Sellstrom DP4 - Understanding Markings and Codes; Protection Level Codes; Ocular Markings Explained; Mechanical Strength Codes

ENGLISH
PROTECTION LEVEL AND APPLIANCES - MEANING OF THE CODE MARKINGS:
OCULAR MARKINGS:
Protection class * (lters only) 2C-1,2
Manufacturer’s identication SM
Optical class 2
Mechanical strength... (optional B
Metal, liquids and hot solids resistance symbol.
(if applicable) 8
Fog resistance symbol ---
(if applicable)
Abrasion resistance symbol K
(if applicable) ---
* Protection class = code number followed by the ocular protection scale number separated by a dash.
DEFINITION, FRAME MARKING AND OCULARS
CODE DESIGNATION DESCRIPTION
NONE Basic use
Non-specic mechanical hazards and hazards
derived from ultraviolet, visible, infrared or
solar radiation.
3 Liquids
Droplets or splashes
4 Coarse dust particles
Coarse dust particles( >5 microns)
5 Gas and ne dust particles.
Gas, vapors, vaporized droplets, smoke and
<5 microns dust particles.
8 Short Circuit Electric Arc
Electric arc due to short circuit in the electrical
equipment
9 Molten metals and hot solids
Molten metal splashes and hot solids penetration
S,F,B,A Mechanical protection level
Level of protection against mechanical impact;
S= increased robustness, F= low energy impact-45m/s,
B=medium energy impact – 120 m/s,
A=High Energy Impact – 190 m/s.
T Mechanical protection level at
extremes temperatures
Mechanical resistance of the oculars at
extreme temperatures (+55 °C, -5°C); i.e. FT, BT, AT
Mechanical Strength
CODE DESCRIPTION
None Minimum robustness (oculars only)
S Increased robustness
F High speed low energy
B High speed medium energy
A High speed high energy
INST-DP4 rev. 7
Product that works.