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Spiral Wound Gasket

Product Item : OVG-04
Category： Gasket
Supply: Custom
Type: Style R, Style RIR, Style CG, Style CGI.
Standard: ASME, DIN, BS EN1092, JIS and NF etc.
OEM: Available
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Product Description:

Description:

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 centering ring and/or inner retaining ring. The outer centering 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 flange and should not protrude into the pipe or project from the flange.

Type:

1) Style R

Style R is the basic type of spiral wound gasket. Style R’s inner diameter and outer diameter has a few laps metal strips that do not fill the fillers. They maintain the compression and sealing. The Style R spiral wound gasket is normally used for tongue and groove, male and female type joint of flanges.

2) Style RIR

The inner ring is between the bore diameter and the inner diameter of the gasket. It is designed to prevent accumulation of solids, reduce turbulent flow of process fluids and minimize erosion at flange faces. It’s used for male and female flanges.

3) Style CG

The centering ring accurately make the spiral ring on flange face. It provides an extra radial strength to protect the spiral ring. Style CG gaskets are suitable for flat face flange and raised face flange.

4) Style CGI

The style CGI spiral wound gasket is combined the advantages of centering ring and inner ring. Suitable for high temperature and high pressure. It can be used for above Class 900, corrosive medium or other harsh working conditions.

Spiral wound gaskets also have some other special types gasket, like style HE, style 625 and etc. It can be used in special application.

Material & Configuration:

Winding Hoop & Inner or Outer Ring		Filler			Normal Thickness(mm)
Material	Code	Material	Code	Temperature(℃)	V Shape/Ring
Carbon Steel	CS	Asbestos	ASB	500	3.2/2.0 4.5/3.0	4.8/3.0 5.5/4.0 7.5/5.0
Stainless Steel	304(L)、316(L)	Graphite	FG	650
Monnel	Mon	PTFE	PTFE	250
Nickel，Titanium	Ni,Ti	Mica	MICA	950
Inconnel	INC	Ceramic	CER	1000
Hastelly c276，zirconium	HAST,ZIRC	Non-asbestos	NAF	300

Main Technical Data:

Filler	Temperature	Pressure
Graphite	-200℃~+550℃	250MPa
Asbestos	-150℃~+450℃	100MPa
PTFE	-200℃~+260℃	100MPa

Terence of spiral wound gasket:

	DIN (mm)	ANSI B16.5	API 605	Tolerance(mm)
		BS1560 (mm)
		Mss sp-44
Inner Diameter of Inner Ring/Inner Diameter of Gasket	<=600	<=24"	>=26" and <=34"	±0.5
	>600 and <=800	>24" and <=34"	>=36" and <=60"	±0.9
	>800 and <=1600	>34" and <=60"		±1.3
	>1600	>60"		±1.6
Outer Diameter of Gasket	<=600	<=24"	<=24"	±0.9
	>600 and <=160000	>24" and <=60"	>24" and <=60"	±1.8
	1600	>60"		±2.2
Diameter of Outer Ring			>=1/2"and<=60"	±0.9
	<=600	<=24"		0-1.0
	>600 and <=1000	>24" and <=34"		0-1.8
	>1000 and <=1600	>34" and <=60"		0-2.2