Product Description
The Bendix K021562 SR-7 Spring Brake Modulating Valve is a heavy-duty pneumatic control valve designed for commercial vehicles equipped with dual-circuit air brake systems and spring brake actuators. This valve controls the application and release of spring brakes, helping maintain dependable parking and emergency braking performance.
The SR-7 provides rapid spring brake application during parking and modulates spring brake pressure if the primary service brake circuit loses pressure. Its integrated anti-compounding function helps prevent excessive mechanical forces caused by simultaneous service brake and spring brake applications.
Featuring a 1/2-inch NPT supply port, four 3/8-inch NPT delivery ports, and 1/4-inch NPT control connections, the K021562 provides the specific pneumatic configuration required for compatible commercial vehicle braking systems.
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Genuine Bendix SR-7 spring brake modulating valve
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Manufacturer Part Number: K021562
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Designed for dual-circuit air brake systems
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Rapid spring brake application during parking
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Modulates spring brake application during primary service brake circuit failure
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Integrated anti-compounding protection
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One 1/2"-14 NPT supply port
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Four 3/8"-18 NPT delivery ports
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One 1/4"-18 NPT service control port
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One 1/4"-18 NPT balance port
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One 1/4"-18 NPT parking control port
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Two 3/8"-16 UNC threaded mounting holes
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No mounting studs included
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Downward-facing exhaust with protective dust shield
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Spring brake hold-off pressure: 107 PSI
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Operating temperature range: -40°F to 200°F
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Meets applicable FMVSS 121 requirements
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New replacement valve
Common cross-reference numbers include Bendix 801570, K020745, Mack 20QE4192A, and Mack 21116666.
Before ordering, verify the original valve part number, port sizes, mounting configuration, and air line connections. SR-7 valves are available with different threaded and push-to-connect fittings and are not universally interchangeable.
