Spitmaan Spiral Wound Gaskets
Construction:
Special Spring like Metal strips are wound
with an Asbestos Filler by a
special process to assure a leak proof seal.
The sealing is done by the Asbestos Filler and
the metal strip provides the spring. This
combination of metal and soft asbestos Filler
piles compresses to its predetermined
thickness under bolting pressure and thereby
preventing leakage within the limit of its
specified pressure and temperature ranges. With the
addition of Centering devices, adapt "SPITMAAN"
Spiral Wound Gaskets to use on
many types of flanges and closures.
Materials:
Standard materials are type 304 Stainless steel
with white Canadian (Chrysotlie) Asbestos Filler.
Materials
available are:
|
Metals |
Fillers |
| Type 304 Stainless |
Compressed Asbestos Jointing Strips |
|
Type 316 Stainless |
P.T.F.E. Sintered Strip |
|
Aluminium |
Asbestos paper |
|
Copper |
White Chrysotile Asbestos |
|
Monel |
Blue African Crocidolite |
Steel, Plain
Steel, Zinc Coated |
Grafseal |
Gasket Thickness
Available:
|
Normal |
Actual |
| 1/8"
(3.2 mm) |
.125" ±
.005" (3.2 mm) |
|
3/16" (4.8mm) |
.175" ±
.005" (4.5 mm) |
Hints Of
Installation & Maintenance:
When installing a Spiral Wound Gasket, check
the dimensions of the Gaskets for use between
pipe and pressure vessel flanges. The
procedure is as follows:-
Measure ID of flange contact face.
Measure Gasket ID. If Gasket ID is not 1/8" larger
than flange ID, do not use it unless it can be
installed perfectly centered. A
Spiral Wound Gasket does not have the same feel as
other Metallic or Non-Metallic Gaskets during the
bolting-up. It's different-because it gives a
little bit under each bolt as it is tightened. It
is therefore important to tighten the bolts in
small steps in proper sequence as shown hereunder.
Final tightening must be uniform with each bolt
pulling same load. This will guarantee a trouble
free joint. If not uniform, the joint may
leak-particularly after it has been in hot
service. Tighten the bolts after 24 hours and
again a week later.
How To Order:
When ordering "SPITMAAN" Spiral Wound Gaskets,
give the following information:
-
Quantity
-
Gasket shape
-
Inside and outside
Dimension of Gaskets
-
Flange width
-
Gasket Thickness
-
Operating Pressure
-
Operating Temperature
|
