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KC Multi-ring AC Backing Flanges |
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 Backing Flanges 463 Kb .pdf file |
A line of steel backing flanges engineered using our patented design. The backing flanges are an integral part of the KC Sealing System of gaskets, backing flanges, and SmartBox™ Installation Tool. KC Multi-Ring Products, Inc. gives the UPW user the most comprehensive and best-designed system for sealing and installing critical flanged joints. The KC Multi-Ring® backing flange directs the clamping force toward the pipe I.D. |
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| Comparative tests on 225mm/9" piping run at
our state-of-the-art sealing test facility indicate that after bolt-up,
conventional backing flanges deflect and single-point load the outside
edge of the pipe flange, creating its seal on only approximately the last
1 /4" of the flange face. With conventional backing flanges, the clamping force is approximately 2" outside of the pipe I.D. This in turn allows the flange face to deflect at pressures greater than 105 psig (lower than most users' initial hydro test) which allows hydro test medium and contaminants to be trapped between the flange face and the gasket surface. This is an ideal breeding ground for bacteria after the hydro test and flushing sequence. These contaminants may be introduced into the system to contaminate the end product, or plug down-stream filters, whenever the pressure at any joint is raised above 105 psig by water "hammering" when valves open and close during normal system operation. Conventional backing flanges have been known to distort the flange adapter, resulting in a "cupped" thermal set, particularly when installed with elastomeric gaskets. The KC Multi-Ring® backing flange design, which directs the clamping force toward the pipe I.D, eliminates this flange distortion and will, over time, return a "cupped" flange adapter to its original flat state. Our tests further indicate that when the PTFE over EPDM gasket is used
with conventional backing flanges, the clamping force is directed outside
of the PTFE cover, which may allow the medium to contact the EPDM
substrate. On the other hand, the KC Multi-Ring® backing flange is loaded
at a point at or near equilibrium. This means that equal, or near equal,
clamping force is distributed from the I.D. to the O.D. All the while, the
oint of contact remains at a given point during tightening of the
flange bolts. Independent Finite Element Analysis results show better
loading and less flange stress than conventional backing rings, and the KC
Multi-Ring® gasket is stressed equally and maintains a seal at the I.D. of
the pipe. |
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| Properly installed, there should be little or
no bacteria breeding ground with the KC Multi-Ring® UltraPure gasket
installed with the KC Multi-Ring® AC backing flange. Unlike conventional
backing flanges, the KC Multi-Ring® backing flange provides a positive
seal before, during, and after hydro test and flushing, and, most
importantly, during system operation. The KC Multi-Ring® backing flange will make any gasket seal better than standard backing flanges. Best results are obtained when our flange is combined with the equal gasket compression characteristics of our KC Multi-Ring® UltraPure Gasket. Backing Flanges 463 Kb .pdf file |
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©Copyright 2005 KC Multi-Ring Products, Inc. All rights reserved. Information in this document is subject to change without notice. |
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