DESCRIPTION

Spiral wound gaskets have the ability to recover under the action of fluctuating loads caused by process fluid pressure and temperature changes, flange face temperature variations, flange rotation, bolt stress relaxation and creep.
The gasket sealing element consists of a pre-formed metallic winding strip with layers of a softer, more compressible sealing material which, during compression, is densified and flows to fill imperfections in the flange surfaces when the gasket is seated. The metal strip holds the filler giving the gasket mechanical resistance and resilience.
The outer ring of the spiral prevents blow outs and simplifies fitting the gasket. The inner ring acts as an additional heat shield when subjected to high temperatures. Spiral wound gaskets are also easy to fit as well as remove and will not damage a flange face.

STOCK

In stock with the construction of:
Carbon outer/ 316 stainless inner/ Graphite filled
Sizes ½” to 24”
ALL PRESSURES AND TEMPERATURES ARE SUBJECT TO INDIVIDUAL APPLICATION

CONSTRUCTIONS OF SPIRAL WOUNDS

FILLER MATERIAL
MAX. TEMPERATURE
ASME B16.20 COLOUR
CODING
Graphite 500°C Grey Stripe
PTFE 260°C White Stripe
Nonas 350°C Pink Stripe
Mica 1000°C Light Green
Mica & Graphite, Zonal 900°C N/A
WINDING MATERIAL
MAX. TEMPERATURE
ASME B16.20 COLOUR CODING
304 Stainless Steel 650°C Yellow
316L Stainless Steel 800°C Green
Duplex 800°C N/A
347 Stainless Steel 870°C Blue
321 Stainless Steel 870°C Turquoise
Monel 400 800°C Orange
Nickel 200 600°C Red
Titanium 540°C Purple
Hastelloy B – 2 1000°C Brown
Hastelloy C – 276 1000°C Beige
Inconel 600 1000°C Gold
Inconel 625 1000°C Gold
Inconel X – 750 1000°C Light Grey
Incoloy 825 1000°C White
Zirconium 702 500°C N/A

GREEN = OUTER RING

BLACK = WINDING

GREY = INNER RING

TYPE CRIR

  • Solid metal inner & outer ring
  • Suitable for high pressure and temperature applications
  • Raised face or flat flanges
  • Prevents turbulence and erosion damage to flange
  • Prevents damage to the gasket bore and inner windings
  • Acts as a heat shield
  • Acts as a corrosion barrier
  • General and critical duties
 OTHER CONSTRUCTION TYPES ARE AVAILABLE ON REQUEST