Friday, September 8, 2000
When researchers at Massachusetts General Hospital wanted to
monitor the breathing of rats in an MRI machine, they needed a non-metallic
valve for the rats' respirator. Metallic valves won't work in the imager's
Instead, the researchers used Series P inert valves made by
Takasago Electric (Nagoya, Japan) and distributed in the US by the Clark
Company. "The nonmetallic valves met Mass General's low magnetic requirements,"
says Clark's Chuck Hixon. "And unlike other valves, Series P has a large,
flat-to-flat sealing area that seals better and longer than ball-and-funnel
These valves are tested to 10,000 cycles and can withstand
particulate in fluids. "Unlike other valves with Teflon seals that sometimes
deform and deteriorate, these valves have flat elastomer seals that maintain
their form and endure wear," says Hixon.
In addition to medical applications, the valves are also used in
semiconductor and general analysis applications where corrosive and hazardous
materials are present. The valves require 3-6 bar of pneumatic pressure for
actuation in models using diaphragm of bellows actuators. They are available in
2- and 3-way configurations with orifice sizes from 1.6mm to 25 mm.
For more information, contact Hixon at (800) 253-2497 or go to the
company's web site at http://www.clarksol.com.