Quartz heaters for aggressive chemicals

Oct. 23, 2003
Purity and cleanliness are manufacturing watchwords in the semiconductor business, right down to the devices used to heat various chemicals and deionized water. In the past, companies have relied on inefficient infrared heaters and Teflon-coated devices that have permeability problems.

They now have another option: thick-film heaters from Watlow, St. Louis, Mo. (www.watlow.com). The devices consist of heating films mounted on the outside of quartz tubes. Chemicals and deionized water flow through the tubes. This configuration is said to provide more efficient heat transfer and rapid response to changes in flow and temperature than other heaters. And because the electric heating elements are outside the tube and the tube is made of inert quartz, the devices can be used with aggressive chemicals such as ammonium hydrochloride, hydrochloric acid, phosphoric acid, and ultrapure 18 megaohm deionized water. The modules are half the size of other heaters with similar capacities, and they eliminate the risk of process contamination in event of heating-element failure. Other features include high-watt density, ultrapure quartz construction, long life, a maximum process temperature of 356°F (180°C), maximum operating pressure of 75 psi, and a maximum flow rate of 35 lpm. Heaters can be supplied as stand-alone modules or built into a tool.

Sponsored Recommendations

NEW Low Profile, Ultra Compact Power Supplies

March 13, 2024
Learn more HERE about Altech's Power supplies!

Altech's Liquid Tight Strain Relifs Catalog

March 13, 2024
With experienced Product Engineers and Customer Service personnel, Altech provides solutions to your most pressing application challenges. All with one thought in mind - to ensure...

Industrial Straight-Through Cable Gland

March 13, 2024
Learn more about Altech's cable glands and all they have to offer for your needs!

All-In-One DC-UPS Power Solutions

March 13, 2024
Introducing the All-In-One DC-UPS, a versatile solution combining multiple functionalities in a single device. Serving as a power supply, battery charger, battery care module,...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!