Announcement: Eurotherm® Joins Watlow® - Read Press Release

Silicone Rubber Heater Puts Brakes On Truck Air Brake Moisture Problems


Air brakes on trucks need protection in winter against moisture freezing that can cause brake failure.


Air dryers with a Watlow silicone rubber heater that prevents venting valve freeze-up in temperatures as low as -70°F (-55°C).

Watlow engineering worked with this manufacturer to improve his product quality and keep costs at a minimum. The customer sends a casting to the Watlow plant where the heater is vulcanized to the casting in a specially adapted hydraulic press. This is the most efficient method of heat transfer because there is a minimum amount of insulation (mastic or glue) between the heater and the part. Some heaters are 12 volts, others 24 volts, so Watlow color-codes the leads to decrease the likelihood of an improper installation.