Spiral Wound Gasket is the ideal gasket in the semi-metallic category. A narrow strip of V-shap metal hoop is spirally wound under tension with a filler cushion between the lamination of the metal and is spot-welded at both ends.
This unique construction of a spring-like metal and soft filler provides gasket excellent characteristics:
※ Resistance to high temperature and high pressures.
※ Great resilience which allows the gasket to adjust automatically to change in operating conditions, such as pressure and thermal shocks, vibrations etc.
※ Excellent sealability is maintained with comparatively small gasket area.
※ Good tolerance for flange surface finish irregularities.
※ Can be designed to any dimensions economically in circular or moderately noncircular shape. Available in a variety of hoop metals and filler materials to satisfy specific operating conditions.

※Structure:

Type
Cross section
Hoop material
Filler material
Inner, Outer ring material
Normal Thickness

Gaskets
Rings

Basic type

CS,304(L)SS,
316(L)SS,321SS,347LSS,Monel,
Titanium,Inconel,Hastelloy B/C,
Incoloy,etc.
Asbestos
CS,304(L)SS,
316(L)SS,321SS,
347LSS,Monel,
Titanium, Inconel,
Hastelloy B/C
Incoloy,etc.
2.5(.0624”)
3.2(.125”)
4.5(.175”)
6.4(.250”)
7.25(.285”)
2
3
4

With inner ring

Non-asbestos

With outer ring

Flexible graphite

With inner &out ring

PTFE

Ceramic


※Available Sizes:

Item
DIN (mm)
ANSI B16.5
BS1560 (mm)
Mss sp-44
API 605
Tolerances

Inner ring I.D.
Gasket I.D.
≤600
≤24"
≥26" & ≤34"
±0.5

>600 & ≤800
>24" & ≤ 34"
≥36" & ≤60"
±0.9

>800 & ≤1600
>34" & ≤60"
-
±1.3

>1600
>60"
-
±1.6

Gasket O.D.
≤600
≤24"
≥24"
±0.9

>600 & ≤1600
>24" & ≤60"
>24" & ≤60"
±1.8

>1600
>60"
-
±2.2

Outer ring O.D
-
-
≥1/2" &≤ 60"
±0.9

≤600
≤24"
-
0-1.0

>600 & ≤1000
>24" & ≤34"
-
0-1.8

>1000 & ≤1600
>34" & ≤60"
-
0-2.2


Note: We also can produce according to GB4622.2-93,JB4705-92,JB/T4719-92,SH3407-96,HG20610-97,
JB/T90-94,ANSI,API,JPI,JIS,DIS,etc.standards or clients request.