Description
DBSM321
SM321 Specification Sheet PDF3:1 Shrink Ratio
Semi-Rigid Heavy Wall
Dual-Wall Adhesive-Lined
Flame Retardant Polyolefin Tubing
Applications
Daburn DAFLEX SM321 is a large size, heavier 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 SM321 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) |
Adhesive Inner Wall (t) |
Internal Diameter (max.) (d) |
Total Wall Thickness (Nominal) (T) | |||||
In. |
mm |
In. |
In. |
mm |
In. |
mm | ||
SM321-0.3 | 7 | 0.3 | 7.6 | 0.0107 | 0.100 | 2.5 | 0.050 | 1.3 |
SM321-0.4 | 10 | 0.4 | 10.2 | 0.0134 | 0.150 | 3.8 | 0.060 | 1.5 |
SM321-0.75 | 20 | 0.75 | 19.1 | 0.0294 | 0.22 | 5.6 | 0.105 | 2.7 |
SM321-1.1 | 28 | 1.1 | 27.9 | 0.0348 | 0.375 | 9.53 | 0.120 | 3.1 |
SM321-1.3 | 33 | 1.3 | 33.0 | 0.0348 | 0.375 | 9.5 | 0.120 | 3.1 |
SM321-1.5 | 38 | 1.5 | 38.1 | 0.0410 | 0.5 | 12.7 | 0.140 | 3.6 |
SM321-1.7 | 43 | 1.7 | 43.2 | 0.0410 | 0.5 | 12.7 | 0.155 | 3.4 |
SM321-2 | 51 | 2.0 | 50.8 | 0.0375 | 0.75 | 19.1 | 0.155 | 3.4 |
SM321-2.7 | 70 | 2.7 | 68.6 | 0.0482 | 0.90 | 22.9 | 0.155 | 3.4 |
SM321-3 | 76 | 3.0 | 76.2 | 0.0353 | 1.25 | 31.8 | 0.155 | 3.4 |
SM321-3.5 | 90 | 3.5 | 88.9 | 0.0353 | 1.25 | 31.8 | 0.155 | 3.4 |
SM321-4" | 100 | 4.0 | 101.6 | 0.0455 | 1.75 | 44.5 | 0.155 | 3.4 |
SM321-4.5 | 115 | 4.5 | 114.3 | 0.0442 | 1.75 | 44.5 | 0.170 | 4.3 |
SM321-5 | 130 | 5.1 | 130.0 | 0.0442 | 1.75 | 44.5 | 0.170 | 4.3 |
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 1013W - 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 | ||
