Using AerOpak® Thermocouple and Conductor Cable, Aeropak Thermocouples, Aerpoak RTD's, M.I. Cable, Heaters, TC Wire, Temperature Measurement, Custom Thermocouple Design and Sales - ARi Industries

Helpful Hints for Using AerOpak

Thermocouple and Conductor Cable

HELPFUL HINTS
EXPOSING WIRE - Wire can be exposed by removing the sheath in a lathe. The cable (AerOpak®) is chucked in the headstock with length of approximately 10 times the diameter exposed. Use a small tool, high speed, and light cuts. Wire can also be exposed by using a saw, file, or sheath stripper. A complete cut through the tube should be made about 1/4" from the end. The cut portion is then squeezed until the MgO powder drops out leaving the sheath loose. This process can be repeated until the desired length of wire is exposed. Commercial sheath strippers are available. STORAGE SEALING - Material supplied has been sealed at exposed ends to prevent moisture absorption. When cutting specific lengths, the exposed ends should be coated with a plastic varnish by either dipping, brushing, or other suitable technique. We recommend using Dow Corning Silicone Resin I-2577 for a temporary seal. Welding is recommended if a permanent moisture block is required. Remove moisture from insulation before resealing. ANNEALING - Anneal in reducing or neutral atmosphere to relieve cold work added by forming or bending. Follow standard procedure for annealing stainless steel unless enclosed wires are of a material not compatible with this procedure.	BENDING - Bending can be accomplished with ordinary tube benders. Material can be bent to a minimum radius of 2 times the sheath diameter. It is advisable to make sure that the region of bending is annealed after forming. Repeated flexing at one point will result in work hardening and eventual fracture of the sheath. WELDING - Any form of welding may be performed on the sheath without destroying the insulation. Avoid welding on sheath when adjacent to low temperature materials. Remove moisture before welding. If moisture is not removed and material is subjected to high temperature, rupture of the sheath may occur from the steam generated. HIGH TEMPERATURE SEALING - ARi has developed a patented sealant known as AerOseal® to prevent moisture absorption by the ceramic insulation. This seal is effective over the temperature range of -240 to +420ºC (-400 to +788ºF). It can withstand thermal shock from 420ºC (788ºF) to -185ºC (-300ºF) in 2 seconds. Exposure to temperatures above 420ºC (788ºF) will cause the seal to deteriorate without affecting insulation resistance properties.
PRECAUTIONS
Remove storage seal from ends before processing material; otherwise, varnish can burn to carbon and short out the conductors. We suggest cutting off 1/4" of varnished ends. Do not use solvents to remove seal. Shrink tube seals may be cut off. When welding or brazing, keep all fluxes away from exposed end of AerOpak®. These fluxes will soak into the insulation and cause a low resistance short. Keep exposed AerOpak® ends capped or sealed when not in use to prevent moisture absorption by ceramic insulation.	To remove moisture, bake AerOpak® at 200ºC (392ºF) minimum in an oven until desired minimum insulation resistance is obtained. Seal exposed ends of AerOpak® immediately; exposed ceramic may absorb moisture in a matter of seconds in humid atmospheres. Avoid welding on sheath when adjacent to low temperature materials. Remove moisture before sealing both ends pressure tight. If moisture is not removed and material is subjected to high temperature, rupture of the sheath may occur.

Contact us with any applications you may have.

Main Page| Conductor Cable Main Page

© Copyright 2000-2005 ARi Industries, Inc. All rights reserved.
Email:sales@ariindustries.com