GRUNDFOS DATA BOOKLET

SEG.40.31.2.50B
Grundfos pump 96075915

Thank you for your interest in our products. Please contact us for more information, or visit our website

https://www.lenntech.com/grundfos/SEGFAM/96075915/SEG-40-31-2-50B.html

info@lenntech.com
tel. +31 152 610 900
fax. +31 152 616 289

BE > THINK > INNOVATE

 Position Qty. Description
1 SEG.40.31.2.50B

Product No.: On request

Non-self-priming, single-stage, centrifugal pump with horizontal discharge port, specifically designed for
lift and pumping of wastewater containing discharge from toilets. The pump is equipped with a grinder
system that grinds destructible solids into small pieces so that they can be led away through pipes of a
relatively small diameter.
The surface of the pump is smooth to prevent dirt and impurities from sticking to the pump. A corrosion
resistant stainless steel clamp is securing the motor to the pump housing and allow for ease of service
of the pump.
For maintaining maximum pump efficiency during the pump life, a SmartTrim system allows easy
adjustment of impeller clearance.

Further product details

This grinder pump is specially designed for pumping effluent and untreated domestic sewage in areas
with no sewer system or where gravitation systems are unsuitable.
The pump is designed for transfer of domestic and municipal wastewater:
- in sparsely populated areas
- in small villages and farms
- in areas of difficult topography
- in areas with high groundwater

The pump can also remove industrial wastewater containing fibres in industrial applications, such as
washing plants.

Pump
The pump is primarily made of cast iron with surface treatment of powder coating: black
NCS9000N/RAL 9005, gloss 30, thickness 100 μ.
The pump features a patented grinder system, ensuring extremely high efficiency and reliable
operation. Quick and easy dismantling for replacement of wear parts. No special tools are required.

A stainless-steel clamp connection between motor and pump housing ensures easy inspection and
service of the impeller and shaft seal.
The shaft seal consists of a cartridge seal that ensures a reliable sealing between pumped liquid and
motor.
- Primary seal: silicon carbide/silicon carbide (SiC/SiC) mechanical shaft seal
- Secondary seal: lip seal
In connection with service, the mechanical shaft seal and the lip seal are supplied as one unit ready for
fitting.

Printed from Grundfos Product Centre [2018.06.003] 1/15

 This pump is equipped with the unique SmartTrim system that enables you to easily restore the factory-set impeller
clearance and maintain peak pumping efficiency. To do this, remove the cutter head and adjust the SmartTrim nut
on the impeller. This can be done on site without dismantling the pump and without using special tools.

The pump has been tested and approved by VDE.

Motor
The motor is a watertight, totally encapsulated motor, supplied with a 10 m power cable. The
stainless-steel plug is fastened with a union nut. This nut and O-rings provide sealing against ingress of
the liquid. The plug is polyurethane-embedded, ensuring a watertight and durable seal around the leads
of the cable. This prevents the ingress of water into the motor through the cable in case of cable
breakage or adverse handling in connection with installation or service.
The motor construction is compact with a short shaft. This reduces vibrations, resulting in an increased
efficiency and life of the shaft seal and ball bearings. The motor has two thermal switches in the motor
windings to protect the motor against overheating.

Controls:
Moisture sensor: without moisture sensors
AUTOADAPT: NO

Liquid:
Liquid temperature range: 0 .. 40 °C
Density: 998.2 kg/m³

Technical:
Type of impeller: GRINDER SYSTEM
Primary shaft seal: SIC/SIC
Secondary shaft seal: CARBON/CERAMICS
Approvals on nameplate: PA-I
Curve tolerance: ISO9906:2012 3B2

Materials:
Pump housing: Cast iron
EN1561 EN-GJL-200
Impeller: Cast iron
EN1561 EN-GJL-200

Installation:
Maximum ambient temperature: 40 °C
Maximum operating pressure: 6 bar
Flange standard: DIN
Pipework connection: DN40/50
Pump outlet: DN 40
Pressure rating: PN 10
Maximum installation depth: 10 m
Auto-coupling: 96076063

Electrical data:
Power input - P1: 3.7 kW
Rated power - P2: 3.1 kW
Mains frequency: 50 Hz
Rated voltage: 3 x 400-415 V
Voltage tolerance: +6/-10 %
Max starts per. hour: 30
Rated current: 7A
Starting current: 43 A
Rated current at no load: 3.1 A
Cos phi - power factor: 0.86
Cos phi - p.f. at 3/4 load: 0.81
Cos phi - p.f. at 1/2 load: 0.71
Rated speed: 2900 rpm
Moment of inertia: 0.01 kg m²
Motor efficiency at full load: 84 %
Motor efficiency at 3/4 load: 82 %

