The Midland Haldex KN28602 is an FF2 Full Function Trailer Valve, also known by OEM part number N4304AE, designed to consolidate trailer brake control into a single-valve system. It operates at a 5.0 PSI crack pressure and features a 3/4" reservoir port, 3/8" supply port, 1/4" control port, two 3/8" spring brake ports, and four 3/8" delivery ports. Built-in pressure protection and anti-compounding functions keep the system FMVSS-121 compliant, preventing spring brake compounding that can crack foundation components. Service brake priority holds sufficient tank pressure when spring brakes release. Compatible with single or twin air tank configurations. Call us to confirm proper fit for your trailer application.
Interchanges:
- 110742
- 110744
- KN28602M1D
- N4304AE
- N4304AF
- N4304B
- N4304DD
- R955KN28602X
A factory handling fee of $25.00 per order is added at checkout.
Features
FF2 Full Function Trailer Valve - single valve replaces multiple components for simpler installation and troubleshooting
5.0 PSI crack pressure; ports: 3/4" reservoir, 3/8" supply, 1/4" control, two 3/8" spring brake, four 3/8" delivery
FMVSS-121 compliant built-in pressure protection and anti-compounding eliminates spring brake compounding damage
Built-in service and spring brake quick release valves integrated into one unit
Engineering-grade composite construction resists corrosion without the weight penalty of aluminum
Heavy-wall mounting nipple treated for corrosion resistance and severe-duty use; compatible with single or twin air tanks
Tech Specs
- Crack Pressure 5.0 PSI
- Reservoir Port 3/4"
- Control Port 1/4"
- Supply Port 3/8"
- Spring Brake Ports 2 @ 3/8"
- Delivery Ports (4) 3/8"
- OEM Part Number N4304AE
