ABS Double Relay Valve

ABS Double Relay Valve — Balanced Air Distribution in the Brake System

The ABS double relay valve is a control component in the air brake assembly of trucks and buses that ensures pressurized air reaches two separate brake circuits equally and without delay, and it is a subgroup of the Brake System category. Converting electronic commands from the ABS unit into airflow, this valve helps distribute braking force evenly between axle groups, supporting stable vehicle stopping. Since it manages two independent circuits within a single body, a fault in one circuit does not affect the other.

The product range includes complete ABS double relay valve housings, internal diaphragm and gasket sets, valve pistons with spring assemblies, and connection fittings. Housing sizes vary according to vehicle type and brake circuit layout, offering options suitable for tractor, semi-trailer, and bus applications.

• Complete ABS double relay valve housing and mounting kit
• Internal diaphragm, gasket, and seal sets
• Valve piston, spring, and control mechanism parts
• Air inlet-outlet fittings and connection components

Manufactured with general compatibility in mind for major truck and bus brands, choosing a model that matches the vehicle's brake circuit diagram and the existing valve's connection layout is important for these parts. The correct ABS double relay valve selection should consider not only size compatibility but also synchronized operation with the system's other components. Checking the valve when symptoms such as air leaks, delayed response, or uneven braking are noticed extends the service life of the brake system.

Frequently Asked Questions

What is an ABS double relay valve? It is a brake system component that delivers pressurized air equally and evenly to two separate brake circuits, converting ABS commands into airflow.

What are the symptoms of ABS double relay valve failure? Uneven stopping during braking, air leak sounds, delayed brake response, and weak braking on one axle group can indicate a fault in this valve.

When should the ABS double relay valve be replaced? The valve needs renewal when the internal diaphragm tears, air leakage persists, or an uneven pressure distribution between circuits is detected.

How do you choose the right ABS double relay valve? The correct choice is made by selecting a model that matches the vehicle's brake circuit diagram, the existing valve's connection dimensions, and housing type.

How does the ABS double relay valve relate to the other parts of the system? It converts signals from the ABS electronic control unit into air pressure, working together with the ABS relay valve and air tank to support the coordinated operation of components such as the leveling device and exhaust brake.

How is the ABS double relay valve maintained? During periodic inspection, air leaks, diaphragm condition, and the tightness of connection fittings should be checked to monitor early signs of wear.

What happens if the ABS double relay valve is not replaced? If the faulty valve remains in use, braking imbalance increases and force distribution between axle groups deteriorates; timely replacement after inspecting suitable parts is therefore recommended.