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WATER · WASTEWATER · PUMPING STATIONS · HIGH PRESSURE

Spiral Wound Gaskets

GATRIX® Type CGI – stainless steel winding with PTFE filler, an inner ring and a centering outer ring. Built for raised-face flanges beyond the pressure limit of rubber gaskets.

Gatrix Spiral Wound CGI

High pressure

Rated ASME Class 150 to 2500 and PN10 to PN100, well above the 40 bar limit of rubber-steel gaskets.

Inner ring protection

Prevents the winding from buckling inward, and shields it from flow erosion and solids in the bore.

Compression stop

The outer ring centres the gasket on the bolts and prevents over-compression.

No galvanic attack

The non-conductive PTFE filler does not pit carbon steel flange faces in wet service, as graphite can.

CONSTRUCTION

Spiral Wound Gasket CGI

A metal winding sealed between two rings

  • Winding: SS316L V-profile strip (other alloys on request)

  • Filler: PTFE (flexible graphite or mica on request)

  • Inner ring: SS316L or carbon steel

  • Outer ring: carbon steel, zinc-plated or epoxy-coated

  • Marking: ASME B16.20 colour code and stamping.

MATERIALS

Pick the filler for the medium

Elastomer

Temperature range

Suitable for

Not suitable for

PTFE

up to +260 °C

Water, wastewater, chemicals, wet carbon steel flanges

Fire-safe duty, temperatures above 260 °C

Flexible graphite

up to +550 °C

Steam, hydrocarbons, high temperature, fire-safe duty

Wet carbon steel service, strong oxidisers

Mica

up to +1000 °C

Exhaust gas and very high temperature

Tight-sealing liquid service

Temperatures are filler limits. The actual limit is the lower of the filler and winding-metal ratings.

SPECIFICATIONS

Technical data

Custom sizes and materials made to drawing.

Nominal sizes

NPS ½" to 60" / DN 15 to 1500

Flange drillings

ASME B16.5, ASME B16.47, EN 1092-1 - RF Only

Pressure rating

ASME Class 150 – 2500 / PN10 – PN100

Max. temperature

+260 °C with PTFE filler

Thickness

Winding 4.45 mm; rings 2.97 – 3.33 mm (ASME B16.20)

Standards

ASME B16.20, EN 1514-2

Drinking water approval

FDA Certificate

SELECTION

Rubber-steel or spiral wound?

  • Up to 40 bar, Class 150 / PN40: GATRIX® Type RSG

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  • Above 40 bar, Class 300 and higher, or higher temperatures: GATRIX® Type CGI

Downloads

PDF . CATALOG​
Spiral Wound Gasket Datasheet

PDF . GUIDE​
CGI Installation Guide

PDF . TABLE​
Gasket Torque Table

Need gaskets for a project?

Send size, drilling, medium and quantity. We reply within 48 business hours.

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