single/double pilot, with/without check valve, integrated valve block, etc., to meet different system needs.

• Custom Surface Treatment: Nitriding, quenching, zinc plating, nickel plating, phosphating, etc., to improve wear resistance and corrosion resistance.

• Custom Batch & Lead Time: Support small batch trial production and mass production, with flexible lead time to meet your project schedule.

Technical Advantages

• Advanced Hydraulic Design: The unique spool and pilot structure design ensures stable load holding, low pressure loss and high efficiency, improving system safety and performance.

• Precision Machining: Adopt CNC precision machining technology to ensure high dimensional accuracy and tight tolerance, ensuring reliable sealing and stable operation.

• Strict Quality Control: Each product undergoes strict pressure testing, leakage testing, fatigue testing and performance calibration, complying with international hydraulic industry standards (ISO, DIN), ensuring stable and reliable performance.

• Professional Engineering Support: Our engineering team has rich experience in hydraulic valve design and system integration, providing professional design suggestions and technical support for your custom projects.

Application Scenarios

• Construction Machinery: Cranes, excavators, loaders, aerial work platforms, boom trucks, etc.

• Lifting & Material Handling Equipment: Forklifts, lift tables, hoists, scissor lifts, etc.

• Special Vehicles & Sanitation Equipment: Garbage trucks, fire trucks, hook lift trucks, etc.

• Industrial Hydraulic Systems: Hydraulic presses, machine tools, metallurgical equipment, mining machinery, etc.

• Other Industrial Fields: Agricultural machinery, marine equipment, new energy equipment, etc.

Product Structure

• Valve Body: High-strength steel or stainless steel valve body, pressure-resistant and durable, with surface anti-corrosion treatment.

• Dual Pilot Operated Spools: Precision-machined dual spools, realizing bidirectional load holding and pilot control function.

• Sealing System: High-performance sealing rings and sealing structure, ensuring zero leakage under high pressure and long-term operation.

• Hydraulic Ports: Standard or custom threaded ports, easy to install and connect with hydraulic pipelines and cylinders.

• Adjustment Caps: Optional adjustment caps for pressure setting and maintenance.

Custom Order Process

1. Inquiry & Requirement Confirmation: Provide your product requirements (pressure, size, connection, material, quantity, etc.) or drawings.

2. Design & Quotation: Our engineering team will evaluate the feasibility, provide design suggestions and quote the price.

3. Sample Confirmation: Produce samples for your inspection and performance test confirmation, and adjust according to your feedback.

4. Mass Production: After sample confirmation, arrange mass production, and strictly control the quality during the production process.

5. Inspection & Delivery: Conduct full inspection of the products (pressure test, leakage test, performance test, etc.), and deliver them after passing the inspection, with complete quality documents.

6. After-sales Service: Provide long-term after-sales technical support, installation guidance and product warranty service.