Printed from Grundfos Product Centre [2018.06.003] 2/15

 Position Qty. Description
Motor efficiency at 1/2 load: 79 %
Number of poles: 2
Start. method: direct-on-line
Enclosure class (IEC 34-5): IP68
Insulation class (IEC 85): F
Explosion proof: no
Length of cable: 10 m
Cable type: LYNIFLEX
Type of cable plug: NO PLUG

Others:
Net weight: 75.6 kg
Danish VVS No.: 391342181

Printed from Grundfos Product Centre [2018.06.003] 3/15

 On request SEG.40.31.2.50B 50 Hz
H SEG.40.31.2.50B, 3*400 V, 50Hz eta
[m] [%]

40

35

30 60

25 50

20 40

15 30

10 20

5 10

0 0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 Q [l/s]
P
[kW]

4.0
P1

3.5

P2
3.0

2.5

2.0

1.5

1.0

0.5

Printed from Grundfos Product Centre [2018.06.003] 4/15

 H SEG.40.31.2.50B, 3*400 V, 50Hz eta
Description Value [m] [%]
General information: 40
Product name: SEG.40.31.2.50B
Product No: On request
35
EAN number: On request
Technical:
Max flow: 5 l/s 30 60

Head max: 37 m
Type of impeller: GRINDER SYSTEM 25 50
Primary shaft seal: SIC/SIC
Secondary shaft seal: CARBON/CERAMICS 20 40
Approvals on nameplate: PA-I
Curve tolerance: ISO9906:2012 3B2
15 30
Materials:
Pump housing: Cast iron
10 20
EN1561 EN-GJL-200
Impeller: Cast iron
EN1561 EN-GJL-200 5 10

Installation:
Maximum ambient temperature: 40 °C 0 0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 Q [l/s]
Maximum operating pressure: 6 bar
P
Flange standard: DIN [kW]
P1
Pipework connection: DN40/50
3.5
Pump outlet: DN 40
3.0 P2
Pressure rating: PN 10
Maximum installation depth: 10 m 2.5
Inst dry/wet: SUBMERGED 2.0
Auto-coupling: 96076063 1.5
Liquid:
1.0
Liquid temperature range: 0 .. 40 °C
0.5
Density: 998.2 kg/m³
0
Electrical data:
Power input - P1: 3.7 kW
100

M16 271

Rp 1 1/2"

365

Rp 1 1/2"

Rated power - P2: 3.1 kW

100
134

Mains frequency: 50 Hz
Rated voltage: 3 x 400-415 V Rp 1 1/2"
365

Voltage tolerance: +6/-10 %

Max starts per. hour: 30
Rated current: 7A Rp 1 1/2"
652

Starting current: 43 A
Rated current at no load: 3.1 A
80
215

Cos phi - power factor: 0.86

Cos phi - p.f. at 3/4 load: 0.81
Cos phi - p.f. at 1/2 load: 0.71 271 M16

Rated speed: 2900 rpm

Moment of inertia: 0.01 kg m²
120

600
256

Motor efficiency at full load: 84 %

100
Motor efficiency at 3/4 load: 82 %
Motor efficiency at 1/2 load: 79 %
Number of poles: 2
Start. method: direct-on-line
Enclosure class (IEC 34-5): IP68
Insulation class (IEC 85): F
Explosion proof: no
Motor protec: THERMAL SWITCH
Thermal protec: external
Length of cable: 10 m
Cable type: LYNIFLEX
Type of cable plug: NO PLUG
Controls:
Control box: not included
Additional I/O: External
Moisture sensor: without moisture sensors
AUTOADAPT: NO
Others:

Printed from Grundfos Product Centre [2018.06.003] 5/15

 Description Value
Net weight: 75.6 kg
Danish VVS No.: 391342181

Printed from Grundfos Product Centre [2018.06.003] 6/15

 On request SEG.40.31.2.50B 50 Hz

100
134

Rp 1 1/2"

365

Rp 1 1/2"
652
80
215

271 M16
120

600
256

100

Note! All units are in [mm] unless others are stated.

Disclaimer: This simplified dimensional drawing does not show all details.

Printed from Grundfos Product Centre [2018.06.003] 7/15

 On request SEG.40.31.2.50B 50 Hz

410
70

3/4"-1"

90

652
Rp 1 1/2" 80
221

118
115

256
119

460

Note! All units are in [mm] unless others are stated.

Disclaimer: This simplified dimensional drawing does not show all details.

