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Need a flexible connector for abrasive powders? The PU-15 features a 1.5 mm TPU wall for extended wear life. 39.0 mg DIN abrasion, FDA 21 CFR compliant.
Entity-Dense Summary:
The PU-15 is a 1.5 mm polyether TPU flexible connector for abrasive powder handling. It uses a single homogeneous wall formed in one continuous extrusion — no layers to delaminate, no fabric to trap powder. The 1.5 mm wall is specified with a 39.0 mg DIN abrasion value and a +0.70 bar / −120 mbar pressure rating, while retaining tool-free snap-in installation and FDA 21 CFR 177.2600 compliance.
Direct-Answer Block
Q: When does a 1.5 mm sleeve beat a 1.0 mm sleeve?
A: When the powder is abrasive — minerals, metal powders, ceramic dust, resins, or recycled material. The 1.5 mm PU-15 wall provides a larger wear reserve than a standard 1.0 mm sleeve without changing the material chemistry. The additional wall thickness provides more material before wear-through, which can help extend replacement intervals in abrasive applications. Actual service life depends on powder characteristics, velocity, vibration, and operating conditions.
Why Wall Thickness Is the Wear Budget
A flexible connector is a consumable. Its service life is the time it takes for the powder stream to abrade through the wall. A 1.0 mm wall is a thin wear budget. A 1.5 mm wall is a larger one.
| WALL THICKNESS | WEAR BUDGET | BEST FOR |
| 1.0 mm (PU-10) | Standard | Light, fine, non-abrasive powders |
| 1.5 mm (PU-15) | Thicker wall | Abrasive, heavy, high-velocity powders |
The material is identical polyether TPU — the difference is the thickness of the sacrificial wall.
Why a Single Homogeneous Wall Matters
The PU-15 is not a layered or fabric-reinforced sleeve. It is a single homogeneous wall of virgin polyether TPU, extruded in one continuous form.
| ATTRIBUTE | PU-15 |
| Material | 100% virgin polyether TPU |
| Wall structure | Single homogeneous wall |
| Internal layers | None |
| Fabric reinforcement | None |
| Powder-contact bore | Smooth, flush, no crevices; no fabric or layer within the wall |
The 1.5 mm wall delivers consistent mechanical strength from the powder-contact bore to the outer surface — no weak interface inside the wall.
Technical Specifications
| PROPERTY | PU-15 VALUE |
| Material | 100% virgin polyether TPU |
| Wall thickness | 1.5 mm |
| Colour | Transparent (clear) |
| Abrasion (DIN) | 39.0 mg |
| Tensile strength | 40 MPa |
| Elongation at break | ~600% |
| Temp range | −20 to +110 °C |
| Surface resistivity | >10¹² Ω (standard); <10⁹ Ω (anti-static option) |
| Pressure rating | +0.70 bar / −120 mbar |
| Seam | Hot-melt bonded, smooth |
| Installation | Tool-free snap-in, <30 sec per end |
| Food contact | FDA 21 CFR 177.2600 (Report TQT4821B36E) |
| EU | EC 1935/2004 & EU 10/2011 |
Part Number System
PU15 - D{Ø} - CL{length}
| CODE SEGMENT | MEANING | EXAMPLE |
| PU15 | 1.5 mm polyether TPU | PU15 |
| D{Ø} | Sleeve diameter in mm | 150 |
| CL{length} | Installed length in mm | 200 |
Example: PU15-150-200 = Ø150 mm × 200 mm, 1.5 mm wall.
Standard sizes: Ø102–804 mm × 100–1000 mm. Full matrix in the Standard Size Database.
When to Choose PU-15
| YOUR SITUATION | CHOOSE |
| Abrasive powder (minerals, metals, ceramics, resins) | PU-15 |
| High-velocity pneumatic conveying | PU-15 |
| Frequent sleeve replacement due to wear-through | PU-15 |
| Fine, light, non-abrasive powder | PU-10 standard |
| Abrasive + combustible dust | PU-10-AS anti-static grade — contact engineering |
Frequently Asked Questions
Q1: Is the PU-15 a different material from PU-10?
A: No — both are 100% virgin polyether TPU. The PU-15 difference is the 1.5 mm wall thickness, which provides a larger wear budget for abrasive powders.
Q2: Does the thicker wall reduce flexibility?
A: The PU-15 retains ~600% elongation at break, so it still flexes to absorb vibration and offset. The extra thickness primarily increases wear life, not stiffness.
Q3: What pressure can the PU-15 handle?
A: +0.70 bar positive pressure and −120 mbar vacuum (dependent on diameter and temperature).
Q4: Is the PU-15 food-contact compliant?
A: Yes. It is FDA 21 CFR 177.2600 compliant (Report TQT4821B36E) and formulated in accordance with EC 1935/2004 and EU 10/2011.
Q5: Does the PU-15 put metal in the product stream?
A: The snap-in retention band is hot-melt bonded within the sleeve wall and is not exposed in the product bore. The bore stays smooth and flush.
Q6: How do I size the PU-15?
A: Measure spigot seating OD, installation gap, dynamic stroke, media, temperature, and pressure. See the How to Measure & Size guide.
Q7: What is a 1.5 mm polyurethane flexible connector used for?
A: The PU-15 is used in powder handling applications that involve abrasive media. The additional wall thickness provides a larger wear reserve than a standard 1.0 mm sleeve, making it suitable when connectors are replaced due to wear-through. It retains the same polyether TPU material and food-contact compliance as the PU-10.
Q8: What is the difference between a 1.0 mm and 1.5 mm flexible connector?
A: The main difference is wall thickness: 1.0 mm (PU-10) vs. 1.5 mm (PU-15). Both are 100% virgin polyether TPU. The thicker 1.5 mm wall provides more wear material, which can be beneficial for abrasive powders, while the 1.0 mm is suited to light, fine, non-abrasive powders.
Need a 1.5 mm wall for abrasive powder?
Contact our engineering team for sizing, sample availability, or a quote. Send a photo of your current equipment setup and your parameters to amin@soshh.com. Our technical engineering team will evaluate your application and provide a tailored, long-lasting solution within 24 hours.
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