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English (GB) Installation and operating instructions
Original installation and operating instructions.
CONTENTS
1.
2.
2.1
2.2
2.3
3.
3.1
3.2
3.3
4.
4.1
4.2
5.
5.1
5.2
5.3
6.
6.1
6.2
6.3
7.
7.1
7.2
7.3
7.4
7.5
7.6
7.7
8.
9.
9.1
9.2
9.3
Oil
9.4
10.
11.
12.
Warning
Prior to installation, read these installation and
operating instructions. Installation and operation
must comply with local regulations and accepted
codes of good practice.
Warning
The use of this product requires experience with
and knowledge of the product.
Persons with reduced physical, sensory or
mental capabilities must not use this product,
unless they are under supervision or have been
instructed in the use of the product by a person
responsible for their safety.
Children must not use or play with this product.
1. Symbols used in this booklet
Warning
Page
If these safety instructions are not observed, it
7
may result in personal injury!
7
7
Warning
8
If these instructions are not observed, it may lead
8
to electric shock with consequent risk of serious
personal injury or death.
8
8
Warning
8
These instructions must be observed for
9
explosion-proof pumps. It is advisable also to
9
follow these instructions for standard pumps.
9
9
If these safety instructions are not observed, it
Caution
10
may result in malfunction or damage to the
10
equipment!
10
10
Notes or instructions that make the job easier
Note
and ensure safe operation.
10
10
2. General description
11
11
Grundfos recirculation pumps type SRP are designed for transfer
of liquids of low to medium viscosity from one tank to another.
12
13
13
14
14
14
14
15
15
16
16
22
8
17
SRP pump
Fig. 1
18
18
Pos.
Description
19
20
4
Pump rack
20
7
Motor
20
8
Gearbox
20
20
10
Impeller
20
22
Hydraulic inlet
20
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 (S1).
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
*
With a maximum dry solid content of 1.5 %.
4
7
10
5 to 40 °C
4-10
125 ml/g
500 mPas
3
1060 kg/m
*
≤ 200 mg/l
(stainless steel 1.4301)
7
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