Pressure Relief Valve

Pressure Limiting Valve — Heavy Commercial Vehicle Brake System Parts

The pressure limiting valve is a critical and essential component of the brake system in heavy commercial vehicles. It regulates the compressed air coming from the air compressor, ensuring that system pressure remains at a safe level and preventing excessive pressure buildup. Without this valve, excessive pressure can cause serious damage to pipes, fittings and other brake system components. The correct and safe operation of the brake system depends entirely on the healthy functioning of this component.

The pressure limiting valve is available in various options for heavy commercial vehicles. As a complete valve product, it comes ready with all internal components and is suitable for direct installation, allowing you to put it into immediate use. Repair kits help extend the life of your existing valve by including critical parts such as seals, springs and gaskets. Individual spare parts are preferred when a specific component fails or wears out.

• Complete pressure limiting valve — Ready with all internal parts, direct installation
• Valve repair kits — Option to restore and extend the life of your existing valve
• Individual spare parts — Part replacement and renewal as needed

Designed for heavy commercial vehicles, this valve offers broad compatibility with leading truck and bus manufacturers. Knowing your vehicle's brake system type and configuration is important for making the right choice. Periodic maintenance and annual inspection programs ensure long-term valve performance and enable early detection of unexpected failures. Maintenance with quality spare parts optimizes both safety and cost.

Frequently Asked Questions

What is the purpose of the pressure limiting valve? It controls and regulates system pressure to ensure safe operation of the air brake system.

How does the valve relate to other brake system components? It controls and regulates the pressurized air coming from the air tank. All brake system components—including the air tank, anti-lock braking system, electronic control unit, brake proportioning valve, exhaust brake and dual-circuit valve—operate based on the pressure value set at this valve.

When should it be replaced? If you experience a drop in brake pressure, notice system leakage or experience delays in brake response, have the valve checked. Under normal operating conditions, it can be used for years with a repair kit.

How to select the correct pressure limiting valve? Selection based on your vehicle's full model number, engine type and brake system configuration directly affects braking performance and safety.

How should maintenance and inspection be performed? Annual maintenance inspections, cleaning of internal components, examination of sealing elements and measurement of system pressure are mandatory operations.

What are the signs of failure? Increased stiffness in the brake pedal, abnormalities in pressure gauges, system leaks and delays in brake response are the main indicators of failure.

Can spare parts and repair kits be purchased separately? Yes, you can choose and purchase the complete valve, repair kit or individual spare parts according to your needs.