Desmi PVLN Series Troubleshooting guide

OPERATION AND MAINTENANCE INSTRUCTIONS
DESMI in-line centrifugal pump
PVLN,PVLB,PVLS and PVLJ
DESMI PUMPING TECHNOLOGY A/S
Tagholm 1 –DK-9400 Nørresundby –Denmark
Tel.:
[phone]
Fax:
[phone]
E-mail:
[email protected]
Internet:
www.desmi.com
Special pump No..................................................
Manual:
T1306
Language:
English
Revision:
H(11/19)

i
Contents
1. PRODUCT DESCRIPTION........................................................................................................................................1
2. TECHNICAL DATA..................................................................................................................................................1
2.1. TECHNICAL DATA FOR PUMPS WITH ITEM NUMBER PVLNXXXX.XX-0XX ........................................................... 1
2.2. TECHNICAL DATA FOR PUMPS WITH ITEM NUMBER 69 XX XX........................................................................... 5
2.3. EXPLANATION OF THE TYPE DESIGNATION........................................................................................................ 5
2.4. 2.4 TECHNICAL DESCRIPTION............................................................................................................................. 6
3. INSTALLATION ......................................................................................................................................................7
4. TRANSPORT/STORAGE .........................................................................................................................................8
5. START-UP .............................................................................................................................................................8
6. SYSTEM BALANCING.............................................................................................................................................9
7. MAINTENANCE ...................................................................................................................................................10
8. DISMANTLING ....................................................................................................................................................10
9. REPAIRS..............................................................................................................................................................10
9.1. REPLACING THE IMPELLER (2) .......................................................................................................................... 10
9.2. REPLACING SEAL RINGS (16 AND 17)................................................................................................................ 10
9.3. REPLACING SHAFT SEAL (22) ............................................................................................................................ 10
9.4. REPLACING BALL BEARINGS IN MOTOR ........................................................................................................... 11
10. TESTING..............................................................................................................................................................12
11. EU DECLARATION OF CONFORMITY....................................................................................................................14
12. INFORMATION RELEVANT FOR DISASSEMBLY OR DISPOSAL AT END-OF-LIFE.....................................................15
13. POSITION NUMBERS –PUMP (SEE NEXT PAGES FOR PVLN1025 & 1040)............................................................15
14. ASSEMBLY DRAWING-PUMP (SEE NEXT PAGES FOR PVLN1025 & 1040).............................................................16
15. POSITION NUMBERS –PVLN1025 & 1040...........................................................................................................17
16. ASSEMBLY DRAWING –PVLN1025 & 1040..........................................................................................................18

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DESMI Pumping Technology A/S P a g e | 1
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1. PRODUCT DESCRIPTION
These operation and maintenance instructions apply to the pump series PVLN, PVLB, PVLS, and
PVLJ.
The pumps are manufactured in sizes ranging from 25 mm to 200 mm flanges. The pumps are
centrifugal pumps "in-line type", i.e. the suction and pressure flanges have a common centre line
and the same dimensions.
The pumps are driven by an electric motor which may be a standard AC motor or a DC motor. The
impeller is mounted on the motor shaft at a shaft extension. The pumps are equipped with a
mechanical seal shaft and have holes in the bracket for inspection of leaks. Very big holes are
provided with a fixed guard.
2. TECHNICAL DATA
The pumps are divided into two groups. The item number of one of the groups is of the type
PVLNXXXX.XX-0XX, whereas the other group has a 6-digit item number of the type 69 XX XX.
As regards pumps with item number 69 XX XX –see page 6.
2.1. TECHNICAL DATA FOR PUMPS WITH ITEM NUMBER PVLNXXXX.XX-0XX
The material combination appears from the pump type and is expressed by the last 3 figures, for
example PVLN0080.21-004.
There are 5 standard material combinations 001, 002, 003, 004 and 005.
PVLN 1025/PVLN 1040
Material Code
Impeller
Elastomer
001/005
Rg5
EP-rubber
002/003
Rg5
Nitrile rubber
004
Rgl0
Nitrile rubber
PVLN1050...PVLN2200
Material Code
Impeller
Seal Rings
Elastomer
Stop Rings
001
GG20
Rg5
EP-rubber
Rg5
002
Rg5
Rg5
EP-rubber
Rg5
003
GG20
Rg5
Nitrile rubber
Rg5
004
GG20
Stainless 1)
Nitrile rubber
Stainless 1)
005
Rgl0
Stainless 1)
Nitrile rubber
Stainless 1)
1)Stainless steel DIN designation X5CrNiMol7133.
Pump casing and top piece GG20.
Pump shaft stainless steel DIN designation X8CrNiMo275.

