4 Barten Lane
Woburn, MA 01801
Tel 1-781-933-3570

Since 1958

SEMIFLEX® is available in both sealed and dynamic vacuum. The sealed vacuum pipe is constructed of stainless steel and the dynamic vacuum pipe is constructed by either OHFC copper or stainless steel. Dynamic SEMIFLEX® is continuously evacuated by a pump to provide a dynamic vacuum. Both sealed and dynamic systems consist of SEMIFLEX® pipe with the addition of elbows, crosses, tees and end fittings for connection to the source of supply and the points of outlet. These systems can be simple point-to-point hook up, or for a multi-branch network supplying and entire plant from a single storage tank.

SEMIFLEX Pipe
Semiflex® pipe

Triax pipe is similar to SEMIFLEX® pipe, but consists of three concentric tubes. Vacuum is maintained in the outer annular space. Triax systems consist of SEMIFLEX® line and fittings from the supply source to a Liquid/Vapor Phase Separator. The separator continuously removes any gas generated by heat loss and pressure drop, venting it to the outside and maintaining internal pressures in the system at approximately one atmosphere. Liquid is supplied to the use points via Triax pipe from the separator. Gaseous nitrogen returns continuously to the separator in the annular space between the inside and middle tubing. Triax systems are used where the rapid discharge of liquid nitrogen caused by high tank pressures is undesirable.

MICROtorr 11 Dynamic vacuum pump evacuates and holds the insulation vacuum for SEMIFLEX® systems at levels of 1x10-6 torr or better, a range in which liquid nitrogen can be piped with minimum loss and least cost. It is a clean, quiet and vibration free pump station and an air-cooled oil diffusion pump with cooling fan designed for reliable and continuous 24 hours a day operation. Maintenance is extremely simple, requiring only routine oil level checks. The pump station includes an integral valve which closes in the event of power interruption and keeps your SEMIFLEX® system operable.
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