Bendix Brakes K021562 SR-7 Air Brake Spring Brake Modulating Valve

The Bendix SR-7 (K021562) is a genuine OEM air brake spring brake modulating valve designed for medium- and heavy-duty commercial trucks, tractors, trailers, and buses. This valve modulates the spring brakes through the service brake system in the event of a service brake failure, and is engineered to prevent service and spring braking forces from compounding — a critical safety function in air brake systems.

Key Features:

• Anti-compounding design — prevents simultaneous application of service and spring brake forces
• Port configuration: one park control port (1/4" NPT), one service control port (1/4" NPT), one supply port (1/2" NPT), one balance port (3/8" NPT), and four delivery ports (3/8" NPT)
• Diaphragm-protected exhaust port for added durability in harsh environments
• Mounting: two 3/8"-16 UNC-3B mounting studs for frame rail or cross member installation
• Operating temperature range: -40°F to 200°F (-40°C to 93°C)
• FMVSS 121 compliant — meets Federal Motor Vehicle Safety Standards for air brake systems
• Manufactured to ISO 9001/TS 16949 quality standards
• New unit — no core charge required

Cross-Reference Part Numbers: K021562, K020745, 745-K021562, BXK021562, BWK021562, 801570, 5010392, 20QE4192A, 21116666, 706477AT

As a genuine Bendix component, the SR-7 modulating valve is engineered and tested to deliver maximum reliability and longevity in demanding commercial vehicle applications. It is a direct OEM-quality replacement for aging or failed spring brake valves on a wide range of heavy-duty platforms.