Nor-Cal’s product line of liquid and liquid nitrogen feedthroughs includes the most commonly required for medium, high and ultrahigh vacuum applications. Tubing is .25 and .375 (6.35 and 9.53mm) inch OD, 304 stainless steel with CF or NW flanges. They are available without fittings or terminated with industry standard Swagelok or Cajon VCR fittings. Maximum bakeout with CF flanges is 450ºC and 200ºC with NWs. Vacuum ranges are 10-10 mbar and 10-8, respectively.
Liquid feedthroughs are a cost-effective and reliable way to introduce water into a vacuum system. The .035 inch (.89mm) single wall tube construction is designed for the transport of water as a cooling agent.
Liquid nitrogen feedthroughs are constructed with single and dual coaxial tube geometries. This thermal barrier effectively reduces condensation and ice buildup on the atmosphere side of the feedthrough around the mounting flange interface, protecting the seal’s integrity. This is necessary because of the extreme thermal gradients encountered with liquid nitrogen.
Swagelok stainless steel tube compression fittings provide a leakproof, torque-free vacuum seal by swaging the stainless steel tube to which they are mated. These fittings require no gaskets.
Cajon VCR stainless steel compression fittings provide a quick and efficient means of vacuum system assembly. These zero clearance fittings make them the perfect installation solution when space is limited. Compression of a removable copper gasket creates a vacuum seal between the air and process sides.
Nor-Cal’s extensive line of electrical feedthroughs are manufactured from ultra-high vacuum grade materials such as high alumina ceramic insulators, OFHC copper or nickel conductors, and 304 stainless steel flanges. These robust ceramic to metal feedthroughs have electrical ratings for operation with one side in dry atmosphere while the opposite end is in a stable vacuum. They are used in UHV systems with CF flanges or high vacuum systems with NW flanges. CF feedthroughs can be baked to 450°C and NWs to 200°C. Our product line consists of the most commonly required feedthroughs for general vacuum applications. Customs designs or modified standards can readily be supplied.
High Voltage Insulators
Vacuum insulators electrically isolate one component or system from another. Nor-Cal’s ceramic insulators provide UHV compatible isolation. Our insulators are available in 3/4 and 11/2 inch (19.05 and 38.1mm) tube diameters, 3KV to 15KV ratings, with either CF or NW flanges.