Excel EM56880 Mack 745-065146 Relay Valve

Relay Valve BP-R1 (2) 1/2in 14 Delivery Ports (2) 3/8in-18 Delivery Ports (2) 1/2in-14 Supply Port (1) 1/8in-27 Control Port (1) 1/4-18 Service Port

• Part number: EM56880
• OE MFG: MACK
• OEM Reference: 745-065146
• Cross Reference: OTHER : 745-065146
• Product Class: Air Valves & Kits

The PAI EM56880 is a BP-R1 relay valve identified with Mack reference 745-065146. Relay valves are heavy duty diesel truck parts that use a control signal to regulate compressed-air delivery within a vehicle braking system, placing air closer to the service brakes for direct actuation. This configuration includes two 1/2-14 delivery ports, two 3/8-18 delivery ports, two 1/2-14 supply ports, one 1/8-27 control port, and one 1/4-18 service port, providing key thread and port details for matching the valve to the intended air circuit.