Spiral wound gaskets are ideal for steam, oil, liquids, gases, acids, alkalis, various organic medium- sand solvents etc. This engineered product is tailor made to be compatible with the range closure in which it is to be used. They are more resilient than any other type of metallic Gasket with the exception of pressure sealing metal Gaskets and, as a consequence, can compensate for range movement that may occur due to temperature gradients, variations of pressure and vibration.

GASKET STANDARD STYLES

• Gaskets without guide and inner ring
• Gaskets with inner ring
• Gaskets with guide (outer) ring
• Gaskets with guide and with inner ring

Filler

• Filler is normally used for thicknesses from 0.5 mm to 0.6 mm.
• Flexible graphite 98%
• Flexible graphite 99.85%
• Non Asbestos, Asbestos PTFE, E-PTFE, Ceramic, Mica

PROPERTIES AND APPLICATION

Spiral wound gaskets are special semi-metallic gaskets of great resilience; therefore they are very suitable for applications featuring heavy operating conditions. Spiral wound gaskets are manufactured by spirally winding a V-shaped metal strip and a strip of non-metallic filler material. The metal strip holds the filler, providing the gasket with mechanical resistance and resilience. Spiral wound gaskets can be reinforced by an outer centring ring and/or inner retaining ring. The outer centring ring controls the compression and holds the gasket centrally within the bolt circle. The inner retaining ring increases the axial rigidity and resilience of the gasket. Spiral wound gaskets should always be in contact with the range and should not protrude into the pipe or project from the range. They can be used over the complete temperature range from cryogenic to approximately 2000° degrees Fahrenheit. The gaskets are manufactured according to the API 601 and ASME 16.20 standards which can be used in all pressures from vacuum to the standard 2500 PSI range ratings.

Advantages

• Sealing under heavy operating conditions
• Stress compatibility
• Solid Stable and sealable
• Easy to install

SHAPE AND CONSTRUCTION

Spiral wound gaskets are produced in several styles and combination of materials to 􀃶t the most stringent application. Spiral wound gaskets are usually of circular shape. However we can produce them in other shapes such as: oval, rectangular, with round corners etc. Our standard production program comprises a range of spiral wound gaskets with inner diameters of 10 mm to 3000 mm and a nominal thickness of 3.2 mm, 4.5 mm and 6.5 mm. Spiral wound gaskets of non-standard dimensions and shapes, and larger diameters are available on request.

NON-STANDARD SWG

Gaskets for Boilers Hand holes and Manholes: Gaskets can be manufactured in other shapes like oval and oblong (stadium). There is no specific standard for this type of gasket.When ordering it providing complete specifications is required: inside dimensions (AxB), width (b) and thickness (s) or a drawing.

ASME/ANSIB16.5	MSS SP44 (ASME B16.47 SERIES A) (AWWA)
BS 1560, BS10, BS4504	DIN FLANGES, JIS FLANGES
API 605 (ASME B16.47 SERIES B)	FRENCH NF STANDARD

Spiral Wound Metallic Gasket 'W' type and Spiral Wound Metallic Gasket 'Inverted W' type are also available.