The Alltrux ATXA143 R-7 Relay Valve replaces OEM R-7 and is designed as a service replacement for heavy-duty truck air brake systems. It helps relay and regulate air pressure from the brake control valve to the service brake chambers, supporting faster brake response, balanced air delivery, and reliable braking performance in fleet and vocational environments.

R-7 relay valves play a critical role in air brake operation by reducing brake application lag and ensuring sufficient air volume is delivered quickly to the brake chambers. As original relay valves wear internally, develop air leaks, or become contaminated by moisture and debris, braking response and system efficiency can be negatively affected. Replacing worn relay valves helps restore proper air flow control, improve brake timing and balance, and reduce unplanned service events.

KEY FEATURES
• Designed for heavy-duty truck air brake relay and pressure control applications
• R-7 style relay valve helps speed brake response and improve air delivery
• Durable construction suited for fleet, vocational, and on-highway use
• Brand: All Makes
• Verify compatibility and application requirements before ordering

TECHNICAL SPECIFICATIONS
Alltrux Part Number: ATXA143
OEM Reference: R-7
Product Type: R-7 Air Brake Relay Valve
Brand: All Makes
System Application: Heavy-Duty Truck Air Brake System

CROSS REFERENCES
03081, 103081, 103081N, 103081RX, 103081X, 103081XX, 283932, 283932X, 296154, 3081, 3081X, 3081XX, 3932X, 4226020, 5009043, 5396103081X, BE103081, BE103081X, BEN103081, BG283932X, BH103081, BP283932, BW103081, BW103081X, BW283932, BW283932X, BWBW103081, BWBWR103081, BWR103081, BWR103081X, BWR283932, BX103081, BX103081X, BX283932, BX283932X, BXR103081, BXR103081X, BXR7, BXX103081, D283932X, E2HT2B431AA, EBN283932X, EUEBN283932X, HT2B431AA, MD103081X, MD283932X, MI103081, MI5396103081X, MID283932X, N103081, OR103081, OR103081X, OTR103081, P103081, R103081, R103081X, R283932, R955103081N, X103081, AV103081

Note: Confirm OEM and reference numbers along with application details before ordering to ensure proper fit and air brake system compatibility.