KLINGER MAXIFLEX SPIRAL WOUND GASKETS

The Design Principle

Maxiflex 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. The metal strip holds the filler giving the gasket mechanical resistance and resilience.

KLINGER Maxiflex Spiral Wound Gasketsare manufactured to specifications of ASME B16.20. They are available in a range of configurations and materials. They are suitable to use for flange standards to: ASME B16.5, DIN, BS 10, JIS, AS2129 and customer designs.

Below arethe most common gaskettypes:

Spiral Wound Gasket Type R – Spiral Wound Gasket Type CR – Spiral Wound Gasket Type RIR

Spiral Wound Gasket Type R
– Wide choice of materials for filler and metallic strip
– Suitable for high pressure and high temperature applications
– Recommended flanges: tongue and groove, male to female and flat face to recess in vessels, valves and pumps
– General and critical duties

Spiral Wound Gasket Type CR
– Solid metal outer ring used as a centering device and compression stop
– Used mainly on raised face and flat face flanges
– Wide choice of material for filler and metallic strip
– General duties

Spiral Wound Gasket Type RIR

– Solid metal inner ring
– High pressure and high temperature capability
– Male to female flanges in vessels, valves and pumps
– Wide choice of materials for filler and metallic strip
– General and critical duties

Spiral Wound Gasket Type CRIR – Spiral Wound Gasket Type CRIR PTFE Inner Ring – Spiral Wound Gasket Type CRIR KLINGERgraphite Inner Ring

Spiral Wound Gasket Type CRIR
– Solid metal inner and outer rings
– Suitable for high pressure and high temperature applications
– Standard spiral wound gasket for raised face or flat flanges
– Prevents turbulence and erosion damageto flange
– Prevents damageto the gasket bore and inner windings
– Inner ring acts as a heat shield and a corrosion barrier
– Wide choice of material for filler and metallic strip
– General and critical duties

Type HTX – Type R Graflex Faced

Spiral Wound Gasket Type HTX for heat exchangers
– A combination of inner and outer rings
– The inner ring could have pass bars or carry either a metal clad or soft gasket with pass bars
– Manufactured to customer designs
– Wide choice of materials for filler and metallic strip
– Manufactured with thin outer windings to create stable, large diameter gaskets for narrow heat exchanger application
– For heat exchanger applications

Spiral Wound Gasket Type HTX for heat exchangers
– Covered with 0.5mm Graflex
– Used on manhole covers
– Low bolt load applications
– Uneven sealing faces
– Double integrity seal

Thickness of Maxiflex Gaskets:

Spiral Wound Gaskets are manufactured with a number of standard thickness which are designed to a specific thickness to attain the best sealing performance and adaptation to the flanges. The thickness is measured to the metallic windings not to the filler. The standard thickness values are as follows:

Initial Thickness	Recommended Compressed Thickness
3.2 mm	2.3 – 2.5 mm
4.5 mm	3.2 – 3.4 mm
6.4 mm	4.6 – 4.8 mm
7.2 mm	4.8 – 5.0 mm

Standard Winding and Ring Materials: Maxiflex Gaskets are available to order in a wide range of winding and ring materials to suit specific applications

Maximum Temperature Limits:

The table below show some examples of using various winding and filler materials for various temperature limits. Please consult Klinger for specific applications.

Winding Material	Maximum Temperature	Winding Material	Maximum Temperature	Filler Material	Maximum Temperature
304/304L	650ºC	Inconel	1000ºC	Graphite	500ºC
316/316L	800ºC	Incoloy	600ºC	PTFE	260ºC
Duplex 31803	800ºC	Hastelloy	700ºC	Mica	1000ºC
347SS	870ºC	Super Duplex	600ºC	Mica/Graphite	900ºC
321SS	870ºC	Alloy 20	600ºC
Monel 400	800ºC	254 SMO	600ºC
Nickel 200	600ºC	Zirconium	500ºC
Titanium	500ºC	Carbon Steel	500ºC

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