Isolating Sleeves & Washers, by GPT

GPT Isolating Sleeves

Isolating sleeves are available in the following materials:

• Mylar
• Polyethylene
• Phenolic
• Nomex^®
• G-7 Silicon Glass
• G-10 Epoxy Glass
• G-11 Epoxy Glass

Designed to easily fit over standard size flange bolts and studs within standard size bolt holes, GPT isolating sleeves have a wall thickness of 1/32" (0.79 mm) and are used with separate isolating and steel washers. They are available for standard American bolt sizes from 1/2" (12.7 mm) to 3-1/2" (88.9 mm) as well as metric bolt sizes from 12 mm and larger.

GPT Isolating Washers

Isolating washers have a standard thickness of 18" and are available in the following materials:

• High Strength Glass Clad Phenolic
• G-3 High Temp. Phenolic
• G-7 Silicon Glass
• G-10 Epoxy Glass
• G-11 Epoxy Glass

Designed to provide tough, positive isolation. GPT isolating washers are available for bolt sizes from 1/2" (12.7 mm) through 3-1/2" (88.9 mm) and are made to fit over the isolating sleeves.

GPT One-piece Sleeves & Washers

Molded from acetal resin and available for bolt diameters from 1/2" to 1-1/2" (12.7 to 38.1 mm), one-piece sleeves and washers are structurally tough but limited to applications where the flange temperature does not exceed +180°F (+80°C) and compressive loads do not exceed 18,000 psi. They are generally used as single washer sets because they're molded to specific lengths and, in many instances, are longer than the thickness of a single flange. A washer centering ring positions the steel washer on the unit properly to avoid uneven pressures on the washers. G-10 one-piece sleeve / washer assemblies are available for additional strength and convenience.

PSI Steel Washers

Steel washers are designed to fit over the isolating sleeve or the retainer ring on the one-piece sleeves and washers. The outside diameter is sized to fit within the bolt facing on ANSI standard flanges. They are made of 1/8" (3.2mm) thick plated hot-rolled steel.