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UltraFlex™ Convoluted PTFE Hose, Ultra-Flexible, Spiral Vent, Heavy Duty, Flared-Thru Fittings, Stainless Steel or Polypropylene Braid

The UltraFlex™ Convoluted Hose is made with the thickest seamless PTFE liner in the industry and offers the largest size range (1/2" - 6"), with cuffed, flanged or a variety of other end connections and materials. This makes it ideal for nearly all demanding high purity and chemical applications. Since the open pitch spiral convolutions are self-draining, they facilitate cleaning. The tight bend radius of an UltraFlex hose is perfect for space-constrained locations. To ensure continuous fluid contact with PTFE throughout the hose assembly, the PTFE liner can be cuffed and flared through for a continuous fluid conduit.

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Product Features & Benefits

  • CORROSION RESISTANT: PTFE is fully resistant to the broadest range of industrial chemicals and has a zero-corrosion rate with lower life cycle costs. Does not stress fatigue or stress corrode like metal hoses.
  • THICK SEAMLESS PTFE LINER: manufactured with the industry’s thickest seamless PTFE liner and provides the widest size range (1/2” – 6”) making it exceptionally suitable for a wide range of demanding applications that require high purity and chemical resistance.
  • CLEANABLE: Non-Stick, low porosity tube is self-cleaning and does not trap bacteria and can be cleaned with steam, detergents, caustics or solvents.
  • SELF-DRAINING: The self-draining feature of the open pitch spiral convolutions enables easy cleaning.
  • SANITARY: FDA- approved materials meet or exceed Pharmacopoeia Class VI and 3A standards.
  • COMPATIBLE: Will not contaminate or impart a taste, color, or odor to any media.
  • FLEXIBLE AND LIGHT-WEIGHT: The ultra flexible, light-weight engineered design resists cracking and stress corroding.
  • TIGHT BEND RADIUS: The UltraFlex™ hose offers an ideal solution for compact areas due to its exceptional tight bend radius.
  • DURABLE: Engineered for extended use in hostile environments involving severe chemical, thermal, and mechanical stresses. Does not suffer from aging or embrittlement like rubber even with extreme thermal cycling.
  • PTFE LINER CAN BE CUFFED AND FLARED: To maintain uninterrupted fluid contact, the PTFE liner can be cuffed and flared to create a seamless fluid pathway.
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Braid Options Available

  • 316 Stainless Steel Braid Pure PTFE
  • 316 Stainless Steel Braid Static – Dissipating PTFE
  • Polypropylene Braid Pure PTFE
  • Polypropylene Braid Static – Dissipating PTFE

Hose Cover Options

  1. Scuff Sleeve – Protects hose exterior from damage when dragged over rough surfaces.
  2. Fire Sleeve – Protects hose from extreme exterior temperatures. Can be used as insulation and protects personnel from extreme interior temperatures.
  3. Polyolefin - Provides a smooth, cleanable covering over braided hose. Many colors available.
  4. Armor Guard – Protects hose from kinking by not allowing it to exceed its bend radius.
  5. Spring Guard – Provides kink resistance and protects hose from damage when dragged over rough surfaces.
  6. HDPE Armor – Provides kink and wear protection during rough handling. Available in (8) colors for color coding and is the only protective cover that can be installed on an existing assembly.
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Hose Options

Electrically Heated Option

Electrically heated options may be applied to many of the hose assemblies available from PureFlex®.  Our superior insulations and precisely applied heating elements provide the most temperature-stable heated hoses on the market. PureFlex heated hoses are excellent for maintaining viscosity control, freeze protection, and dispensing temperature-sensitive media. Temperature options available from ambient to 450°F (hose selection dependent).

If interested in learning if the electrical heated option can be applied to your specific hose requirements, please complete the Electric Heating Option Form and submit to  

Spiral Vent Tubing

UltraFlex™Spiral Vent Tubing with its heavy wall PTFE makes it ideal for vent tubing or flanged hose assemblies where line pressures are relatively low. Spiral vent tubing assemblies provide excellent flexibility, are light weight and have superior chemical resistance. Available in sizes 1/2" to 6" with cuffed, flanged or a variety of other end connections and materials.

Flared-Thru Fittings

UltraFlex thick PTFE liner can be passed through the end fitting and flared radially outward against the sealing face to provide a continuous PTFE fluid conduit.


  • Cam Lock
  • Flanges
  • Sanitary


Temperature Range

Stainless braid and bare hose temperature range: (-)65°F (-54°C) to (+)450°F (+232°C)
Polypropylene braid temperature range: (-)20°F (-29°C) to (+)250°F (+121°C)
Operating Pressure (psi) Minimum
Bend Radius
Per Foot
  Operating pressure ratings are one-fourth the minimum burst pressure at (+)70°F (21°C)
Pressure and vacuum ratings are based at (+)70°F (21°C)
** 3" is available for full vacuum applications - consult factory
1/2" 400 400 40 1.75 29.9 0.20
3/4" 400 400 30 2.25 29.9 0.35
1" 400 400 30 2.50 29.9 0.50
1-1/4" 325 275 20 3.00 29.9 0.70
1-1/2" 325 250 20 3.25 29.9 0.80
2" 250 225 15 5.25 29.9 0.95
2-1/2" 250 200 15 8.50 29.9 1.50
**3" 175 175 15 9.50 24.0 1.79
4" 150 150 15 11.95 20.0 2.25
6" 75 50 5 15.50 15.0 3.50

Technical Details

  • Applications: Ultra flexible, heavy duty, chemical resistant, sanitary
  • Liner material: PTFE
  • Cover: Stainless steel or polypropylene braid, coverless
  • Size range: 1/2" to 6"
  • Pressure rating: Full vacuum to 400 PSI
  • Temperature range: -65°F to +450°F


  • Sanitary Applications
  • Cleanable Applications
  • Ultra Flexible Uses
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This resource is intended as a guideline to be used with all available information to determine suitability of material selection. We suggest thorough research which should include known applications when determining material. The information contained herein is provided only as a guide for the use of ANDRONACO INDUSTRIES products.

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