SPIRAL WOUND GASKET (SWG)

Spiral Wound Gasket (SWG)

Characteristic

A spiral-type gasket is an ideal type among other semi-metal gaskets. The V-shaped metal plate and non-metal fillers are overlapped, and they are wrapped into the spiral pattern and the two ridges are soldered together. As it is consisted of flexible metal and smooth filler, it has the following excellent gasket functions:
- To be used for high pressure and high temperature
- Automatically adjusts to the changes of the pressure, temperature and vibration.
- It has excellent sealing capability compared to the size.
- It has an excellent sealing capability on the irregular flange surface.
- Any shape of size is available with reasonable price.
- Hoop and filler materials can be selected according to the special operation conditions.

Standard Type Of Spiral Wound Gasket

* BASIC TYPE ( R )

Suitable for tongue and groove, male And female or grooved to flat face flange assemblies.

* OUTER RING TYPE ( CG )

It is very easy to install the gasket to flange face because the end of outer ring will touch at bolts. Suitable use with flat face and raised face flanges.

* INNER RING TYPE ( RIR )

Suitable for male and female pipe flange

* INNER & OUTER RING TYPE ( CGI )

A inner ring and outer ring type gasket will give an additional compression limiting stopper for gasket inner and outer side.

Standard :

ASME B16.20, ASME B16.47-A, ASME B16.47-B

DIN (DNPN), JIS B2404 (JIS)

Material : Carbon Steel / Stainless Steel F304/304L, F316/316L

Pressure & Ratings Ansi : 150LBS, 300, 600, 900, 1500, 2500

Pressure & Ratings JIS : 5KG, 10KG, 16KG, 20KG, 30KG, 40KG

Pressure & Ratings DIN : PN10, PN16, PN25, PN40,

DIN/UNI Size : 1/2" - 60"

Structural material

Filler	Steel band	Inner ring	Outer ring
Asbestos wrapping	SUS 304	Carbon steel	Carbon steel
Graphite wrapping	SUS 316	SUS 304	SUS 304
PTFE wrapping	SUS 316L	SUS 316	SUS 316

Filler	Temperature(⁰C)	Max operating pressure(kg/cm2)
Asbestos wrapping	-200~550	250
Graphite wrapping	-150~450	100
Graphite wrapping	240~260	100

The table below may be used for selected material of inner ring and winding metal.

Trade Name	AISI	Hardness(HB/HV)	°C
304 Stainless steel	304	130-180	-220~+550
316 Stainless steel	316	130-180	-220~+550
316L Stainless steel	316L	130-190	-100~+550

The outer ring is generally manufactured from carbon steel with an anti-corronsion treatment. The table below may be used for determining the correct filler.