Description
PART NUMBER(S):
Fleet Products: 110170-G (New) | OE: Sealco 110170, Haldex KN26000X, Meritor RSL110170
DESCRIPTION:
Model: Ratio Relay / Spring Brake Control Valve
Vehicles: Trailers with dual air reservoirs for spring and service brake systems
• Supply Port: 3/8" NPT
• Control Port: 3/8" NPT
• Reservoir Ports (A & B): (2) x 1/2" NPT
• Delivery Ports: (4) x 3/8" NPT
• Port Orientation: Supply & control ports offset 90° from reservoir ports
• Weight: ~3.1 lbs
• Function: Combines spring and service brake functions, using a protected reservoir system that maintains air supply from the secondary tank in case of a single circuit failure
• Compliance: Meets FMVSS 121 (Docket 90-3)
Applications:
Is this valve compatible with your trailer’s air brake system? Yes—this remanufactured Sealco 110170-G ratio relay valve is engineered for trailers requiring dual-reservoir control of parking and emergency brakes. It maintains consistent air delivery and balanced braking performance while protecting against single-circuit air loss. Ideal for standard and heavy-duty trailer configurations meeting FMVSS 121 safety standards.
CROSS-REFERENCE(S):
110120, 110140, 110147, 110170, 110180, 110190, 111180, 111190, 112170, 112180, 112190, 101112, 101121, 101622, 287375, 287376, 2991080, AV110170, E-SL110170, ESL110170, ESL110170X, BW110170X, SLC110170, GTA110170, BWPM-110170, HALKN26000X, MTAKN26000, SEA110170, TRS51301, 12360, 12361, KN26000, KN26000X, K110170, RSL110170, WA110170, TWD110170, 55110170, S-11417, 401185, TV110170, SA110170, SE110170, 39540500
A cross-reference listing means this part is a suitable replacement for the part numbers listed. Please confirm all ports and dimensions match your application before installing.
IMPORTANT INSTALLATION NOTES:
✔ Confirm all 3/8" and 1/2" NPT port orientations match your existing valve.
✔ Complies with FMVSS 121—verify dual-reservoir setup for proper operation.
✔ KN26000X valve may be used as a substitute for this application.
✔ No repair kits available—replace entire unit if defective.
✔ Apply thread sealant to all NPT fittings during installation.
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Warranty Information
