118 / 416
AXIAL FLOW FANS GENERAL INFORMATION
AXIAL FLOW FANS PERFORMANCE DATA
C-2
© FANTECH
2016
INTRODUCTION
This section of the catalogue details the performances of a wide range of axial flow fan
types as follows:-
The above fans range in diameter from 315mm to 2000mm.
The curves shown on pages C-12 to C-24 show a range of performances for the
AP series of direct-driven axial flow fans in Type D Installation (see below). The other
fan types listed above incorporate casings or housings that impact on their
performance result. The Fans by Fantech Product Selection Program will produce
performance curves for these other fan types that have automatically taken these
losses into account.
TEST STANDARDS
The International Standards Organisation (ISO) achieved a standardised fan test code
with the publication of ISO5801:1997. This Standard replaces BS848:Part 1, 1980 upon
which it was based.
Fan performances for the Elta 1000 Series diameter have been aerodynamically tested
to BS848:Part 1, 1980 and the Elta 1400 and 2000 Series to ISO5801:1997. All three
series have been tested to BS848:Part 2, 1985 for sound performance.
The main difference between the above Standards and those they replaced, is the
installation Types A, B, C and D such that, if a fan unit is designed for use in any one of
these arrangements, the variation in performance should be established and shown.
Both BS848:Part 1, 1980 and ISO5801:1997 reflect the latest understanding of
measuring techniques and accuracy in fan performance testing.
If the same fans were tested to pre-1980 air flow and noise Standards and then to the
latest Standards, different performances would be obtained. The results from the later
Standards give differences of as much as:-
O
-5% in volume
O
-10% in pressure
O
-5% in efficiency
O
+2 to 6dB in noise
These differences should be borne in mind when making comparisons of fans tested to
the different Standards, as they are the result of the test method and not the product.
V
V
V
V
TYPE A
Free inlet
Free outlet
TYPE C
Ducted inlet
Free outlet
TYPE B
Free inlet
Ducted outlet
TYPE D
Ducted inlet
Ducted outlet
Duct Mounted Axial Fans
O
AP Series - direct driven
O
APS Series - direct driven, smoke spill
O
APB Series - belt-driven
O
BFA Series - bifurcated, direct driven
Wall Mounted Fans
O
SQ Series - square plate, direct driven
Axial Roof Units
O
RDE/RDLE Series - downflow cowl,
exhaust
O
RDS Series - downflow cowl, supply
O
RVE/RVLE Series - vertical discharge
O
RSS/RSSL Series - vertical discharge,
smoke spill
O
HC Series - high capacity, vertical
discharge
O
SS Series - smoke spill
C