MTR(E), MTC, MTA - Grundfos

2
MTC
66
MTC operating conditions
Ambient temperature
Maximum ambient temperature +104 °F (+40 °C).
If the ambient temperature exceeds +104 °F (+40 °C)
or if the motor is located 3280 ft (1000 m) above sea
level, the motor output (P 2) must be reduced due to the
low density and consequently low cooling effect of the
air. In such cases, it may be necessary to use a motor
with a higher output.
3280 7382 11483 15584 ft
Fig. 35 Relationship between motor output (P2) and
ambient temperature/altitude
Key
P2
[%]
100
2
90
80
70
60
50
1
60 80 100 120 140 160 180
T [°F]
Pos. Description
1 NEMA Energy Efficient motors
2 NEMA Premium Efficiency motors
Example: From the above figure and key appears that
P 2 must be reduced to 88 % when a pump with a
NEMA Premium Efficiency, ML motor is installed
15584 feet above sea level. At an ambient temperature
of 167 °F, P 2 of an Energy Efficient motor must be
reduced to 74 % of rated output.
Maximum operating pressure
Immersible pump model
Maximum permissible
operating pressure
NPT threads ANSI flange
MTC 2 --> MTC 4 116 psi --
TM03 4272 2006
Sound pressure level
MTR(E), MTC, MTA
All MTC pumps have a sound pressure level below 70
dB(A).
Viscosity
Immersible Pump Model Maximum Kinematic Viscosity
MTC 50 Cst.
For further information about pump performance when
pumping liquids with densities or kinematic viscosities
higher than those of water, see WinCAPS.
WinCAPS is a product selection program offered by
Grundfos, see page 106.