Description
KN28500-G – RG-2 RELAY VALVE – 3/8" NPT PORTS, 5.6 PSI CRACKING PRESSURE
PART NUMBER(S):
Fleet Products: KN28500, KN28500-G
OE: KN28500, F224720, LRV-3637
Automann: 177.28500
DESCRIPTION:
Model: RG-2 Relay Valve
Vehicles: Compatible with tractors and trailers equipped with air brake systems
• Supply Ports: Two 3/8" NPT
• Delivery Ports: Two 3/8" NPT
• Control Port: One 1/4" NPT
• Mounting Holes: Two 0.34" diameter holes on 1.50 inch centers
• Cracking Pressure: 5.6 ± 1.0 PSI
• Opening Pressure: 6 PSI
• Control Port Position: 90°s relative to delivery ports
• Plugs Included: One 3/8" NPT plug
• Dimensions: Length – 3.5", Width – 3.5", Height – 3.625"
• Actuation Type: Pneumatic relay valve
• Function: Fast-acting relay valve used to apply and release service brakes on tractor or trailer
• Housing Features: Compact size, durable construction, cover may be rotated without affecting warranty or performance
• Included Hardware: Universal mounting bracket
• System Fitment: Tractor and trailer air brake systems
• OEM Reference: N30108BC
Applications:
This compact RG-2 relay valve enables rapid actuation of service brakes by routing control air pressure efficiently. Designed for systems requiring dual delivery ports, it’s widely used in tractor and trailer setups demanding reliable, fast brake response.
CROSS-REFERENCE(S):
KN28500, KN28500-G, KN28500N, WAKN28500, ZZKN28500X, WBW-KN28500X, BARKN28500X, N30108BC, 1010005, 110197, 1-01-0005, KN28500X, KN28510, KN28510RX, KN28500RX, H28500, H28500X, RKN28500, RKN28500N, RKN28510, RKN28510RX, F224720, LRV-3637, RG2, RG-2, RG-2 RELAY VALVE
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:
✔ Ensure correct orientation; control port must align 90°s to delivery ports
✔ Use provided universal bracket for secure mounting
✔ Mount using two 0.34" diameter bolts on 1.50 inch centers
✔ Confirm control port and delivery routing before pressurizing system
✔ Cover may be rotated during install—does not void warranty or affect performance
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Warranty Information
