NRWG Multi-Leaf Damper Models JK-180MB / JK-190
Technical
documentation
Capacity and classification |
Construction subject to change
No return possible
Version: 2016-08-02 | Document: 09/53 | Page 3
CAPACITY AND CLASSIFICATION
Summary
The classifications for JK-180MB / JK-190 are highlighted in colour.
Operational safety
Snow load
Low
ambient temperature
Wind load
Resistance to heat
Possible classes according to DIN EN 12101-2
Re A*
SL A*
T A*
WL A*
B A*
Re 50
SL 0
T 0°C
WL 1500
B 300
Re 1000
SL 125
T -5°C
WL 3000
B 600
SL 250
T -15°C
SL 500
T -25°C
SL 1000
*) A is used as wild card for a certain value specified by the manufacturer
Aerodynamically active opening area
Geometric opening area multiplied by the flow rate coeffi-
cient
Flow rate coefficient determined experimentally either di-
rectly or indirectly from the test results of NRWGs of dif-
ferent sizes or from scaled-down models
Operational safety
Proof that the NRWG opens and closes during the number
of specified cycles
The designations A, 50 and 1000 indicate how often the
NRWG was opened in the initial test without external load.
The functional position must be reached within 60 °sec.
When used additionally for ventilation purposes, the func-
tional test must not be carried until the NRWG has been
opened 10,000 times in the ventilation position.
Snow load
Proof that the NRWG opens and remains open under wind
and snow loads
Indicates the test snow load in Pa (N/m²) applied when the
opening process is tested.
When the inclination of the recommended minimum in-
stallation angle exceeds 45°, the NRWG may be assigned
to class SL 0.
Low ambient temperature
Proof of reliable functioning of the opening mechanism of
the NRWG at lower temperatures
Indicates the temperature in °C at which the NRWG will be
tested
NRWGs are suitable for use in buildings in which the tem-
peratures exceed 0 °C.
For T(00), no low temperature test is required.
Wind load
Proof that the NRWG when exposed to wind load remains
intact, remains closed and can be opened to assume its
functional position after the exposure to the wind load is
over.
Indicates the test load (wind load) in Pa applied during the
test
When exposed to the relevant wind load, the NRWG must
not open and not exhibit any permanent deformation.
Following the test, it must open within 60 sec. after being
actuated.
Resistance to heat
Proof that the installed NRWG when exposed to fire will
open within 60 sec. to assume its functional position and
remain there.
Indicates the temperature in °C at which the NRWG will be
tested
