Product Manual

SP operating conditions
SQ, SQE, CU 331, and SP
15
74
15. SP operating conditions
Operating conditions
Flow rate, Q: 0.44 - 1475 gpm (0.1 - 335 m
3
/h).
Head, H: Maximum 2657 ft (810 m).
Maximum liquid temperature
Note: For MMS 6, 50 Hp; MMS 8000, 150 Hp; the maximum liquid
temperature is 9 °F (5 °C) lower than the values stated in the
table. For MMS 10000, 250 Hp, the temperature is 18 °F (10 °C)
lower.
Operating pressure
Curve conditions
The conditions below apply to the curves in section
17. SP curve charts and technical data:
General
• Curve tolerances according to ISO 9906, Annex A.
• The performance curves show pump performance
at actual speed, cf. standard motor range.
The speeds of the motors are approximately these:
4" motors: n = 3470 rpm
6" motors: n = 3460 rpm
8" motors: n = 3480 rpm
10" motors: n = 3520 rpm
• The measurements were made with airless water at
a temperature of 68 °F (20 °C). The curves apply to
a kinematic viscosity of 1 mm
2
/s (1 cSt). When
pumping liquids with a density higher than that of
water, use motors with correspondingly higher
outputs.
•The bold curves indicate the recommended
performance range.
• The performance curves are inclusive of possible
losses such as check valve loss.
• Q/H: The curves are inclusive of valve and inlet
losses at the actual speed.
Operation without check valve will increase the
actual head at rated performance by 1.6 ft to 3.3 ft
(0.5 m to 1.0 m).
• NPSH: The curve is inclusive of pressure loss in the
suction interconnector and shows required inlet
pressure.
• Power curve: P
2
shows pump power input [Hp] at
the actual speed of each individual pump size.
• Efficiency curve: Eta shows pump stage efficiency.
If Eta for the actual pump size is needed, please
consult Grundfos Product Center.
Motor
Installation
Flow velocity
past motor
Vertical
[°F (°C)]
Horizontal
[°F (°C)]
Grundfos MS 4" and MS
6000C T-40 versions
0.49 fps
(0.15 m/s)
104 (40) 104 (40)
Grundfos 4" MS industry
versions
0.49 fps
(0.15 m/s)
140 (60) 140 (60)
Grundfos MS 6000C
T60-versions
3.28 fps
(1.0 m/s)
140 (60) 140 (60)
Grundfos MMS
6" to 12" rewindable with
PVC in the windings
0.49 fps
(0.15 m/s)
77 (25) 77 (25)
1.64 fps
(0.50 m/s)
86 (30) 86 (30)
Grundfos MMS 6" to 12"
rewindable with PE/PA in
the windings
0.49 fps
(0.15 m/s)
104 (40) 104 (40)
1.64 fps
(0.50 m/s)
113 (45) 113 (45)
Motor Maximum operating pressure
Grundfos MS 4" and 6"
870 psi (6 Mpa) (60 bar)
Grundfos MMS 6" to 10"
rewindable