Insulating Sleeves

Material Dielectric Strength volts/mil WaterAbsorption % Max ContinuousOperating Temp.
Integral 450 0.90 180ºF / 82ºC
Mylar® 4,000 0.80 300ºF / 149ºC
Nomex®* 720 --- 600ºF / 315ºC
Phenolic** 140 2.00 225ºF / 107ºC
Polyethylene*** 400-500 0.01 150°F / 66°C


All insulating sleeves are 1/32" (.794mm + .000 - .010") thick.

Note

* Available on special request for high temperature applications.

**Made of NEMA (National Electrical Manufacturers Association) grade laminated phenolic.

***Low moisture permeability and absorption rate make sleeves excellent for wet application. Flexible and tough.

® Dupont trademark

Insulating Washers

Material Dielectric Strength volts/mil Compressive Strength (Flatwise) psi Flexural Strength (Flatwise with grain) psi Max. Continuous Operating Temp.
Non-Asbestos 400 --- 3,000 700ºF / 371ºC
Phenolic 200 39,000 22,000 225ºF / 107ºC


Flat insulating washers, placed on the studs between the flange and flat steel washers, manufactured from the customer's choice of either: 1/8" (3.175mm) thick fabric-reinforced, laminated phenolic or non asbestos. These washers may be used with polyethylene or phenolic sleeves. Note: If not specified, washers will be plain faced phenolic.

Steel Back-Up Washers

Steel washers fit between the nut and the insulating washer to prevent damage to the insulating washer. The outside diameter is sized to fit within the bolt facing on ASA standard flanges. Steel washers are 1/8" (3.175mm) thick for extra strength. Insulating washers are not necessary on both sides of the flange, but it is a good practice. For high temperature applications of these products, consult a representative or your distributor for recommendations.