Watson-Marlow 520DUN User Manual page 12

Watson-Marlow 520DuN IP66/NEMA 4X User Manual
IP (Ingress Protection) and NEMA definitions
1st Digit
Protected against
ingress of solid objects
with a diameter of
more than 2.5mm.
3
Tools, wires etc with a
thickness of more than
2.5mm are prevented
from approach
Protected against
harmful dust deposits.
Ingress of dust is not
totally prevented but
the dust must not
enter in sufficient
5
quantity to interfere
with satisfactory
operation of the
equipment. Complete
protection against
contact
Protection against
ingress of dust (dust-
6 tight). Complete
protection against
contact
* 520N cased pumps are rated to NEMA 4X (indoor use) only.
IP
2nd Digit
Protection against
dripping water falling
1 vertically. No harmful
effect must be
produced
Protection against
water projected from a
nozzle against the
equipment (enclosure)
5
from any direction.
There must be no
harmful effect (water
jet)
Protection against
heavy seas or powerful
water jets. Water must
6 not enter the
equipment (enclosure)
in harmful quantities
(splashing over)
NEMA
Indoor use to provide a
degree of protection
2
against limited amounts
of falling water and dirt
Indoor use to provide a
degree of protection
12 against dust, falling dirt
and dripping, non-
corrosive liquids
Indoor use to provide a
degree of protection
13 against dust and
spraying water, oil and
non-corrosive coolants
Indoor or outdoor* use
to provide a degree of
protection against
splashing water, wind-
blown dust and rain,
4X hose-directed water;
undamaged by the
formation of ice on the
enclosure. (Resist
corrosion: 200-hour salt
spray)
12