Products - Sealing Gaskets

Keywords: Spiral Wound Gasket

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Spiral wound gasket (SWG) consists of thin metal hoop and nonmetal filler material which are simultaneously wound.

The metal hoop is pre-formed in V or W shaped profile, which allows the gasket to act as a spring between the flanges. It is extremely popular due to the wide variety of available styles and sizes. Depend on its excellent compression resilience; it is suitable for sealing spots where the alteration of temperature and pressure are frequent. It can be used as the static sealing element of pipe, valve, pump, thermal exchange, condensing tower, plain hole and man hole of flange, etc.
 
During the rolling-up of a profile metal tape, a filler is being included. It is PTFE or expanded graphit. The v-profile metal tape is produced
by different metal materials or steels. The flexibility of the gasket in pressing on direction is being upgraded due to the v-shape cross-section.
 
Application:                                                  

Products

Style

Flange

For example

Basic type SWG

G1101a

Tongue and Groove

304/PTFE

SWG with inner ring

G1101b

Male and Female

304 304/FG

SWG with outer ring

G1101c

Raised face

Flat face

304/ASB CS

SWG with inner

& outer rings

G1101 Id

 

304 304/FG CS

SWG for heat exchanger

G1101c

Heat exchanger

304/FG with 1 bar of DJ

Special shape SWG

G1101 e

Special

Oval

Material application:

Filler material 

Temperature

Pressure

 

Graphite                              

-240°C~+550°C in oxidizing media 

300bar in hot water, oil, etc

 

-240°C~800°Cinnon-oxidizing media

200bar in vapor oil, gases, etc

Asbestos

-150°C~+450°C

150bar

PTFE

-200°C~+250°C

150bar

 Spiral Wound Gaskets Coloring Guardline:

  

Produced according to ASME, BS, JIS and DIN standards, etc. Special sizes and shapes are also available upon request.

  www.nbseals.com/products/Sealing-Gaskets/Spiral-Wound-Gasket.html