The Guardian air duct is the connector on the helmet into which you plug the hose from the blower unit. It fits the Guardian 50M Air, 50FM Air, 62 Air, 62F Air and Big Vision Air helmets. These helmets are certified with Evolution Air (TH3 P R SL), Guardian Air (TH3) and Supplied Air (4A).
Technical specifications
| Catalogue number | 87143 |
|---|---|
| Brand | Böhler Welding |
| Compatible with | Guardian 50M/50FM/62/62F Air, Big Vision Air |
| Type | air duct on the helmet |
| Connection | bayonet connector |
| Unit | Evolution Air, Guardian Air, Supplied Air |
| Pack quantity | 1 pc |
Who it is for
For users of Guardian Air helmets and Big Vision Air with a cracked or worn air duct. The air duct belongs to the helmet, so it fits when working with Evolution Air, Guardian Air and Supplied Air.
Key features
- Hose connector on the helmet shell.
- Bayonet connector: push the hose in and turn until the pins clip into place.
- For Guardian 50M Air, 50FM Air, 62 Air, 62F Air and Big Vision Air.
- Different from the Evolution Vision Air duct (87441).
Connecting the hose to the Guardian air duct
To connect the hose, align the pins of the bayonet connector with the slots in the air duct, push in to the bottom and turn gently until the pins clip into place. With low airflow, the manual says to check the hose and air duct for blockage and clear it. Before work, make sure the hose is well connected to the helmet.
Compatible with
The helmets prepared for air and the Air Kits with these helmets:
- Böhler Welding Guardian 62 Air welding helmet for PAPR powered air systems
- Böhler Welding Guardian 62F Air flip-up welding helmet for PAPR powered air systems
- Böhler Welding Guardian 50M Air welding helmet for PAPR powered air systems
- Böhler Welding Guardian 50FM Air flip-up welding helmet for PAPR powered air systems
- Böhler Welding Big Vision Air grinding visor for PAPR powered air systems
- Böhler Welding Guardian 62 Air Kit, welding helmet with Evolution Air PAPR
- Böhler Welding Guardian 62F Air Kit, flip-up welding helmet with Evolution Air PAPR
- Böhler Welding Guardian 50M Air Kit, welding helmet with Guardian Air PAPR
- Böhler Welding Guardian 50FM Air Kit, flip-up welding helmet with Guardian Air PAPR
- Böhler Welding Big Vision Air Kit Guardian Air, grinding visor with Guardian Air PAPR
- Böhler Welding Big Vision Air Kit Evolution Air, grinding visor with Evolution Air PAPR
The helmets work with these units: Böhler Welding Evolution Air PAPR blower unit, complete kit with filters, Böhler Welding Guardian Air PAPR blower unit, complete kit with filter, Böhler Welding Supplied Air compressed air regulator for air-fed helmets, complete kit.
Consumables and spare parts
- Böhler Welding face seal Guardian 50M Air, 50FM Air, 62 Air, 62F Air, Big Vision Air
- Böhler Welding standard air hose 100 cm Evolution Air, Guardian Air, Supplied Air
- Böhler Welding FLEX flexible air hose up to 180 cm Evolution Air, Guardian Air
- Böhler Welding air hose O-ring PAPR (20 pcs)
All PAPR parts: Filters and powered air parts.
Documents
- Big Vision and Big Vision Air instruction manual (PDF, multilingual)
- Guardian 50M/50FM Air Kit fact sheet with Guardian Air spare parts (PDF, English)
- Big Vision and Big Vision Air info sheet (PDF, English)
- PPE & accessories catalogue 2023/24 (PDF, English)
Frequently asked questions
Does it fit Evolution Vision 65F Air?
No. Evolution Vision 65F Air and 65FM Air use the Böhler Welding air duct Evolution Vision 65F Air, 65FM Air.
Does the Supplied Air hose fit too?
Yes. The helmets with this air duct are certified with Supplied Air (class 4A to EN 14594), and the Böhler Welding standard air hose 100 cm Evolution Air, Guardian Air, Supplied Air standard hose is a Supplied Air spare part.
What if the airflow is weak?
The manual says to check the hose and air duct for blockage and inspect seals and connectors; other causes are an undercharged battery and a clogged filter.
