Ethylene Flexijoint PTFE expansion joints are flexible connectors and tremor barriers designedto compensate for misalignment, absorb expansion and contraction, and isolate vibration andshock in process piping, tanks and pumps. They also offer a low spring rate to protect stresssensitive FRP, glass or graphite equipment.Flexijoint has almost universal chemical inertness, high andlow temperature resistance, invulnerability to ozone andsunlight, outstanding flex life, and low acoustical impedance(sound dampening properties). • Available in sizes ½” to 42”
Flexijoint Distinctive Features. Flexijoints VIRGIN PTFE RESIN PURE 100% have a low spring rate which protects stress sensitive FRP, glass or graphite installations. Exclusive Fluoroforming process utilizes only high molecular weight resin. PTFE bellows has nearly universal chemical inertness. Zero pigments or additives – fillers contaminate contacting fluids by High & low temperature resistance. leaching out and are vulnerable to blistering. Uv Stabalized. Ethylene’s Fluoroform process results in lower permeation rates, increased flexlife & maximum tensile strength. Outstanding flex life.
Flexijoint Distinctive Features. UNIFORM WALL THICKNESS Fluoroforming insures multiple convolution walls of uniform thickness. Consistent wall and geometry is key in Flexijoints performance. Deep convolutions allow for increased axial travel and reduces the force necessary to produce movement or lateral misalignment.
Flexijoint Distinctive Features. T-BAND ROOT & SIDEWALL SUPPORT T-Band reinforcement on the outside of the convolutions provide support at the root and sidewall. This promotes improved service life and increased safety in high pressure applications. As pressure & temperature increase, the sidewall of the PTFE convolutions conform to the T-Bands, which provides improved stability.
Flexijoint Distinctive Features. T-BAND PROTECTION FROM OVER COMPRESSION T-Bands not only contribute to the pressure rating of the expansion joint, they limit the total Axial movement in compression. T-Bands butt when maximum compression limit has been reached. This gives protection against excessive compression.
Flexijoint Distinctive Features. LIMITLINK FEATURES LimitLinks are Stainless Steel cables that conform to MIL-C5424, specification for Aircraft Cable. Stainless Steel ball-shaped terminals are swaged to the ends of the cables. LimitLink ends are anchored in the Flexijoint Flanges to prevent over expansion. Terminals are free to swivel as flanges change position for adjustment to all misalignments.
Flexijoint Distinctive Features. LIMITLINKS & T-BAND BENEFITS LimitLinks provide easy installation even when mating flange bolts do not align. LimitLinks NEVER need to removed for installation. T-Bands cover approximately 75% of the outside of the convolutions, providing protection from external damage.
LIMITLINK & DURCOR-62 LimitLink is Ethylene’s Standard. Durcor-62 Flange option. Advanced Composite Resin, the strength of steel & half the weight. Zero corrosion.
LIMITBOLT LimitBolt design offers resistance to rotational forces. Limits lateral misalignment. Flexijoint LimitBolt design does not require removal of limitbolts during installation.
ANTISQUIRM Each T-Band incorporates 3 radial spokes which rest on the limitbolts, thereby restraining the T-Bands that hold the convolutions in balanced geometrical position. This feature eliminates squirming and buckling effects and dramatically increases operating pressure capabilities in multi- convoluted Flexijoints.
FLEXARMOR PTFE Liner. Metal Expansion Joint outer. Provides dual containment feature. Metal Outer Expansion Joint produces higher pressure ratings than standard PTFE Flexijoints.
HINGED Hinged style expansion joints contain pivots which allow the unit to only bend in a single plane. The hinged mechanisms absorb pressure, thrust and other external loads, such as the weight of adjacent piping, reducing the need for additional supports and anchors.
UNIVERSAL Universal Flexijoints consist of 2 bellows separated by a PTFE lined spool piece. Universal Expansion Joints accept large amounts of lateral deflection and substantially reduce the spring rate required to cause movement.
GIMBALLED Gimballed units are basically the same as Hinged units except that instead of being limited to deflection in only a single plane, it can accept bending in any plane. It contains 2 sets of hinges connected to a central floating Gimbal ring. Gimballed joints are used in complex piping systems when proper guiding and anchoring may not be feasible.
ANCHORBASE AnchorBase units have a anchor built around a LimitBolt Flexijoint. It is able to be bolted to flooring, footing or other structure of suitable mass. Distance from Flexijoint centerline to base bottom conforms to ANSI B16.5 for 150# base fittings.
FLEXIJOINT OPTIONS Liner Sleeves - Recommended when the media contains solids, material that may settle in the convolutions, the velocity is high or the media is steam. VacuBands - The vacuum rating of all PTFE expansion joints decreases with increasing temperature, diameter and # of convolutions. VacuBands enable Flexijoints through 42” diameter to be rated for full vacuum at 450 degrees F.
FLEXIJOINT OPTIONS - CONTINUED Safety Shields - Used in hazardous service applications to protect against serious personal injury in the unlikely event of a failure. Safety shields help to contain media in a confined space should a failure occur. Special Alloy Flanges. Monel LimitLinks.
COMPETITIVE PRODUCT PTFE Molding”“ is an joints over–12”tube is heated above the transition All PTFE expansion Molded” a in diameter are made Jugs and the “Blow Bellows Blowexcellent low cost technique for Milk outside of Soda USA. Ethylene is the sole between Manufacturer of liability. Bottles where yielding of the plastic is not a potentialPTFE Expansion temperature and is placedDomestic two halves of a mold and is forced to Joints the shape of the mold by air pressure. Wall thickness distribution is acceptup to 42” diameter. Paste Extrusion Tubing - in this process hydrocarbon additives (Isopar) severely impacted and is inconsistent from root to wall to crest. This must be added to the PTFE as a lubricant in order to facilitate the compromises the materials mechanical integrity and can cause sudden extrusion process. These solvents are hazardous and contaminate premature failure. contacting fluids by leaching out and could be vulnerable to blistering. Flexijoint Competition
COMMON APPLICATIONS Piping - All piping used in the transfer of fluid expands and contracts a known amount per degree of temperature change. Flexijoints allow for the expansion, contraction and lateral offset of the piping system. Pumps - Flexijoints are excellent vibration control units for pumps. They absorb vibration that is generally transferred to adjacent piping thereby eliminating piping leaks and extending pump bearing and seal life. Weigh Cells - Low spring rate improves scale accuracy.