17
TopGear GS-range
15 bar
10 bar
A.0500.501 – IM-TGGS/05.01 EN (03/2013)
3.6 Pressure
Differential pressure or working pressure
(p) is the pressure on which the pump normally
operates. TopGear GS-line has the maximum differential pressure at 10 bar.
The
hydrostatic test pressure is 1.5 times the differential pressure i.e.:
TopGear GS-line has the hydrostatic test pressure at 15 bar.
Following figure gives a graphical presentation of the several kinds of pressures.
3.7 Sound level
3.7.1 Sound level of a pump without drive
Sound pressure level (L
pA
)
The following table gives an overview of the A-weightened sound pressure level, L
pA
emitted by
a pump without drive, measured according to ISO3744 and expressed in decibels dB(A).
The reference sound pressure is 20µPa.
The values depend on the position from where one measures and were therefore measured at the
front of the pump, at distance of 1 meter from the pump cover and were corrected for background
noise and reflections.
The values listed are the highest measured values under following operating conditions.
• working pressure: up to 10 bar.
• pumped medium: water, viscosity = 1 mPa.s
• —% n
max
= — % maximum shaft speed
TG GS Pump size
n
max
(min-1)
Lpa (dB(A))
Ls (dB(A))
25% n
max
50%n
max
75%n
max
100%n
max
2-25
1800
51
62
68
72
9
3-32
1800
53
65
72
76
9
6-40
1800
57
68
76
80
9
15-50
1500
61
72
79
83
9
23-65
1500
63
75
81
85
10
58-80
1050
67
79
85
89
10
86-100
960
69
80
86
90
11
185-125
750
71
82
87
91
11
Sound power level (L
WA
)
The sound power L
W
is the power emitted by the pump as sound waves and is used to compare
sound levels of machines. It is the sound pressure Lp that acts on a surrounding surface at distance
of 1 meter.
L
WA
= L
pA
+ Ls
The A-weightened sound power level L
WA
is also expressed in decibels dB(A).
The reference sound power is 1 pW (= 10
-12
W). L
S
is the logarithm of the surrounding surface at
distance of 1 metre from the pump, expressed in dB(A) and is listed in the last column of above
table.
Hydrost
atic test pressure
Differential and
working pressure
