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Tube test seals<br />
Special duty products<br />
Tube test seals<br />
High-pressure hydrostatic testing<br />
We manufacture two types of seal<br />
that are specifically designed to<br />
operate with tube testing machines<br />
that repeatedly seal and release the<br />
tube ends as part of the hydrostatic<br />
testing process.<br />
The quality of such seals is a crucial<br />
factor in the reliability of the machines’<br />
operation; our tube test seals therefore<br />
provide the highest levels of performance.<br />
Other designs are available on request.<br />
Polyurethane seals<br />
Description<br />
These are manufactured from high tensile,<br />
impact resistant polyurethane. They<br />
provide excellent wear resistance and<br />
will operate at high or low pressures. A<br />
special lip profile is incorporated to enable<br />
tube entry without seal damage.<br />
Special features<br />
• Dual or single hardness seals.<br />
• Colour coded for different test regimes<br />
— test heads or pressure.<br />
• Excellent record of reliability.<br />
• Extremely wear resistant.<br />
• Special lip profile for maximum seal life.<br />
Dual hardness seals<br />
In addition, our fully-moulded dual<br />
hardness seals offer:<br />
• Improved anti-extrusion properties.<br />
• Longer working life.<br />
• Improved tolerance of poor mechanical<br />
conditions.<br />
Operating capability<br />
• Maximum operating pressure: these<br />
seals are regularly used at pressures<br />
in excess of 100MPa (14,500psi) with<br />
thick-walled high pressure rated steel<br />
tubes.<br />
How supplied<br />
Custom manufactured to any size. We<br />
also hold a vast number of mould tools<br />
covering most standards.<br />
Tube Test Seal Type S<br />
Description<br />
This is moulded in wear-resistant<br />
elastomer-proofed fabric. The seal back<br />
is a hard grade of reinforced proofed<br />
fabric that provides considerable torsional<br />
rigidity. The back is fully moulded to lips<br />
of a more flexible proofed fabric, for high<br />
sealing integrity.<br />
A taper on the outside lip ensures efficient<br />
sealing even though an axial float of the<br />
seal is permitted.<br />
Special features<br />
• Self-energising seal that does not<br />
require axial compression.<br />
• Small seal sections compatible with<br />
long seal life.<br />
• Minimum shutdown time for seal<br />
replacement.<br />
• Ease of test head maintenance.<br />
Operating capability<br />
• Maximum operating pressure:<br />
69MPa (10,000psi).<br />
How supplied<br />
Custom manufactured to any size.<br />
Standard sizes available for tubes of<br />
nominal bore from 42.2mm (1.66 in) to<br />
431.8mm (17 in).<br />
38<br />
To order or for further details, call your local contact shown on rear cover or listed at www.jameswalker.biz
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