Dunham Rubber & Belting Corporation
Dunham Rubber & Belting Corporation
682 Commerce Parkway West Drive, Greenwood, IN 46143
Toll Free: 800.876.5340
Tel: 317.888.3002
Fax: 317.888.2335
Email: mail@dunhamrubber.com
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Chemfluor® PTFE Helically Convoluted Inner Tube
PVDF (Kynart®) Braid
Open Pitch

Features and Benefits

Chemfluor® PTFE inner tube
PVDF (Kynar®) braid
  • For severe applications in hostile environments where external corrosion from the presence of strong acids will attack standard stainless steel braid
  • Ultraviolet stabilized
Unit of Measure

Specifications

Inside Diameter

 N/A 3.00 in76.2 mm

Outside Diameter

 N/A 3-7/8 in99.1 mm

Max. Length

 N/A 30 ft
Max. Working Pressure1 N/A 100 psi0.69 MPa
Min. Burst Pressure2 N/A 400 psi2.76 MPa

Min. Bend Radius

 N/A 12.00 in304.80 mm
Vacuum Hg (@ 70ºF)3 N/A 29.9 in75.95 mm

Inner Tube

 N/A Chemfluor® Black

Weight

 N/A 1.50 lbs/ft2.24 kg/m

Applications

N/A

  • Sanitary transfer
  • Food, flavors and syrups
  • Solvent transfer
  • Drain and sample lines
  • Semi-transparent sight gauges
  • Corrosive environments (external)
  • Liquid chlorine and bromine transfer
  • Chlorinated fluid and gas transfer

Common Media

N/A

  • Base chemicals
  • Corn syrup
  • Hexane
  • Product transfer
  • Caustic solutions
  • Liquid chlorine
  • Bromine

Details

N/A Construction:

  • Inner Tube:
    - Chemfluor® black PTFE electrostatic dissipating conductive
  • Reinforcement:
    -Heavy duty PVDF monofilament
Fittings:
  • PermaSeal® crimp-style
    -Over 40 styles of 316L stainless steel conventional fitting designs
  • Flare-Thru fittings and adapters technology available:
    -150# epoxy-coated carbon steel lap-joint style flanged (standard)
    -304 and 316 stainless steel flanges available (optional)
    -Female cam and groove (swivel style); 316 stainless steel body
    -Sanitary clamp

Engineering Specifications

N/A Temperature Rating

  • -40ºF to +275ºF
  • -40ºC to +135ºC

Industry Approvals & Compliances

N/A

  • USDA
  • Pharmacopeia Class VI

Pressure Rating

N/A Burst Pressure ratings at ambient 70ºF (21ºC). See below on vacuum/pressure ratings at temperatures other than ambient.
Working pressure is given at room temperature. Decrease working pressure to 50 psig for all sizes above 175 ºF.
Vacuum rating all sizes: 29.9" Hg @ 70 ºF. Decrease working pressure rating 1% for every 2 ºF above 175 ºF. 1-1/2" rated @ 24' Hg; 2" rated @ 20" Hg when installed less than 2X minimum bend radius.

  • 1 Working pressure is given at room temperature. Decrease working pressure to 50 psig for all sizes above 175 ºF.
  • 2 Burst pressure ratings at ambient 70 ºF (21 ºC). See below on vacuum/pressure ratings at temperatures other than ambient.
  • 3 Vacuum rating all sizes: 29.9" Hg @ 70 ºF. Decrease working pressure rating 1% for every 2 ºF above 175 ºF. 1-1/2" rated @ 24' Hg; 2" rated @ 20" Hg when installed less than 2X minimum bend radius.