Spiral Wound Gasket Descriptions

STYLE: ASP-CG Spiral Winding with Outer Guide

Description Detail: The ASP-CG is the most common profile of spiral wound gasket and used extensively in ANSI B16.5 flanges. The gaskets consist of a metal guide ring (or sometimes referred to as a centering ring) and a spiral wound sealing element. This profile is normally used in raised and flat faced flanged. The outer ring is often made of carbon steel (painted or zinc plated to prevent corrosion) but can be made of alloys for higher temperature and more severe medium applications.

STYLE: ASP-R Spiral Winding Only

Description Detail: This style of gasket consists of the winding/sealing element only. It has no guide ring (centering ring) or inner ring. It is most commonly used in tongue and groove and male/female flanges.

STYLE: ASP-IR Spiral Winding with Inner Ring

Description Detail: This gasket is similar to the ASP-R, however, it has an inner ring. Its application is similar to the ASP-R.

STYLE: ASP-CGI Spiral Winding with Outer Guide and Inner Ring

Description Detail: This gasket is identical to the ASP-CG, however an inner ring has been inserted to enhance gasket performance. The inner ring is added to prevent the possibility of the gasket imploding into the pipe during installation, to protect the sealing element from extreme temperatures and mediums, fill the void between flanges to prevent erosion of the flange, and to reduce the possibility of failure. The inner ring is normally made of the same alloy as the winding. The DIN 2699 standard German) specifies inner rings in all spiral wound gaskets. Inner rings are required for gasket with PTFE filler according to ASME B16.20 standards, and considered important for graphite fillers. This profile is normally used in raised and flat faced flanges.

STYLE: GSI-HF Kamm-Sprial

Description Detail: Designed so seal Hydrofluoric Acid (HF) and other critical chemical applications. The gasket contains both spiral-wound and Kamm profile technologies. It occupies all the space from the bore of the pipe to the outer diameter of raised face flanges.