Stainless steel class 300 extended stem device from Acme Cryogenics is offered in sizes from 0.50 to 2" and is available in vacuum and nonjacketed versions. The valve can be configured with a bellows seal for liquid hydrogen and helium. The manual version can be adapted to an actuated design with the addition of an actuator kit. The valve has O-ring seals, proprietary bellows design, external stem threads and metal-to-metal secondary seats.
May/June 2000, RS# 282