High-temperature · up to +300 °C
METAL HOSE ALU 377 - ALUFLEX
Self-locking aluminium hose in highly flexible design, heat-resistant up to +300 °C. Designed for air conditioning on vessels and extraction hoods. Flame-retardant construction makes the hose suitable in environments combining fire resistance with short, vibration-mounted installation. Highly flexible and compressible 3:1.
- +300 °C heat-resistant
- Flame-retardant ALU
- Highly flexible + compressible 3:1
- Gas (air)
- Self-locking construction
- Cut to length
Why this hose?
METAL HOSE ALU 377 — ALUFLEX is a specialty hose for marine air conditioning and extraction hoods. The self-locking aluminium fold construction makes the hose extremely flexible (compressible 3:1) and at the same time flame-retardant — a combination that is critical on vessels where fire resistance is a formal requirement.
The hose tolerates up to +300 °C, covering most air conditioning applications and industrial hoods with hot extraction.
Where it is used
In practice ALUFLEX 377 is seen on marine air conditioning systems, industrial hoods and short vibration-mounted ventilation sections.
The formal product name is METAL HOSE ALU 377 - ALUFLEX. In daily use: "ALUFLEX" or "alu hood hose".
Technical specifications
Specifications are current as of 15 April 2026 and refer to 20 °C unless otherwise stated.
| Material | Aluminium |
|---|---|
| Colour | Silver |
| Wall construction | Self-locking aluminium fold construction |
| Temperature range | Up to +300 °C |
| Compressibility | 3:1 |
| Flame retardancy | Yes |
| Maximum H₂O pressure | 300 mmH₂O |
| Manufacturer SKU (model group) | 3771000 |
Dimensions and ordering
The table shows the main variants from the manufacturer's factsheet. Fields without a value (—) are not specified. Diameters, pressure values and bend radii are normative; weights and roll lengths are typical production values.
| Inner Ø |
Bend radius |
Max. length |
Weight |
Article no. |
|---|---|---|---|---|
| 75 | 38 | 3 | 0.09 | 37700751000 |
| 80 | 40 | 3 | 0.09 | 37700801000 |
| 90 | 45 | 3 | 0.1 | 37700901000 |
| 100 | 50 | 3 | 0.11 | 37701001000 |
| 110 | 55 | 3 | 0.12 | 37701101000 |
| 120 | 60 | 3 | 0.13 | 37701201000 |
| 125 | 63 | 3 | 0.14 | 37701251000 |
| 140 | 70 | 3 | 0.16 | 37701401000 |
| 150 | 75 | 3 | 0.17 | 37701501000 |
| 160 | 80 | 3 | 0.18 | 37701601000 |
| 180 | 90 | 3 | 0.2 | 37701801000 |
| 200 | 100 | 3 | 0.22 | 37702001000 |
| 250 | 125 | 3 | 0.27 | 37702501000 |
| 280 | 140 | 3 | 0.31 | 37702801000 |
| 300 | 150 | 3 | 0.33 | 37703001000 |
| 315 | 158 | 3 | 0.34 | 37703151000 |
| 350 | 175 | 3 | 0.38 | 37703501000 |
| 400 | 200 | 3 | 0.44 | 37704001000 |
Overpressure and underpressure values are recommended operating limits; the product can be subjected to higher loads on request. Bend radius is measured along the inside of the hose bend.
Standards and compliance
The hose is certified or documented to the following standards:
- REACH (EC 1907/2006) and RoHS 2011/65/EU. The manufacturer holds declarations of compliance.
- Flame-retardant construction. Specifically designed for marine and industrial applications where fire resistance is a requirement.
Documentation and downloads
Additional documents about this hose, its compliance and installation. Click to download as PDF in a new tab.
Help with material selection
If you are choosing a hose and are uncertain about the right resistance level or zone classification, these two articles are a good place to start:
Industries that use it
The hose is used for AC and hood applications:
Shipbuilding, HVAC and food industries use the hose for air conditioning, extraction hoods and short ventilation connections where flame retardancy is a requirement.
Custom lengths and assemblies
The hose can be cut to length and assembled with couplings, cuffs and threaded fittings through Particulair's custom hose assemblies.
We offer guidance on material choice, coupling system and grounding, so the hose fits correctly into the overall system. If there is any doubt about zone classification or resistance requirements, a short conversation before ordering is well worth the time.
Frequently asked questions
What does "self-locking" mean?
The aluminium fold construction mechanically locks itself when joined — the hose does not need separate coupling elements to hold its shape. That gives fast installation and high flexibility on short sections.
What is the production length?
3 m in all dimensions. The hose is primarily intended for short connections — not long extraction systems.
Can the hose be supplied cut to length with couplings?
Yes. METAL HOSE ALU 377 - ALUFLEX can be cut to length and assembled with couplings, cuffs and threaded fittings through Particulair's custom hose assemblies. We provide guidance on coupling system and sealing so the hose fits correctly into the overall installation.
How do I order the hose, and where do you deliver?
The hose is ordered through Particulair (Karlslunde, Denmark). We deliver to Denmark, the EU and selected third countries such as Norway and Switzerland. Standard dimensions can typically be delivered in 1-2 weeks; custom assemblies and larger volumes require slightly longer lead time.
What is the hose's expected service life?
Service life depends on operating conditions: loading, temperature, chemical exposure, UV and mechanical movement. In standard industrial use, expected life is 3-7 years. Aggressive conditions (high temperatures, continuous flexing, chemical vapours) reduce service life. We recommend regular visual inspection for cracks, deformation or discolouration.
How is the hose best stored before use?
Store the hose dry, at room temperature (15-25 °C) and out of direct sunlight. Avoid contact with ozone-generating equipment (welding equipment, engines). If stored on a reel, the bend must be larger than the specified minimum radius to avoid permanent deformation. Proper storage significantly extends shelf life.
What is the minimum bend radius, and what happens if I go below it?
Minimum bend radius is the smallest radius the hose can be bent to without permanent deformation or internal damage. The table above shows specific values for each dimension. Bending the hose below this limit can collapse the wall, kink the spiral or damage the inner coating. The result is reduced flow, increased pressure loss and shorter service life. Always use bend radius as a design constraint in installation.
Does the hose need to be grounded to function as an ESD component?
Yes, proper grounding is a prerequisite. The antistatic or conductive wall only dissipates static electricity if the hose is connected to ground at both ends — typically via grounded couplings on machine and tank. Without grounding, the electrical property has no practical effect and the ATEX approval is not valid in practice. We always recommend measuring loop resistance after installation.