Flexible Air Line Tube for MZB-550H Compressor — 280 mm, Ø12.5 mm
This flexible air-line tube is intended to connect the compressor pump head to the air receiver.
1. Purpose and operating principle
Its flexible construction helps accommodate vibration generated by the piston assembly and reduces mechanical stress on the connections. Before ordering, compare the length and connector dimensions with the part currently fitted to the compressor.
2. Technical specifications
| Parameter | Value stated on the product page |
|---|---|
| Type | Flexible air-line tube with braided outer layer |
| Length | 280 mm |
| Connector/thread dimension | Ø12.5 mm — confirm the exact thread type before ordering |
| Outside diameter | Approximately 15–17 mm, including braid |
| Stated construction | Metal braid and inner hose |
| Application | MZB-550H compressor and compatible models, subject to dimensional verification |
| Stated working pressure | Up to 8 bar |
| Stated country of origin | China |
Important: The available product description does not specify the inner-hose material, exact thread standard, dimensions of both end fittings, or supporting pressure documentation. Confirm these details with the supplier before use.
3. Design features
- Nominal length: 280 mm.
- Outer metal braid, as stated in the product description.
- Flexible construction intended for installation between the compressor head and receiver.
- Reference model: MZB-550H. This identifies the application stated on the product page; it does not guarantee compatibility with every variant.
4. Installation recommendations
- Disconnect the compressor from the electrical supply and fully depressurise the receiver.
- Compare the replacement with the removed part: length, fitting shape, diameter and thread type.
- Do not force the thread or tighten fittings at an angle.
- Route the tube without twisting, tight bends, contact with hot surfaces or sharp edges.
- Do not apply PTFE tape until the thread type and sealing method have been confirmed. Some fittings seal with a gasket rather than on the thread.
- After installation, restart the compressor according to the manufacturer’s instructions and check for leaks at operating pressure.
5. Equivalents and comparison
No verified cross-reference part numbers from SMC, Festo, Camozzi, Parker Legris, Metal Work or EMC are available. Do not select a replacement based on appearance alone.
To assess an alternative, check all of the following: 280 mm length, type and size of both fittings, sealing method, rated pressure, temperature resistance and suitability for compressor vibration.
6. Common mistakes
- Choosing the part by length alone without checking the fittings.
- Confusing the 12.5 mm dimension with a nominal thread size.
- Installing the tube twisted or under tension.
- Using a part with an insufficient pressure rating.
- Applying PTFE tape to a joint designed to seal with a gasket.
- Failing to check for leaks after installation.
7. Applications
This part is intended for the air-line system of a compressor where the dimensions and fittings match. Automotive workshops, service centres and industrial facilities may require this part only when the specifications match. Do not assume that all compressors with similar model names are compatible.
8. Expert opinion
Vitali Boluchevski, Lead Engineer, Acvatron SRL, 18 years of experience
When selecting a flexible compressor tube, check more than its length: verify the fitting type, sealing method and permitted working pressure. An unsuitable part can leak or transfer mechanical stress to the connections. If you are unsure about the dimensions, send the Acvatron team photos of the old part and measurements of its fittings.
9. Frequently asked questions
Is this tube compatible with every MZB-550H compressor?
The product page lists it for the MZB-550H and compatible models. Confirm the exact fitting type and length on your compressor before ordering.
How long is the tube?
The product page specifies a length of 280 mm.
What does Ø12.5 mm mean?
The product page gives this dimension for the fitting/thread, but it does not clarify the thread standard or type. Check the actual size and thread profile before installation.
How should I check for leaks after installation?
After correct installation and safe restart, inspect the joints using an appropriate leak-detection method. Do not search for leaks with your hand or exceed the rated pressure of any component.
Can I use a tube of a different length?
Only after checking the routing, fittings, pressure rating and temperature rating. A tube that is too short can put the joints under tension; an excessively long tube may kink or touch hot components.
