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
TWOK & TBOK Series Hose (Kynar® Braid)
Unit of Measure
Items TWOK & TBOK Series Hose (Kynar® Braid)
12TWOK
TWOK & TBOK Series Hose (Kynar® Braid) 		TWOK & TBOK Series Hose (Kynar® Braid) (12TBOK)
12TBOK
TWOK & TBOK Series Hose (Kynar® Braid) 		TWOK & TBOK Series Hose (Kynar® Braid)
16TWOK
TWOK & TBOK Series Hose (Kynar® Braid) 		TWOK & TBOK Series Hose (Kynar® Braid) (12TBOK)
16TBOK
TWOK & TBOK Series Hose (Kynar® Braid) 		TWOK & TBOK Series Hose (Kynar® Braid)
24TWOK
TWOK & TBOK Series Hose (Kynar® Braid)
Inside Diameter N/A 0.75 in19.1 mm N/A 0.75 in19.1 mm N/A 1.0 in25.4 mm N/A 1.0 in25.4 mm N/A 1.50 in38.1 mm
Outside Diameter N/A 1-1/8 in29.2 mm N/A 1-1/8 in29.2 mm N/A 1-3/8 in35.6 mm N/A 1-3/8 in35.6 mm N/A 2-1/8 in53.3 mm
Max. Length N/A 70 ft N/A 70 ft N/A 65 ft N/A 65 ft N/A 70 ft
Max. Working Pressure1 N/A 200 psi1.38 MPa N/A 200 psi1.38 MPa N/A 200 psi1.38 MPa N/A 200 psi1.38 MPa N/A 175 psi1.21 MPa
Min. Burst Pressure2 N/A 800 psi5.52 MPa N/A 800 psi5.52 MPa N/A 800 psi5.52 MPa N/A 800 psi5.52 MPa N/A 700 psi4.83 MPa
Min. Bend Radius N/A 3.00 in76.20 mm N/A 3.00 in76.20 mm N/A 4.00 in101.60 mm N/A 4.00 in101.60 mm N/A 5.00 in127.00 mm
Vacuum Hg (@ 70ºF)3 N/A 29.9 in75.95 mm
Inner Tube N/A Chemfluor® White N/A Chemfluor® Black N/A Chemfluor® White N/A Chemfluor® Black N/A Chemfluor® White
Weight N/A 0.25 lbs/ft0.37 kg/m N/A 0.25 lbs/ft0.37 kg/m N/A 0.35 lbs/ft0.52 kg/m N/A 0.35 lbs/ft0.52 kg/m N/A 0.65 lbs/ft0.97 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
  • Product transfer
  • Caustic solutions
  • Liquid chlorine
  • Bromine
 		N/A
  • Base chemicals
  • Corn syrup
  • Hexane
  • Product transfer
  • Caustic solutions
  • Liquid chlorine
  • Bromine
 		N/A
  • Base chemicals
  • Corn syrup
  • Product transfer
  • Caustic solutions
  • Liquid chlorine
  • Bromine
 		N/A
  • Base chemicals
  • Corn syrup
  • Hexane
  • Product transfer
  • Caustic solutions
  • Liquid chlorine
  • Bromine
 		N/A
  • Base chemicals
  • Corn syrup
  • Product transfer
  • Caustic solutions
  • Liquid chlorine
  • Bromine
Details N/A Construction:
  • Inner Tube:
    -Chemfluor® white PTFE
  • 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
 		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
 		N/A Construction:
  • Inner Tube:
    -Chemfluor® white PTFE
  • 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
 		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
 		N/A Construction:
  • Inner Tube:
    -Chemfluor® white PTFE
  • 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
  • FDA
  • Pharmacopeia Class VI
 		N/A
  • USDA
  • Pharmacopeia Class VI
 		N/A
  • USDA
  • FDA
  • Pharmacopeia Class VI
 		N/A
  • USDA
  • Pharmacopeia Class VI
 		N/A
  • USDA
  • FDA
  • 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.