Description
DBSM320
SM320 Specification Sheet PDF3:1 Shrink Ratio
Semi-Rigid Medium Wall
Dual-Wall Adhesive-Lined
Flame Retardant Polyolefin Tubing
Applications
Daburn DAFLEX SM320 is a large size, medium wall adhesive lined, large ratio, heat shrinkable tubing with a meltable adhesive liner. When 120°C is applied, the tubing will shrink to 1/3 of its supplied size. As the outer wall shrinks the inner adhesive liner melts and flows. When cooled, it offers protection for a variety of electrical applications such as insulating and sealing cable splices, terminations and jacket repairs as well as retrofitting. It provides sealed-in protection from chemicals and oils. DAFLEX SM320 is ideally suited for shipboard, submersible, direct-buried installations or wherever tougher mechanical protection is required in an electrical insulation system. Daburn SM320 also resists abrasion, UV radiation and is RoHS compliant.
Features
- Shrink ratio: 67% or more in the radial direction, 20% or less in the axial direction
- Continuous operating temperature: - 55°C (-67°F) to 125°C (230°F)
- Flammability: UL-VW-1, CSA OFT (except clear)
- High Carbon Black composition to resist UV radiation
- To UL 224 Standard
- RoHS Compliant
- Minimum Shrink Temperature: 120°C
Product Sizes and Dimensions
Daburn Item Number
|
mm size
| Expanded | Recovered | ||||
Internal Diameter (min.) (D) |
Internal Diameter (max.) (d) |
Total Wall Thickness (Nominal) (T) | |||||
In. |
mm |
In. |
mm |
In. |
mm | ||
SM320-0.3 | 7 | 0.276 | 7.0 | 0.098 | 2.5 | 0.032 | 0.80 |
SM320-0.4 | 10 | 0.402 | 10.2 | 0.150 | 3.8 | 0.060 | 1.52 |
SM320-0.75 | 18 | 0.752 | 19.1 | 0.220 | 5.6 | 0.060 | 1.52 |
SM320-1.1 | 27 | 1.098 | 27.9 | 0.374 | 9.5 | 0.105 | 2.67 |
SM320-1.3 | 33 | 1.299 | 33.0 | 0.374 | 9.5 | 0.105 | 2.67 |
SM320-1.5 | 38 | 1.500 | 38.1 | 0.500 | 12.7 | 0.140 | 3.56 |
SM320-1.7 | 45 | 1.7 | 43.2 | 0.5 | 12.7 | 0.155 | 3.4 |
SM320-2 | 50 | 2.00 | 50.8 | 0.752 | 19.1 | 0.142 | 3.60 |
SM320-2.7 | 70 | 2.701 | 68.6 | 0.902 | 22.9 | 0.135 | 3.44 |
SM320-3 | 75 | 2.953 | 75.0 | 1.252 | 31.8 | 0.104 | 2.64 |
SM321-4" | 100 | 3.937 | 100.0 | 1.752 | 44.5 | 0.104 | 2.64 |
SM320-4.5" | 115 | 4.488 | 114.0 | 1.752 | 44.5 | 0.130 | 3.30 |
SM320-5.5 | 140 | 5.512 | 140.0 | 1.654 | 42.0 | 0.138 | 3.5 |
Standard Color: Black and Red (where indicated by -2). Please call for other colors.
All sizes sold in 4 foot lengths only.
Specification/Test Values
Property | Test Method | Value | ||
Physical
| Unaged | Tensile strength | ASTM D638 | Min. 1,200 psi |
Elongation | Min. 200% | |||
Aged | Tensile strength | ASTM D638 | Min. 1,000 psi | |
Elongation | Min. 100% | |||
Fluid Resist. | Tensile strength | 24°C /24 hrs 6 Fluids | Min. 750 psi | |
Dielectric strength | Min. 200 Volts/Mil. | |||
Low temperature flex | -55°Cx4hrs | No cracks | ||
Heat shock | 225°Cx4 hrs. | No cracks, flowing or dripping | ||
Secant Modulus | ASTM D882 | Max. 25,000 psi | ||
Electrical | Dielectric strength | ASTM D2671 | Min. 200 Volts/Mil. | |
Volume resistivity | ASTM D876 | Min. 1 x 10^-13 Ohms - cm | ||
Chemical | Copper corrosion | 121°C/16 hrs. | No corrosion | |
Fungus resistance | ASTM G21 | No growth | ||
Water Absorption | ASTM D570 | Max. 0.5 | ||
Flammability | ASTM D2671 | Pass |