VALVE RELAY

OEM / Manufacturer Navistar International (part number ZZKN28041)
Function Used for applying and releasing rear axle(s) service or parking brakes on long wheelbase vehicles; offers graduated control.
Supply Ports (2) 1/2″ NPT
Delivery Ports (4) 1/2″ NPT (for the 4-port anti-compounding version)
Control Ports (2) 1/4″ NPT
Crack Pressure 4.6 PSI (opening pressure)
Max Operating Pressure 145.04 PSI (for WABCO RKN28041 equivalent)
Mounting Typically 4x M8; bracket not included.
Approximate Weight 3.00 lbs