|
Tesitallic® Spiral
Wound
Spiral wound
gaskets are special semi-metallic gaskets of great strength
and resilience. Manufactured by spirally winding V-shaped metal
strips and strips of non-metallic filler with good sealing characteristics,
they are suitable for use under heavy operating conditions
at high temperature and pressures. Applications include the sealing
of flange joints, boilers, heat exchangers, valves and pressure
vessels. Inner rings and outer rings may be added to reinforced
the gasket. A range of metals and filler materials are available
to suit different applications. Standard Tesitallic spiral
wound gaskets are made to fit ANSI B 16.5 and BS 1560 flanges.
Spiral wound conforming to ASME B16.20 specification on request.
Colour coding to industry standard is available. Nominal thickness
available is 4.5mm and 3.2mm. Special request is required for a
nominal thickness of 6.4mm. Non standard spiral wound gaskets are
available in various dimension and shapes for use as flange gasket,
manhole gasket, handhole gasket or other applications. Spiral wound
gaskets is only suitable for circular or moderately non-circular
shapes.Limitations on size and shape largely depends on practical
considerations in the manufacture of the gasket.
|
| Material Selection
Table |
|
Component
|
Material
Type
|
Application
Remarks
|
|
Metal
strips & rings
|
Stainless
Steel SUS 304
|
450 oC
good corrosion resistance
|
|
Metal
strips & rings
|
Stainless
Steel SUS 304L
|
450 oC
high corrosion resistance
|
|
Metal
strips & rings
|
Stainless
Steel SUS 316
|
630 oC
good corrosion resistance
|
|
Metal
strips & rings
|
Stainless
Steel SUS 316L
|
630 oC
high corrosion resistance
|
|
Metal
strips only
|
Monel
|
630 oC
very high corrosion resistance. Not for use in high sulphur
atmospheres
|
|
Rings
only
|
Carbon
Steel
|
For general
use
|
|
Filler
|
Compressed
Asbestos
|
500 oC
good chemical resistance
|
|
Filler
|
Graphite
|
630 oC
good chemical resistance
|
|
Filler
|
PTFE
|
300 oC
excellent chemical resistance. For use in food and potable
water applications
|
|
|
Standard Spiral Wound Dimension Tables
|
| TS D Standard
Spiral Wound (no inner or outer ring). |
|
|
|
Manufactured
using electronically controlled machines that ensures high consistency
in dimensions and overall product quality the TS D is the
basic standard spiral wound without inner or outer rings. High purity
(98%) graphite and AISI 316 stainless steel strip is used as standard.
Other materials are available on request. The V-shaped plies of
metal strip and filler produces a unique spring like effect which
gives the gasket good recovery and high tolerances for flange irregularities.
The Tesitallic TS D is suitable for use as a seal in bonnets, valves
and in flanges.
|
| TS D-2 Standard
Spiral Wound with Inner Ring |
|
|
|
The inner ring
increases the axial stiffness and resilience of the gasket. It also
serves to fill out the crevices between flanges the gasket and hence
serves to minimise the build up of process materials on the flange
AISI 304 stainless steel is the standard material for Tesitallic
spiral wound. Other materials available on request..
|
| TS D-1.2 Standard
Spiral Wound with Inner & Outer Rings |
|
|
|
The TS D1.2
spiral wound is manufactured with both AISI 304stainless steel inner
ring and carbon steel outer rings as standard.
|
| Non Standard
Spiral Wound |
|
|
| Customised spiral
wound with nominal thickness of 4.5mm or 3.2mm is available on request.
Circular spiral wound with or without inner or outer rings may be
manufactured from 20mm to 2000mm in diameter subject to practical
considerations. Rectangular with rounded edges, oval and pear shaped
spiral wound can be manufactured as wound only without outer ring
although an inner ring may be attached under most circumstances. Size
and shape of these gaskets is again subjected to practical considerations.
|
|
|
