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

March 31, 2025
Unlike passive products - made of simple carbon springs - the bionic prostheses developed by Revival Bionics are propulsive, equipped with a motor and an artificial Achilles tendon...
March 31, 2025
Electric drives are a key technology for the performance of machines, robots, and power tools. Download this guide for an introduction to high-quality mechatronic drive systems...
March 31, 2025
Discover the world of maxon drive technology: motors, gearheads, sensors, controllers, and accessories. Configure your drive system online, including all relevant product and ...
March 31, 2025
Share current page XSun designs and manufactures a drone that is both energy-independent and can make its own decisions, for fully-automated missions. The company needed reliable...

Voice your opinion!

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