Description
KN30300 – EMERGENCY RELAY VALVE (CHARGING TYPE)
PART NUMBER(S):
Fleet Products: KN30300-G | OE: KN30300, N4301AA | Automann:
DESCRIPTION:
Model: Emergency Relay Valve – Charging Type
Vehicles: Pre-121 trailers, converter dollies, exempt trailer configurations
• Function: Emergency relay valve (charging type) for non-FMVSS 121 compliant vehicles
• System: Charges emergency line; suitable for trailers with older brake system architectures
• Supply Port: 1 × 3/4" NPT (with nipple)
• Delivery Ports: 4 × 1/4" NPT
• Service (Emergency) Inlet: 1/4" NPT
• Auxiliary Reservoir Port: Plugged
• Crack Pressure: 3.0 PSI (new)
• Mounting: Standard; bracket may or may not be included
• Cover: Rotatable without impact on function/warranty
• Weight: Approx. 3 lbs
• OEM Part Number: N4301AA
Applications:
Designed for emergency braking systems on pre-121 trailers, converter dollies, and exempt trailers. Provides regulated delivery pressure and charges the emergency line. Best used in air brake systems where spring brake control is handled separately.
CROSS-REFERENCE(S):
KN30300, KN30300-G, RN10HL, N4301AA, 530782, 3217-KN30300, MIDKN30300, F224708, LEV-3635, AVKN30300, BW281860N, BND281860N, 281860N, 281860, MBI281865X, BAN281860N, BX281860N, RKN30300, SM3005WHBR, 745281860N, KN30010, N3714J, 1675, 30300
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:
✔ Charging-type valve – charges emergency line
✔ Not for use on FMVSS 121 compliant trailers
✔ Plugged auxiliary reservoir port; 3/4" NPT reservoir port with nipple
✔ Mounting bracket may or may not be included
✔ Cover rotation does not affect performance or warranty
✔ Use only in systems designed for charging relay valves
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Warranty Information
