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It is a type of semi-metalic gasket, rationally, designed to provide a high performance in use at high temperature and pressur. IT is equipped with an ample compressibility and an increased demand has been seen in these years because of the merit that a gasket seating stress can be controlled by an optimum comressing thickness. It is widely sed at preocess line in thermal power stations, atomic power saioins and vessels of steam turbined engines, It is mad of V-performed thin meal strip and a selected filler material whch are thighl and spirally wound thogether with only metal strip wound in several folds and spot-welded at the beginning and the end of winding.

 
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No skill is required when Installing the gasket because a perfect sealing can be assured only by stressing it to a certain seating thickness.(example original 4.5mm thick gasket may be compressed to 3.2~3.4 mm)
It withstands coincident high temperature and high pressure and stable sel ability can be assured even if the operating conditions should suddenly be change. It would not be broken non cause leakage even if it should receive heat and pressur cycles or themal stress.
No leakage has been expeienced even at very low temp.
It can be used not only on pipping flanges but also on joints of various machinery and equipments by changing material of metal winding and filler of adding centering device and ribs.
Machinery cost can be minized by using the gasket because it ooes nto require fine survace finish of flang(25S is acceptable).
6. It does not stick to flange faces and cleanign or exchange of gasket is quite easy.
 
 
Name Cross section SBR No.
Basic type sprial wound gasket
6590 8590 7590
Spiral wound gasket with outer ring
6591 8591 7591
Sprial wound gasket with inner ring
6592 8592 7592
Sprial wound gasket with outer and inner rings
6596 8596 7596
  SS304 and expanded graphite filler SS304 and Non-asbestos filler SS304 and P.T.F.E filler
 
 
Standard material for SBW's spiral wound gasket is 304 stainless steel with a filler of graphite tape in adition to the standard material, extensive inventories of metal and filler materials ar kept at SBW so theat the most suitable materials may be selected in accordance with working conditions.
The inventories are listed at the right.

 
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is popularly employed. is sometimes employed and
is rarely employed.
Carbon steel is generally emplyed for outer ring even if non
-corrosive metal material is employed to inner ring.
JWE can, on request, utillize any other materials that are availiabel for spiral wound gasket.

Name Type Populatiry
Metal strip
SUS 304
SUS 304L
SUS 316
SUS 316L
SUS 317L
SUS 321
Titanium
Nickel
Monel
Inconel 625
Non-asbestos paper
P.T.F.E Tape
Filler
Mica
Expanded graphite tape
SPCC (Caron steel)
SUS 304
SUS 304L
SUS 316
SUS 316L
Inner ring
SUS 317L
SUS 321
SUS 347
Titanium
Monel
SPCC (Caron stel)
SUS 304
Outer ring
SUS 316
Titanium
 

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