Printed from Grundfos Product Centre [2018.06.003] 8/15

 On request SEG.40.31.2.50B 50 Hz

143

562

40
60

173
292
256
119

Note! All units are in [mm] unless others are stated.

Disclaimer: This simplified dimensional drawing does not show all details.

Printed from Grundfos Product Centre [2018.06.003] 9/15

 On request SEG.40.31.2.50B 50 Hz

143

617

40
115

173
292
256
119

Note! All units are in [mm] unless others are stated.

Disclaimer: This simplified dimensional drawing does not show all details.

Printed from Grundfos Product Centre [2018.06.003] 10/15

 Exploded view

251a

251d

77
28
7
7a 17

301a 219

92 301a

11
92
9

51

11b

105

215a
100
215
49
18
66a
45
67

530a
530

215a 217

6
531a
531
534
534a

Printed from Grundfos Product Centre [2018.06.003] 11/15

 Sectional drawing (TM058200 for TPE2,TPE3)

3 2 1

TM058200
Printed from Grundfos Product Centre [2018.06.003] 12/15
 Exploded view ( TM057026 for MGE model H/I )

251d

251b

291
290

287
277a
287a 273b
293 502

277

252a 286

273a

273

266
275a
268
268a
289a
289

251a 288b
288
288a

252b

159e

150
152
151

157 156
156c
158

185
154
178
172

187
153 191
188
156d

156b
192
156c

159d

Printed from Grundfos Product Centre [2018.06.003] 13/15

 Parts list SEG.40.31.2.50B, Product No. On request
Valid from 1.12.2002 (0248)

Pos Description Annotation Données de classification Référence Quantité Unité

6a Pin 1 pcs
9a Key 1 pcs
26.a O-ring Diameter: 32 1 pcs
Material type: NBR
Thickness: 4
37 O-ring Diameter: 204 1 pcs
Material type: NBR
Thickness: 3
37a O-ring Diameter: 144.3 2 pcs
Material type: NBR
Thickness: 5.7
44 Grinder ring 1 pcs
45 Grinder head 1 pcs
49 Impeller 1 pcs
50 Pump housing 1 pcs
58 Retainer for seal ring 1 pcs
66 Wedge lock washer Designation: M8 A4 1 pcs
68 Adjustment nut 1 pcs
76 Nameplate 1 pcs
92 Strap cpl. 1 pcs
102 O-ring Diameter: 17.3 1 pcs
Material type: NBR
Thickness: 2.4
- 105 Shaft seal 1 pcs
Shaft seal 1
Shaft seal 1
Shaft seal 1
Retaining ring 1
Shaft seal, rotating part 1
Shaft seal, rotating part 1
Shaft seal, stationary part 1
Shaft seal, stationary part 1
106 O-ring Diameter: 50 2
Material type: NBR
Thickness: 3
107 O-ring Diameter: 90 1 pcs
Material type: NBR
Thickness: 4
112a Retaining ring 1 pcs
- 150a Stator w/housing cpl. 1 pcs
Cover 1
Flex insulation 0
48 Stator Winding resistance: 1,68 1
55 Stator housing 1
159 O-ring Diameter: 52 1
Material type: NBR
Thickness: 3
173 Cross recess Pan head screw Designation: CROSS-HEAD SCREW 1
173a Lock washer 1
- 176 Plug 1
Pin connector 1
1031 Connector pin 6
153 Ball bearing Designation: 3205.2ZR 1 pcs
153a Lock washer 1 pcs
153b Retaining ring 1 pcs
154 Ball bearing Designation: 6205.2Z.C4.SYN 1 pcs
155 Oil chamber 1 pcs
158 Waved washer 1 pcs
172 Shaft w/rotor 1 pcs

Printed from Grundfos Product Centre [2018.06.003] 14/15

 Pos Description Annotation Données de classification Référence Quantité Unité
- 181 Cable cpl. 1 pcs
198 O-ring Diameter: 34.2 1
Material type: NBR
Thickness: 3
188.a Hex socket head cap screw Length (mm): 25 12 pcs
Thread: M8
190 Lifting bracket 1 pcs
193 Hex socket head cap screw Designation: A2-70 2 pcs
Length (mm): 20
Thread: M12
193a Oil 0 L
194 Washer Internal diameter: 19 2 pcs
Outer diameter: 12.2
Thickness: 4.4

Printed from Grundfos Product Centre [2018.06.003] 15/15

Disclaimer: The information about the Grundfos pump in this document may be outdated.
Data may be subject to alterations without further notice.
Please contact us to verify the data above is still accurate/up-to-date.

All information is copyright Grundfos.

info@lenntech.com
https://www.lenntech.com
tel. +31 152 610 900
fax. +31 152 616 289