Description
K021559-G – SPRING BRAKE VALVE (SR-7)
PART NUMBER(S):
Fleet Products: K021559-G | OE: K021559, SR-7, 060-K021559 | Automann: 745-K021559
DESCRIPTION:
Model: SR-7 Spring Brake Valve
Vehicles: Designed for use in tractor and trailer dual-circuit air brake systems
• Valve Function: Modulates application/release of spring brakes
• Mounting Style: Stud mount (Thread: 3/8"-16, Length: 0.94")
• Supply Port: 1/2" NPT
• Delivery Port: 3/8" NPT
• Control Port: 3/8" Push-To-Connect (PTC), 90° fitting
• Balance Port: 3/8" PTC, straight fitting
• Park Control Port: 1/4" NPT
• Spring Brake Hold-Off Pressure: 107 PSI
• Weight: 2.99 lbs (1.36 kg)
• Dimensions: Height 4.88 in, Length 5.28 in, Width 5.39 in
• Material: Heavy-duty corrosion-resistant composite and cast housing
• Compliance: Designed to meet FMVSS-121 air system performance standards
Applications:
This SR-7 valve modulates the application and release of spring brakes in dual air circuit systems, ensuring rapid response for park and emergency brake engagement. Suitable for both on-road tractors and trailers using spring brake actuators. Offers integrated balance and park control functionality with push-to-connect ports for simplified installation.
CROSS-REFERENCE(S):
K021559, 060-K021559, 5010393, 5012472, 5012831, 5018545, K021248, K021458, K021459, 801536, BW K021559, BWK021559, 745-K021559, TWDBENK021559, BANK021559, BXK021559, S-27029, S27029, KO21559, 060-KO21559, K021559BXW, 670-S27029, BENK021559
A cross-reference listing means this part may be a compatible replacement for these part numbers based on OEM or distributor data.
IMPORTANT INSTALLATION NOTES:
✔ Mount using 3/8"-16 studs with torque per OEM spec
✔ Verify correct orientation of 90° control port prior to connection
✔ Use compatible push-to-connect fittings for PTC ports to avoid leaks
✔ Ensure pressure source provides minimum 107 PSI for proper brake release
✔ Test function after installation for pressure retention and spring brake modulation
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Warranty Information
