Product Introduction; Applications; Technical Data; Identification - Grundfos SRP Instrucciones De Instalación Y Funcionamiento

2. Product introduction

Grundfos recirculation pumps type SRP are designed for transfer
of liquids of low to medium viscosity from one tank to another.
22 8 4 7
Fig. 1 SRP pump
Pos. Description
4 Pump rack
7 Motor
8 Gearbox
10 Propeller
22 Hydraulic inlet

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.
Liquid temperature
pH value
Maximum sludge index
Maximum dynamic viscosity
Maximum density
Chloride content
(for stainless steel AISI type 304)
* With a maximum dry solid content of 1.5 %.

2.2 Technical data

Voltage tolerance
Enclosure class
Insulation class
Maximum installation depth
Maximum number of starts per hour
Standard length of power cable
Standard cable length on all winches
6
10
41 °F to 104 °F
(5 °C to 40 °C)
4 to 10
14.98 gallon/lb
(125 ml/g)
500 CSt (mPas)
8.846 lb/gallon
3
(1060 kg/m )
≤ 1.67 x 10
-3
lb/gallon
(200 mg/l)
- 10 %/+ 10 % of
nameplate value
IP68
F
66 ft (20 m) below liquid
level
20
30, 50 or 80 ft
(10, 15 or 25 m)
30, 50 or 80 ft
(10, 15 or 25 m)

3. Identification

3.1 Type key

Example SRP. 11. 12. 524. 08.
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
-1
524: 524 min
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
6. 0P