Breaks

Breaks are electrical isolators which are composed of tubular metal adapters brazed to both ends of a ceramic insulator. These assemblies are used primarily for voltage isolation. Assemblies with inner diameters less than 2.5 inches are typically referred to as breaks, and those with larger inner diameters are called envelopes.

MPF offers several mounting options for breaks and envelopes: Weldable, Quick Flange (QF), and Conflat Flange (CF). Custom adapters, plates and flange configurations are available by request.

Cryogenic Breaks

Electrical breaks are often required in transmission lines for cryogenic fluid. Several standard designs are offered which are safe to operate to -200ºC. These cryogenic breaks are intended to be TIG welded into cryogenic fluid transmission lines, and typical adapter designs are available with 1/8” to 3/8” diameters.

Liquid Breaks

Coolant fluid lines often require an electrical break. Installation of liquid breaks into a transmission line for coolant fluid requires soldering or low temperature brazing (below 700ºC). Standard adapters fit 1/4” to 1/2” diameter tubes.

Vacuum Breaks & Envelopes

Various transitions in vacuum systems require voltage isolation. Breaks and Envelopes are all suitable for ultra high vacuum environments. Both are constructed using a high purity alumina insulator sealed into stainless or kovar sleeve adapters. Vacuum Breaks are available with nominal tube diameters up to 3 inches, and voltage ratings up to 40,000 Volts DC. Standard designs include Weldable, Conflat Flange and Quick Flange adapters. Vacuum Envelopes are available with nominal tube diameters up to 8 inches, and voltage ratings up to 15,000 Volts DC. Weldable and Conflat Flange adapters are standard.