European Release Valve Manufacturers

European Release Valve – Precision Pneumatic Control for Commercial Vehicles

Zhejiang Gongzheng Machinery Co., Ltd. is a professional European Release Valve manufacturer and supplier, specializing in high-quality pneumatic release valves for truck and trailer air brake systems. Our product range covers DAF, KRONE, SCANIA, SCHMITZ and universal European series, designed for parking brake release, emergency release and quick-release applications. With a 30,000 m² factory, IATF certification and in-house R&D, we deliver reliable, factory-direct solutions for OEM and aftermarket projects.

Our European Release Valve Range

We supply the following release valve types, each engineered for specific vehicle platforms and operating conditions:

Application Fit & Process Considerations

European release valves are used in air brake systems to vent spring brake chambers for vehicle movement. Our valves are designed for:

• Parking brake release – manual or pneumatic control for daily operation.
• Emergency release – allows towing or movement when air supply is lost.
• Quick-release function – rapid exhaust for faster brake response in trailer systems.

We match each valve to the vehicle’s pneumatic circuit pressure (typically 8–12 bar), port size (M22×1.5, 1/4" BSP, etc.) and mounting configuration. Our valves are compatible with standard European air brake systems from WABCO, Knorr-Bremse and equivalent platforms.

Critical Specifications & Quality Assurance

Each release valve is manufactured under IATF 16949 quality management. Key parameters we control:

• Operating pressure range: 0–12 bar (tested to 1.5× rated pressure).
• Temperature range: -40°C to +80°C (all-weather models).
• Flow capacity: up to 2000 L/min at 6 bar (high-flow models).
• Leakage rate: < 10 cm³/min at rated pressure.
• Cycle life: > 500,000 cycles (internal validation).

We perform 100% functional testing on every valve – cracking pressure, reseat pressure, external leakage and manual override operation. Materials include corrosion-resistant aluminum alloy bodies, stainless steel springs and NBR/EPDM seals suitable for compressed air with standard filtration.

Configuration, Automation & Integration

Our release valves are available with manual knob (black, green, yellow) or pneumatic pilot control. For automated systems, we offer versions with integrated solenoid pilot valves (12V/24V) for remote release from cab or PLC. We can also combine release valve functions with charging or pressure-limiting features to reduce plumbing complexity.

We support European Commercial Vehicles product families including European Relay Valve and European Trailer Valve for complete system integration.

Installation, Maintenance & Service

All valves are supplied with mounting brackets and port fittings per customer specification. Installation follows standard pneumatic practice – ensure clean, dry air and proper torque (25–35 Nm for M22 ports). Recommended maintenance: inspect seals and manual override function every 100,000 km or annually. We stock spare parts (seal kits, knobs, springs) for all models.

Information We Use to Configure Your Solution

To prepare a precise quotation and valve configuration, we need the following project data:

• Vehicle make, model and year (e.g., DAF XF, SCANIA R-series, KRONE trailer).
• Original part number or sample for cross-reference.
• Required function: parking release, emergency release, quick release or combined.
• Control type: manual knob (color preference) or pneumatic/electric pilot.
• Port size and thread standard (metric, BSP, NPT).
• Operating temperature range and environmental exposure (off-road, extreme cold).
• Annual volume and delivery schedule (OEM or aftermarket).

Submit these details via our inquiry form, and our engineering team will respond with a datasheet, dimensional drawing and commercial offer within 48 hours.

Frequently Asked Questions