Raise & Lower Valves

Raise & Lower Valves

Raise and Lower valves are used in air suspension systems to adjust the chassis height during loading operation. Versions with RtR (Reset to Ride Height) can reset the suspension to normal operation height by speed related signal from ABS or EBS systems (usually at 15 kph).

COLAS+ is the 2nd generation of the well known COLAS product range.

COLAS Series COLAS+ Series


  • reset to ride height
  • dead man function
  • releasable push to connect fittings
  • black plastic handle

New version includes the same features but offers additional:

  • a lock position in raise and / or lower position (called "RoRo" feature)
  • a test point for suspension pressure
  • blue instead of black handle