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A.0500.551 – IM-TGMAG/02.00 EN (02/2008)
3.5 Main characteristics
The pump size is designated by the displacement volume of 100 revolutions expressed in litres
(or dm
3
) but rounded followed by the nominal port diameter expressed in millimetres.
Legend
d : port diameter (inlet and outlet port)
B : width of idler gear and length of rotor teeth
D : peripheral diameter of rotor (outside diameter)
Vs-100 : displaced volume pro 100 revolutions
n.max : maximum allowable shaft speed in rpm
n.mot : normal speed of direct drive electric motor (at 50Hz frequency)
Q.th : theoretical capacity without slip at differential pressure = 0 bar
v.u : peripheral velocity of rotor
v.i : velocity of liquid in the ports at Qth (inlet and outlet port)
∆p : maximum working pressure = differential pressure
p test : hydrostatic test pressure
Maximum viscosity
Maximum viscosity = 10 000 mPas
Remark:
Figures are for Newtonian liquids at operating temperature
3.6 Pressure
For performance on pressure three kinds of pressures must be considered i.e.
Differential pressure or working pressure (p) is the pressure on which the pump normally
operates. The maximum differential pressure of all TopGear MAG pumps is 16 bar.
Maximum allowable working pressure or design pressure (p.m.) is the pressure on which the
pump casing is designed. It represents the maximum allowable pressure difference between
internal pressure in the pump casing and the atmosphere. On TopGear MAG pumps the design is 16
bar for cast iron pump casings and 20 bar for stainless steel pump casings
Hydrostatic test pressure is the pressure on which the pump casing including separation can of
the magnetic coupling is tested. For TopGear MAG pumps the hydrostatic test pressure is 24 bar.
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-weighted 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.
Pump size
TG MAG
d
(mm)
B
(mm)
D
(mm)
Vs-100
(dm
3
)
n.max
(min
-1
)
n.mot
(min
-1
)
Q.th
(l/s)
Q.th
(m
3
/h)
v.u
(m/s)
v.i
(m/s)
∆p
(bar)
p.test
(bar)
15-50
50 40 100 14.5 1500 3.6 13.1 7.9 1.8 16 24
1450 3.5 12.6 7.6 1.8
23-65
65 47 115 22.5 1500 5.6 20.3 9.0 1.7 16 24
1450 5.4 19.6 8.7 1.7
58-80
80 60 160 55.8 1050 9.8 35.2 8.8 2.0 16 24
960 8.9 32.1 8.0 1.8
86-100 100 75 175 84.2 960 960 13.5 48.5 8.8 1.7 16 24
185-125
125 100 224 183.7 750 23 82.7 8.8 1.9 16 24
725 22.2 79.9 8.5 1.8