FLEXITALLIC
SIGMA 533
FLEXITALLIC LIMITED
PO BOX 3, MARSH WORKS, DEWSBURY ROAD
CLECKHEATON, WEST YORKSHIRE BD19 5BT
TEL: 01274 851273
FAX: 01274 851386
PRODUCT
REFERENCE:
FLEXITALLIC SIGMA 533
DESCRIPTION:
SIGMA 533 is a high performance biaxially orientated sheet sealing material containing
PTFE with barium sulphate (barytes) filler.
COLOUR:
White
SERVICE:
Suitable for sealing all chemicals across the whole pH range (0-14) with the exception of
molten alkali metals, fluorine gas, anhydrous HF, and sulphuric acid at concentrations >
75 % and at temperatures above 65OC.
Maximum recommended temperature:
260OC (500OF)
Maximum recommended pressure:
8.5 MPa (85 bar; 1235 psi)
These temperature and pressure guides cannot necessarily be used simultaneously and
may not apply at all thicknesses.
Complies with the requirements of FDA regulations.
Do NOT use gasket pastes.
TYPICAL PHYSICAL PROPERTIES:
Thickness
mm
0.8
1.5
2.0
3.0
Density
ASTM Compressibility
ASTM Recovery
ASTM Tensile Strength
DIN Residual Stress @ 175OC
DIN Gas Permeability
ASTM Liquid Leakage; Fuel A 50 psi
ASTM Creep Relaxation
gcm-3
%
%
MPa
MPa
mL/min
mL/hr
%
2.9
11
46
15
35
<0.1
2
17
2.9
8
43
15
28
<0.1
3
33
2.9
8
43
15
24
<0.1
3
40
2.9
7
45
17
19
<0.1
3
51
AVAILABILITY:
Sheet size:
2.0 m x 2.0 m
For larger sizes, welded gaskets are available.
Thickness range:
0.75 mm to 3.2 mm
Other thicknesses may be available on request.
PDS 127
07/07
This Data Sheet refers to the material as supplied. The information contained herein is given in good faith, but no liability will be
accepted by the Company in relation to same. We reserve the right to change the details given on this Data Sheet as additional
information is acquired. Customers requiring the latest version of this Data Sheet should contact our Applications Engineering
Department. The information given and, in particular, any parameters, should be used for guidance purposes only. The Company
does not give any warranty that the product will be suitable for the use intended by the customer.