Dirt guard in the coupling head

Small cause, large effect: the pneumatic palm couplings of an uncoupled trailer are usually left open even though they can be capped. This allows dust, insects and other pollutants to enter the coupling and hinder the pneumatic functioning. The solution to the problem is Protect-O.

A sophisticated rubber diaphragm that closes automatically when the connection with the tractor is terminated. The diaphragm protects the pneumatic system from contamination and reopens upon contact with compressed air.