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Top 20 Tubing and Hose Buying Tips, Part One

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Fluoropolymer Tubing

Contef™ Convoluted PTFE
Fluoropolymer Tubing

Contef™ Convoluted PTFE Fluoropolymer Tubing

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Features

  • Translucent PTFE tubing offers excellent chemical and electrical properties
  • Available from stock with or without a stainless steel wire encircling the O.D.
  • Wire coil provides increased pressure capability and aids in electrical grounding
  • Easily flexed – spiral construction allows far greater flexibility than straight wall tubing
  • Spiral construction also allows for easier cleaning
  • Made from FDA compliant materials

Applications

Chemical ProcessingDeionized Water Transfer Laboratory & Medical Uses Paint Spray Systems Pharmaceutical Processing & Packaging RoboticsUltra-Pure Fluid Systems

Physical Properties**

Hardness, Shore D

Tensile Strength at Break, psi

Elongation at Break, %

Embrittlement Temperature, °F

Min. Operating Temp. for Tubing^^, °F

Max. Operating Temp. for Tubing^^, °F

50-65

3500

200-400

-450

-100

500

**Values listed are typical and are meant only as a guide to aid in design. Field testing should be performed to find the actual values for the application.

^^ Temperatures are for standard extruded (non-convoluted) tubing.

Notes

CONTEF’s helical construction aids in self-cleaning when flushed with standard cleaning fluids.

 

The cuffs (straight ends) are made to accept standard barbed fittings. Hose assemblies made to your specifications are available.

 

PTFE’s color will vary naturally from lot to lot, but the quality and physical properties do not change.

 

FEP CONTEF for longer continuous lengths is available through custom order.

CONTEF Without Wire: Vacuum Service: 27 in./Hg at 72°F. The convolutions are molded into the tubing and will not cold flow into a straight wall under normal conditions.

 

CONTEF With Wire: Vacuum Service: 27 in./Hg at 72°F. For higher vacuum applications, CONTEF can be produced with wire on the I.D. — call for details.

Specifications

Part NumberConstruction(A)
ID (in.)
(B) Nom. Cuff
Lengths (in.)
(C)
Wall (in.)
(D) Nom.
Convolution OD (in.)
(E) Max. Avail.
Lengths - including
cuffs (ft.)
(F) Nom.
Convolution ID (in.)
Working PSI
(at 72°F)
Burst PSI
(at 72°F)
Bend
Radius (in.)
3500070Unreinforced.250 (1/4).750 (3/4)0.0150.321250.18145180.500 (1/2)
3500147Unreinforced.313 (5/16)1.0000.020.4141250.27348192.750 (3/4)
3500224Unreinforced.375 (3/8)1.0000.020.451250.303401601.750 (1-3/4)
3500301Unreinforced.500 (1/2)1.0000.020.591000.425301201.250 (1-1/4)
3500378Unreinforced.625 (5/8)1.250 (1-1/4)0.0230.66750.485301201.500 (1-1/2)
3500455Unreinforced.750 (3/4)1.500 (1-1/2)0.0250.78750.608251001.750 (1-3/4)
3500532Unreinforced1.0002.0000.031.1500.84922902.230
3500609Unreinforced1.250 (1-1/4)2.500 (2-1/2)0.0351.56401.1521852.750 (2-3/4)
3500686Unreinforced1.500 (1-1/2)2.500 (2-1/2)0.041.91401.4120803.000
3500763Unreinforced2.0002.500 (2-1/2)0.0432.45401.95516654.250 (4-1/4)
3520076Wire reinforced .250 (1/4).750 (3/4)0.0150.32120.18158234.500 (1/2)
3520153Wire reinforced .313 (5/16)1.0000.020.414120.27362250.750 (3/4)
3520230Wire reinforced .375 (3/8)1.0000.020.45120.303522081.750 (1-3/4)
3520307Wire reinforced .500 (1/2)1.0000.020.59200.425391561.250 (1-1/4)
3520461Wire reinforced .750 (3/4)1.500 (1-1/2)0.0230.78200.608321301.750 (1-3/4)
3520538Wire reinforced 1.0002.0000.031.1200.849291172.250 (2-1/4)

“E” dimension to be specified at time of order. All lengths will be supplied with ‘B’ dimension cuffs.
All pressures are calculated and not based on actual testing.
ID is the critical dimension for fittings application.

Custom Capabilities

Cut Pieces

All custom products are subject to minimum order quantities and lead times. For other custom options, please contact us.

Contef Tubing

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