Description
RELAY EMERGENCY VALVE (CHARGING STYLE, RATIO FEATURE – 4.5 PSI CRACK)
PART NUMBER(S):
Fleet Products: 110205-G (New) | OE: Sealco 110205 | Meritor: RSL110205, RSL110205X | Euclid: ESL110205, ESL110205X
DESCRIPTION:
Model: Relay Emergency Valve – Charging Type with Ratio Feature
Vehicles: Heavy-duty trailers and trucks with air brake systems using single (service-only) brake chambers
• Supply Port: 3/8" NPT
• Control Port: 3/8" NPT
• Reservoir Port: 3/4" NPT
• Delivery Ports: (4) x 3/8" NPT
• Crack Pressure: 4.5 PSI
• Valve Style: Charging
• Ratio Feature: 1:1 control to delivery under normal braking, 1:1.5 boost during panic stops for <0.01 sec before returning to 1:1
• Weight: ~5.5 lbs
• Function: Acts as a fast-acting relay between the reservoir and service chambers; maintains braking pressure balance during emergency operation
• Compliance: For pre-FMVSS-121 systems (non-protected reservoir configuration)
Applications:
Need a responsive emergency relay valve for older trailer or truck setups? The 110205-G provides quick air delivery and consistent braking performance. With a built-in ratio feature and charging-style reservoir fill, it’s engineered for fast reaction times during high-demand braking. Perfect replacement for Sealco 110205 and cross-compatible OEMs meeting 4.5 PSI crack specification.
CROSS-REFERENCE(S):
110205, 110205X, 110205N, 110205RX, 110205SEA, 110205P, 110470, 11675, 12350, 229434, 277446, 39540285, 55110205, 680-110205, 745-110205X, 7546-110205, 745-277446, 6152-55110205, 034069, 110200, 110200X, A99036, AF71890, AV110205, AV-110205, BAR110205X, BEP110205X, BEPCO110205X, BWP M-110205, BX110205X, BW110205X, BW R110205X, BW 110205X, DAYTON AV110205, E-SL110205, E-SL110205X, E-SL110470X, ESL110205, ESL110205X, ESL110470X, GN110205, GDX110205, GTA-110205, GTA110205, H110205X, HDX110205X, KN30000, KN30010, KN30300, KN30400, K110205, LEV-3640, MTRRSL110205, MTRRSL110205X, MTRRSL110470X, MSV110205, MID110205X, MID110470X, MJ110205, N3714J, RSL110205, RSL110205X, RB110205, RB-110205, RL3527FC, S-20156, S20156, SA110205, SC110205, SE0110205, SEA110205, SEA110470, SEA110205X, SEA110470X, SLC110205, SL110205, SL-110205, SL110470, SL-110470, Tectran 14412, TDARSL110205, Torque TR110205, TR110205, TKL25011A, TV110205, TV110205TEC, VTC-01562, WA110205, ZZ110205X, World American WA110205, Automann 170.110205, AM170110205, Pro-Par PROVA-110205, Genuine Newstar S20156, Genuine Newstar SEA-110205, Freightliner TDARSL110205, Power Products 110205P, Rockwell International ESL110205, SAF-Holland 55110205, Mack 802552, PAP802552, STT 110205, and A100042352.
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:
✔ Designed for heavy-duty trailer or truck air systems with 4-port delivery and 3/8" NPT control/supply.
✔ Charging-type valve fills reservoirs directly from supply—ensure proper system compatibility.
✔ Do not use on converter dollies, turntable axles, or lift axles.
✔ Verify 4.5 PSI crack pressure and ratio function before installation.
✔ KN30400 and KN30400X are alternative replacements for this configuration.
✔ Plug unused ports and use appropriate NPT thread sealant during installation.
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Warranty Information
