Medium/Heavy-Duty Trucks

Air Brake Valve Diaphragm Life Improvement

The SituationAir Brake 2
Heavy truck air brake systems utilize pneumatic valves to control the airflow that actuates the tractor and trailer brakes.  One such valve, a Quick Release Valve, closes the air system when the trailer is disconnected from the tractor to maintain pressure in the tractor. The valve contains a rubber diaphragm that is expected to actuate 750,000 to 1,000,000 times over its life. One customer was not reliably reaching that life with a fabric reinforced gasket.

The Solution
Trostel developed an HNBR diaphragm with superior abrasion and flex fatigue resistance. This pure rubber part outlasts the fabric reinforced material and provides consistently better performance.