The Adjustable Proportional valve is used to adjust the lift axle’s suspension pressure based on a pilot signal from a fixed axle suspension. This valve is used exclusively on air ride suspension trucks and trailers.
This valve is required for most air ride trucks and trailers attempting to meet SPIF’s lift axle equalization requirements.
- (3) 1/4” NPT ports
- Outlet pressure to input pressure ratio is adjustable from 1.3:1 to 0.8:1 (30% higher to 20% lower, assuming the supply pressure is high enough to sustain the output)
- Max operating pressure: 150 psi