PTFE Bellows Connectors

Tef-Flex Convoluted PTFE Bellows

Tef-Flex Style 112A and 113A Convoluted PTFE Bellows Expansion Joints and Flexible Couplings offer the best combination of low spring-rate flexibility, temperature resistance, and the chemical inert properties of PTFE material. The “Tef-Flex” Style 112A 2-Convolute Flexible Coupling, and Style 113A 3-Convolute Expansion Joint were designed to meet the needs of the HVAC, high-technology, and chemical/petrochemical industries.

The construction of the “Tef-Flex” connector utilizes 2, 3, or even 5 molded convolutions of white PTFE. These convolutions are reinforced with metallic rings between the bellows for pressure rating and stability. Standard galvanized ductile iron backing flanges are protected by the lip of the PTFE bellows, so that all wetted surfaces are PTFE. Steel limit rods are factory installed. Additional convolutions provide greater movement capability. Style 112(316)A and 113(316)A include Type 316 stainless steel backing flanges and hardware. Options include high purity cleaning and packaging. “Tef-Flex” expansion joints can also be manufactured in machined, accordion style.

The “Tel-Flex” bellows connectors are versatile and will:

  • absorb pipe movements and stress;
  • isolate mechanical vibration;
  • reduce system noise;
  • protect against surge forces.

“Tef-Flex” connectors are suitable for connection to metallic piping or plastic lined metallic piping.

Sizes
Material
For Piping Styles
To Accommodate Insulation Thicknesses
To Accommodate Thermal Growth
Motion Capability
Provision For Copper Pipe
Provision For Insulation
1/2″ through 24″Carbon steel. Painted for rust protectionSteel, stainless steel, copper (requires dialectric spacer)1″ to 4″3″ to 12″ (Depending on size and style)3″ to 12″ (Depending on pipe size and body style)Specify dialectric spacerGap between outer body and spider varies so that user can pack with insulation. Specify 1, 1-1/2, 2, 2-1/2, 3, 3-1/2, or 4

Ultralon PTFE Lined Metal Bellows

The unique Unisource “Ultralon” expansion joint combines the properties of metal and fluoroplastics into the most advanced, versatile expansion joint on the market today. Ultralon was designed to meet the process piping needs of the high-technology, chemical/petrochemical, power generation, pulp and paper, and other demanding needs. The Ultralon expansion joint is versatile and will:

  • Absorb pipe movements and stress
  • Isolate mechanical vibration
  • Reduce system noise
  • Protect against surge forces

Ultralon is a problem solving product in many high temperature applications. Unlike ordinary solid PTFE or elastomeric joints, should up-set conditions exceeding 500 °F occur, Ultralon will maintain its pressure carrying capacity up to 1200°F—long enough for system shut-down and replacement.

The construction of the Ultralon expansion joint utilizes a stainless steel, Inconel, Monel, or Hastelloy bellows in combination with a PTFE lining formed into the bellows during manufacture. Ultralon expansion joints can offer working temperatures from -300°F to +400°F, and a choice of bellows rated for working pressures of 50, 150, or 300 psi. Gimbal, hinged, dual externally pressurized, and pressure balanced styles are construction options. Flanges are available in carbon steel, stainless steel, or Teflon coated. Ultralon expansion joints can be manufactured in custom overall lengths and in custom movement capabilities. Consult Unisource for information on the special construction you need for your application.

Series 1501TN PTFE Lined Rubber Expansion Joint

Ideal for connection to chemical handling equipment or high-purity applications, Series 1501TN expansion joints combine the properties of a rubber spool-type single arch product with the chemical resistance and high purity characteristics of PTFE. This product begins with a white PTFE arch type liner. Rubber is hand-wrapped around the liner, polyester reinforcing is added, and a rubber cover is wrapped and duck and rubber flanges are added. The PTFE liner is flared over the flanges so that all wetted surfaces are PTFE. When required, the cover can be coated with a yellow Hypalon coating for added environmental protection and to create a non-marking exterior. Permanent embossed branding lists serial number and cure date. Retaining rings and control units are available in either plated carbon steel or stainless steel. Our “Clean-Pak” option provides ultra-high purity cleaning and packaging and is widely accepted in the microprocessing industry for RODI applications.

Tube & CoverNeoprene, EPDM, Nitrile, Chlorobutyl or Hyapalon
ReinforcementPolyester fabric. Aramid fiber available upon request for high pressure/temperature applications
Pressure Range160 PSIG to 225 PSIG (Depending on size)
Sizes1″ through 16″
LinerWhite PTFE
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