Molded
Expansion Joints (Style ML-50)
and Flexible Couplings (Style ML-49) |
 MOLDED
EXPANSION JOINTS
3P
molded expansion joints and flexible couplings were specially
developed to withstand the higher pressures and temperatures in
today's piping systems. Each molded joint and coupling bellows contain
the physical properties required for fatigue-proof operation,
including:
- High density
for low permeability
- High tensile
strength for greater working pressures
- Low
crystallinity for longer flex life
- Material
orientation for reduced stress concentrations and/or premature
fatigue failure
Each ML-49 and
ML-50 comes with metal flanges and tapped bolt holes that accommodate
bolts in accordance with ANSI B16.5. Additional tapped holes are
available for connecting Corning Style II flanges, if requested.
Click
here for Specifications
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| MOLDED
JOINT MOVEMENTS |
The
flexible molded bellows of ML-50 expansion joints are capable of
handling all of the following movements:
- Longitudinal
- also called travel or axial compression and extension
- Angular
Misalignment - called angular deflection and angular rotation,
is the displacement of one flange in relation to the other causing
them to lie in nonparallel planes
- Parallel
Misalignment - called offset or lateral deflection, is the
displacement of one flange in relation to the other while they lie
in parallel planes
- Maximum
Travel is based on installation with no Misalignment or Angular
Deflection
- Maximum
Misalignment is based on installation with no Travel or Angular
Deflection
- Combined
Travel and Misalignment are proportionately lower for each type
of deflection according to the percentage of the "Maximum"
that is required for the other.
- Specifications
|
| MOLDED
JOINT WORKING PRESSURE vs. TEMPERATURE |
| The
graphs to the right indicate that ML-50 PTFE molded joints, like other
expansion joints, and ML-49 couplings drop in pressure rating as the
temperature increases. It is important to note however that burst
pressure of ML-50 joints (or that pressure at which bellows failure
normally occurs) is approximately four times that of their working
pressure. Please consult 3P technical staff for modifications if
pressure and temperatures in your application exceed those shown
below.
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|
| VACUUM
SERVICE |
| ML-50
and ML-49 molded joints, with their thick walls of highest quality
PTFE, are designed to operate under full vacuum conditions. The graph
to the right shows the maximum operating temperature each bellows size
will withstand under full vacuum. For higher temperature / full vacuum
applications, consult 3P for special designs.
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|
 For
more information, contact us! |
Expansion Joints available in
Rubber - Teflon
- Metal - Flue Duct - Pump Connectors
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