Quick Release Valve – Rapid Pressure Exhaust Unit for Semi-Trailer Parking Brakes

Description

The Quick Release Valve (Part No. 9735000510) is a critical pneumatic exhaust component in semi-trailer parking brake systems, designed to ​instantly discharge residual air pressure from brake chambers, ensuring rapid brake disengagement. Featuring a ​high-strength cast aluminum body (sandblasted & oxidized) and ​stainless steel spring (≥3 million cycles), it operates at ​0.4~1.2MPa with ≤0.2s response time and ≤0.08mL/min leakage (@1.0MPa), compliant with ISO 16029 and SAE J1467. ​FKM main seals (-30℃~180℃) and ​PTFE guide rings resist vibration, water ingress, and brake fluid (DOT4) corrosion.

Core Functions:

1. ​Rapid Exhaust: 8mm orifice reduces pressure from 0.8MPa to 0.1MPa in 0.5s.
2. ​Reverse Blocking: Integrated check valve prevents backflow interference.
3. ​Diagnostic Ready: M12 port supports pressure release data logging via diagnostic tools.

Key Importance:

• ​Brake Efficiency: Delayed exhaust risks brake drag and overheating.
• ​Material Impact:
  • ​Lightweight: Aluminum body reduces weight by 45% vs. cast iron.
  • ​Seal Resilience: FKM maintains elasticity at -30℃.
  • ​Anti-Corrosion: 50μm epoxy coating withstands ≥1000h salt spray.

Replacement Guidelines:

1. ​Orientation: Align valve arrow with airflow.
2. ​Leak Test: Post-installation pressure drop ≤0.03MPa @1.5MPa/3min.
3. ​Lubrication: Use synthetic silicone grease (e.g., Krytox GPL 205).
4. ​Maintenance: Clean 100-mesh filter every 3 months or 20,000 km.