XQF22 Aluminium Hydraulic Limiting Valve

truck parts XQF22 Aluminium Hydraulic Limiting Valve

Core Features & Advantages

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  Lightweight & High-Strength Aluminium Construction: Machined from high-purity 6061-T6 aluminium alloy, offering excellent corrosion resistance, heat dissipation, and mechanical strength. 30% lighter than steel valves, reducing overall system weight without compromising durability.

• Precision Pressure Control: Equipped with a high-sensitivity spool valve and adjustable pressure setting mechanism, pressure control accuracy within ±0.5 MPa. Supports pressure adjustment within the range of 5-30 MPa to meet diverse system requirements.

• Reliable Overflow Protection: Instantly opens the overflow channel when system pressure exceeds the set threshold, diverting excess fluid back to the reservoir. Prevents hydraulic component damage caused by pressure spikes, ensuring system safety.

• Low Flow Resistance & High Efficiency: Optimized internal flow channel design, flow resistance ≤0.3 MPa at rated flow, hydraulic efficiency ≥95%. Minimizes energy loss and improves the responsiveness of the hydraulic system.

• Sealed & Leak-Proof Design: Adopts automotive-grade NBR rubber seals and precision mating surfaces, achieving IP67 waterproof and dustproof rating. No fluid leakage even under high pressure and extreme temperature conditions.

• Wide Environmental Adaptability: Resists corrosion from hydraulic oil and harsh working environments; operates stably in the temperature range of -40℃ to +120℃, adapting to alpine, desert, and humid coastal areas.

Basic Parameters

Technical Parameters (Typical Values)

• Material Specifications

Valve Body: High-purity 6061-T6 aluminium alloy, precision CNC-machined for dimensional accuracy. Anodized surface treatment enhances corrosion and wear resistance.

Spool: High-carbon chromium bearing steel (GCr15) with quenched and tempered treatment, ensuring excellent wear resistance and fatigue life under high-frequency reciprocating motion.

Seals: Automotive-grade NBR rubber, resistant to hydraulic oil, high temperature and aging. Compatible with mineral oil-based and synthetic hydraulic fluids.

• Pressure Performance

Adjustable Pressure Range: Stepless adjustment via built-in pressure regulating screw (with locking nut for anti-loosening).

Pressure Control Accuracy: High-precision regulation at rated flow, maintaining stable system pressure without fluctuation.

Overflow Response: Instant overflow protection activation when pressure exceeds the set threshold, effectively preventing hydraulic shock.

• Flow Characteristics

Rated Flow: Wide range coverage, customizable for special requirements.

Flow Resistance: Optimized internal streamline flow channel design minimizes energy loss and ensures high hydraulic efficiency.

Flow Stability: Smooth fluid flow with low turbulence, reducing noise and cavitation risk.

• Environmental Adaptability

Temperature Adaptability: Wide operating and storage temperature ranges, maintaining stable performance in extreme cold and high-heat conditions without structural deformation or material degradation.

Corrosion Resistance: Excellent resistance to harsh environments (coastal, humid, dusty), passing professional salt spray testing.

• Interface & Installation

Connection Standard: SAE 10 or SAE 12 female thread, compatible with standard hydraulic fittings and featuring high thread accuracy.

Installation Flexibility: Universal mounting orientation (horizontal/vertical), adapting to diverse system layouts without angle restrictions.

Secure Fixation: Standard threaded mounting holes for reliable and stable installation.

• Physical & Electrical Properties 

Lightweight Design: Compact and lightweight structure reduces overall system load.

Low Noise Operation: Quiet performance improves working environment comfort.

Vibration Resistance: Complies with road vehicle vibration standards, maintaining stable performance under high-vibration conditions.

Application Scenarios

Widely used in commercial vehicle and industrial hydraulic systems:

• Heavy-duty truck braking systems: Prevents brake fluid overpressure, ensuring stable braking performance
• Engineering machinery (excavators, loaders) hydraulic circuits: Protects lifting and steering systems from pressure damage
• Bus and passenger car hydraulic suspension systems: Maintains stable pressure for comfortable riding experience

Industrial hydraulic equipment: Suitable for hydraulic presses, conveyors, and other machinery requiring pressure limiting and overflow protection

A cost-effective and reliable hydraulic control solution, ideal for fleet operators, maintenance service providers, and equipment manufacturers seeking high-performance pressure control components.