Eng
lish (US)
6
2. Product introduction
Grundfos recirculation pumps type SRP are designed for transfer
of liquids of low to medium viscosity from one tank to another.
Fig. 1
SRP pump
2.1 Applications
Grundfos SRP recirculation pumps are used for the pumping of
return sludge in sewage treatment plants and for other pump
applications involving a high flow rate and low head. The pumps
are designed for continuous operation fully submerged
(S1 operation).
In order not to overload the pumps and expose them to corrosion,
the following limitations must be observed.
* With a maximum dry solid content of 1.5 %.
2.2 Technical data
3. Identification
3.1 Type key
TM
03 03
74 33
08
Pos.
Description
4
Pump rack
7
Motor
8
Gearbox
10
Propeller
22
Hydraulic inlet
Liquid temperature
41 °F to 104 °F
(5 °C to 40 °C)
pH value
4 to 10
Maximum sludge index
14.98 gallon/lb
(125 ml/g)
Maximum dynamic viscosity
500 CSt (mPas)
Maximum density
8.846 lb/gallon
(1060 kg/m
3
)
Chloride content
≤
1.67 x 10
-3
lb/gallon
(200 mg/l)
(for stainless steel AISI type 304)
Voltage tolerance
- 10
%/
+
10
% of
nameplate value
Enclosure class
IP68
Insulation class
F
Maximum installation depth
66 ft (20 m) below liquid
level
Maximum number of starts per hour
20
Standard length of power cable
30, 50 or 80 ft
(10, 15 or 25 m)
Standard cable length on all winches
30, 50 or 80 ft
(10, 15 or 25 m)
22
4
7
10
8
Example SRP. 11. 12. 524. 08.
6. 0P
Type range
SRP: Submersible recirculation pump
Motor output power, P2
P2: Code from type designation/10 [hp]
11 1.1 hp
Propeller diameter
12: 12 inches
Propeller speed
524: 524 min
-1
Propeller blade pitch
08: 8 °
Explosion protection
[-]: Non-explosion-proof
Frequency
5:
50 Hz
Voltage and starting method
0P: 440-480 V, DOL
1P: 440-480 V, Y/D
0Z: Special, DOL
1Z: Special, Y/D
Generation
[-]: First generation
A: Second generation
B: Third generation
