Sigma 5000 pages
FLEXITALLIC
SIGMA 500
FLEXITALLIC LIMITED
PO BOX 3, MARSH WORKS, DEWSBURY ROAD
CLECKHEATON, WEST YORKSHIRE BD19 5BT
TEL: 01274 851273
FAX: 01274 851386
PRODUCT
REFERENCE:
FLEXITALLIC SIGMA 500
DESCRIPTION:
SIGMA 500 is a high performance biaxially orientated sheet sealing material containing
PTFE and hollow glass microspheres.
COLOUR:
Blue
SERVICE:
Sigma 500 is specifically designed for use in flanges where only low bolt loading is
available. Such flanges can be glass lined, ceramic, plastic or be so distorted that they
include areas of low gasket stress.
Suitable for sealing all chemicals across the whole pH range (0-14) with the exception of
molten alkali metals, fluorine gas, hydrogen fluoride or materials which may generate
these.
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.
WRAS Approved for use with potable water: Approval No. 030511
Do NOT use gasket pastes.
TYPICAL PHYSICAL PROPERTIES:
Thickness
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
mm
gcm-3
%
%
MPa
MPa
mL/min
mL/hr
%
1.5
1.4
35
44
14
30
<0.1
0.65
31
3.0
1.4
30
43
10
26
<0.1
0.75
47
AVAILABILITY:
Sheet size:
2.0 m x 2.0 m
For large sizes, welded gaskets are available.
Thickness range:
0.75 mm to 3.2 mm
Other thicknesses may be available on request.
PDS 189
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.