Air Brake Relay Valve Wm147L 130845

This relay valve controls air flow in medium- to heavy-duty air brake systems. It’s a normally-closed, three-way non-compensating valve that opens when pilot pressure (35–45 PSI) is applied, directing supply air to the brake chambers. An internal breather port allows pressure to exhaust when pilot pressure drops, helping maintain safe brake function.

• Type: Normally-closed, three-way air relay valve
• Pilot Activation Pressure: 35–45 PSI
• Supply Function: Delivers supply air to outlet when activated
• Exhaust Function: Pressure is released through internal breather when deactivated
• Design: Non-compensating (does not maintain outlet pressure)
• Confirm compatibility with specific vehicle model before installation

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