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Personal protective solutions from head-to-toe
Our job is to protect women and men at work. To this effort, we design and manufacture complete personal and collective protection solutions for professionals worldwide.
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We protect men and women at work by designing and manufacturing complete collective protection solutions for professionals around the world.
Our job is to protect women and men at work. To this effort, we design and manufacture complete personal and collective protection solutions for professionals worldwide.
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For more than 45 years, Delta Plus designs, standardises, manufactures, and distributes globally a full set of solutions in personal and collective protective equipment (PPE) to protect professional at work.

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Specifications of level numbers and requirements relating to the transmittance of filters to protect operators for welding and related techniques. Specification of requirements for welding filters with double number of levels.
Applies to all types of individual protection of the eye which protects from hazards likely to damage the eye, except for nuclear radiation, x-rays, laser emissions and infrared emitted by low-temperature sources. Does not apply to eye protection for which separate standards exist (anti-laser eye protection, sunglasses for general use,…).
Specification of the requirements for automatic welding filters, i.e. welding screens with automatic variation of the transmission factor. These screens are intended to protect operators during welding and related techniques..
Specifications of level numbers and of requirements relating to the transmittance of the filters for protection against ultraviolet radiation.
Specification of level numbers and requirements relating to the transmittance of filters for protection against solar radiation, industrial use.
Material specifications, design, performance and test methods for eye and face mesh type protective, for professional use.
Specifications for the safety requirements for eye and face protection equipment for welding and related techniques (filters frames/ media).
MARKING
| SYMBOL MEANING – EN166: | EN ISO 16321-1: Symbol Meanings |
|---|---|
| 1: Optical class allowing permanent wear of the spectacles | 1: Optical class allowing for permanent wear. |
| S: Increased robustness: steel ball of 22 mm diameter at 5.1 m/s. (18.36 km/h) | |
| F: Low energy impact: steel ball of 6 mm diameter at 45 m/s. (162 km/h) | C: Medium-energy impact (45 m/s). |
| D: Medium-high impact (goggles) (80 m/s). | |
| B: Medium energy impact: steel ball of 6 mm diameter at 120 m/s. (432 km/h) | E: High-energy impact (visors and face shields) (120 m/s). |
| A: High energy impact: steel ball of 6 mm diameter at 190 m/s. (684 km/h) | |
| HM: High-mass impact (optional). | |
| 3: Liquid resistance (droplets or splashes). | |
| 4: Large dust particles resistance (size of > 5 μm). | 4: Resistance to large dust particles (size > 5 microns). |
| 5: Gas and fine dust particles resistance (size < 5 μm). | 5: Resistance to gases and fine dust particles (size < 5 microns). |
| 6: Resistance to liquid jets. | |
| 7: Resistance to radiant heat. | |
| 8: Short circuit electric arc resistance. | |
| 9: Resistance to splashes of molten metal and penetration of hot solids. | 9: Resistance to molten metal splashes and hot solids. |
| T: (F - B - A) Mechanical resistance to extreme temperatures -5°C/+55°C | T: (C-E-D-HM) Mechanical resistance at extreme temperatures (-5°C to +55°C). |
| N: Resistance to fogging of lenses. | N: Resistance to fogging of the oculars. |
| K: Resistance to surface damage by fine particles (anti-scratch). | K: Resistance to surface deterioration by fine particles (anti-scratch). |
> Read our article Eye protection: a new, more stringent international standard, EN ISO 16321