Product Description
RG-2 RELAY VALVE – KN28520-G
PART NUMBER(S):
Fleet Products: KN28520-G | OE: KN28520, N30108BF | Automann: 170.KN28520
DESCRIPTION:
Model: RG-2 Relay Valve
Vehicles: Universal application for heavy-duty truck and trailer service brake systems
• Valve Type: RG-2 relay valve, pneumatic-actuated
• Function: Fast relay valve used to apply and release service brakes on tractors and trailers
• Supply Ports: 2 x 1/2" NPT (A & B)
• Delivery Ports: 2 x 3/8" NPT (C & D)
• Control Port: 1/4" NPT
• Cracking Pressure: 5.6 ± 1.0 PSI
• Control Port Position: 90 degrees relative to delivery ports
• Mounting: 2 holes, 0.34" diameter on 1.50" centers
• Plugs Included: 1 x 3/8" NPT plug
• Cover: Rotatable without affecting warranty or performance
• Weight: Approx. 1.5 lb
• Material: OEM-grade, corrosion-resistant metal construction
• System Fitment: Designed for use in standard tractor/trailer brake systems with fast actuation needs
• Unique Features:
– Compact design for easy installation
– Rotatable cover for flexible port orientation
– Cracking pressure engineered for responsive service brake application
• Mounting Configuration: Vertical or horizontal as required by system layout
Applications:
The KN28520-G is a compact RG-2 style relay valve engineered for fast and efficient service brake actuation in air brake systems on tractors and trailers. It is commonly used as a direct replacement for KN28520 and its equivalents across OE and aftermarket systems. Designed for reliable performance under heavy-duty conditions in commercial vehicle fleets.
CROSS-REFERENCE(S):
KN28520, WAKN28520, RKN28520, E-MDKN28520X, N30108BF, KN28520-G, KN28520RX, HKN28520X, ZZKN28520X, KN28520X, KN28520N, KN28520P, KN28520B, KN28520C, KN28520D, KN28520E, KN28520F, KN28520G, KN28520H, 170.KN28520, 5396-KN28520, 5396KN28520, 5396KN28520X, 28520, 28520NP, 28520P, 28520X, 28520XB, 286845, 294867, 30069, 34027, 3505412, 35058, 36121, 3935414, 401203, 4194307082, 4827004, 4828520P, 4C112, 501522R1, 5018473, 51443, 641089, 65310, 65310X, 701504, 72201-0014, 72201-0036, MIN30109AK, MKN28520, MSKN28520X, MSMDKN28520X, MTAKN28520, N30109AK, N30109BL, OTR28520, PAEM36121, PL-28520, PL28520, POW28520P, PP28520P, PPPOW28520P, PRA78890, PRKN28520X, PVKN28520X, R955KN28520, R955KN28520N, RB28520, RV061, S-6007A, S-6087, S6007A, S6087, SAA78890, SAP-KN28520, SAPKN28520, SARG2, SEA110198, SEA110411, SL-9126, SL9126, SV401203, T294867, T294867C, TDARKN28520, TECTV28520, TV28520, TV28520TEC, TWDHKN28520, VEL034058, VN30109AC, VN30109BL, W28520P, WA103010, WABWKN28520, WE78890, XZKN28520X, ZZKN28520
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:
✔ Install with correct port orientation—note control port's 90° position relative to delivery ports
✔ Use standard NPT practices for sealing and tightening ports
✔ Ensure control line and delivery ports are free of obstructions before installation
✔ Cover may be rotated to match installation angle without voiding warranty
✔ Compact size allows installation in space-constrained areas of brake system
✔ For proper function, verify system pressure is within spec (up to 130 PSI)
SOLD AS NEW
Brand new and ready to install, with OEM Grade Reliability
SUPPORT & ORDERING
For technical support, installation guidance, or to confirm fitment, Call: 1-877-243-0442 | Email: sales@fleet-products.com
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