Cryogenic service fluid feedthroughs are used to deliver gas and/or coolants, such as Liquid Nitrogen LN2, into high (HV) and ultrahigh (UHV) vacuum systems. Feedthroughs are available with single or dual 1/4 inch tube supply lines. Supply lines are thermally insulated by a 1/2 inch coaxial support tube, which creates a vacuum gap around each supply line. Feedthroughs are terminated with Swagelok standard compression (swaging) fittings, or VCR metal-gasket-fitted, ultrahigh-vacuum-rated fittings.
The Swagelok® fittings products a demountable, gas-tight cold-formed (swaged) mechanical joint between a tube's OD and the ferrules housed inside each fitting. Tube finish, temper, and wall thickness are all critical parameters for making reliable, gas, and vacuum-tight seals.
The VCR fittings are zero-clearance, demountable UHV compatible mechanical joints produced by crushing a deformable metal gasket between two mating and polished fitting gland faces. Fitting gland finish, and metal gasket temper are critical parameters for making reliable, gas, and ultrahigh vacuum seals.
These are general-purpose, non-cryogenic, tube feedthroughs used for gas and/or fluid coolant delivery into high and ultrahigh vacuum systems.
Fluid Feedthrough Material Specifications
CF Flange / Tubes
304 Stainless Steel 316 Stainless Steel
Fluid Feedthrough Vacuum Range Specifications
UHV, Ultrahigh vacuum
HV, High vacuum
1x10-13 Torr 1x10-8 Torr
Fluid Feedthrough Temperature Range Specifications
CF Flange Mount
ISO KF Flange Mount
VCR SS, 316L Gasket
VCR Cu, Copper Gasket
VCR Ni, Nickel Gasket
450ºC 150ºC 450ºC 450ºC 204ºC 315ºC
* Overall assembly ratings must be adjusted to that of the lowest-rated component.