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DESMI Pumping Technology A/S P a g e | 2
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Size
Material Code
Field of Application
PVLN1025/1040
001
002
005
Pumping of clean water and
weak aqueous solutions of
non-aggressive chemicals
PVLN1050. ..2200
001
Size
Material Code
Field of Application
PVLN1025/1040
001
Same application as above,
but
002
where there is a risk of rusting
005
at the impeller because of a
long standstill.
PVLN1050. ..2200
002
Size
Material Code
Field of Application
PVLN1025/1040
001
002
005
Brine, glycol, softened chloric
fresh water for swimming
baths.
PVLN1050...2200
003
Size
Material Code
Field of Application
PVLN1025/1040
003
004
Soda lye (004 for
PH< 9 only).
PVLN1050. ..2200
004
Size
Material Code
Field of Application
PVLN1025/1040
003
004
Chloric saline water for
Swimming baths.
PVLN1050...2200
005
Permissible temperatures from -30°C to +120°C. EP - rubber cannot be used for mineral oils/grease.
Apart from the above material codes the pumps are available in special material combinations for
other liquids. Material codes higher than 005 are used for special material combinations. For special
codes fill in the following:
Pump type : .........................................................................
Pump No. : .........................................................................
Application : .........................................................................
Comments : .........................................................................

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When using the pump for other media the operator is responsible for checking that the specified
materials in the pumps are in order. In case of doubt, contact the supplier.
The noise level for the airborne noise appears from the following list. The values indicated are
measured as middle values at a distance of l m from the machine surface in free field approx. 1.5 m
above the base plate. The sound pressure levels are general directional values which cannot be
regarded as guarantee values for each individual pump, as the sound level of a pump is to a large
extent dependent on the installation method and the operating conditions. The measuring comprise
the pump including the motor.
Sound pressure level for the PVLN-pumps:
PVLN Type
dB(a)
PVLN Type
dB(a)
1050.81
40
1100.41
71
1050.61
47
2100.61
64
1050.27
70
2100.41
72
1050.22
78
2125.62
68
1050.21
80
2125.44
74
1065.61
47
2125.43
76
1065.42
53
2125.42
77
1065.41
55
2125.41
78
2065.23
81
2150.82
69
2065.22
83
2150.62
73
1065.21
84
2150.61
74
0080.61
52
2150.43
78
0080.42
56
2150.42
79
0080.41
57
2150.41
80
0080.22
80
2200.82
70
0080.21
81
2200.81
71
2080.42
58
2200.62
74
2080.41
62
2200.61
76
2080.23
40
2200.44
79
2080.22
84
2200.43
80
2080.21
84
2200.42
81
1100.61
58
2200.41
82
Environment: The pumps are as a standard equipped with motors with protection class IP54, which
means that the motor is protected against penetrating dust and that water without pressure does not
damage the motor. The motors are dimensioned for an ambient temperature of 40°C. Pumps installed
in explosive areas must be equipped with explosion-proof motors. The pump capacity is stamped on
the name plate.

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The weight and dimensions of the pump appear from the following table.
The weight comprises an AC motor in cast iron.
Type
TN
Flange
TN
D
mm
DA
mm
DB
mm
DC
mm
H
Max.
mm
HA
Max.
mm
HB
mm
HF
Min.
mm
I
Max.
mm
J
Max.
mm
K
mm
KA
mm
KB
mm
L
mm
LA
mm
LB
mm
NxM
mm
Weight
1
1025.21
1025.22
1025.23
10
10
10
1"
25 mm
10
10
10
25
115
68
85
434
409
397
374
349
337
60
60
150
150
137
186
186
162
202
101
101
300
150
150
4xø14
30 kg
30 kg
30 kg
2
1025.41
1025.42
10
10
10
10
25
115
68
85
382
382
322
302
60
60
127
127
140
140
202
101
101
300
150
150
4xø14
25 kg
25 kg
3
1025.61
1025.62
10
10
10
10
25
115
68
85
360
360
300
300
60
60
127
127
140
140
202
101
101
300
150
150
4xø14
25 kg
25 kg
4
1040.21
1040.22
1040.23
10
10
10
1½"
40 mm
10
10
10
40
150
88
110
568
487
457
488
407
377
80
60
166
154
150
224
200
186
224
105
119
350
175
175
4xø18
50-55 kg
45-50 kg
40-45 kg
5
1040.41
1040.42
1040.43
10
10
10
10
10
10
40
150
88
110
400
405
405
320
325
325
80
60
137
127
127
162
140
140
224
105
119
350
175
175
4xø18
35 kg
30 kg
30 kg
6
1040.61
1040.62
1040.63
10
10
10
10
10
10
40
150
88
110
383
383
383
303
303
303
80
60
127
127
127
140
140
140
224
105
119
350
175
175
4xø18
30 kg
30 kg
30 kg
7
1050.21
1050.22
1050.23
1050.27
1050.28
10
10
10
10
10
2“
50 mm
10
10
10
10
10
50
165
102
125
649
576
545
510
485
559
486
455
420
395
90
110
184
166
154
150
150
249
224
200
186
186
265
125
140
400
200
200
4xø18
75-90 kg
60-70 kg
55-65 kg
50-55 kg
45-50 kg
8
1050.41
1050.42
1050.43
10
10
10
10
10
10
50
165
102
125
460
460
460
370
370
370
90
110
137
137
137
162
162
162
265
125
140
400
200
200
4xø18
40 kg
40 kg
40 kg
9
1050.61
1050.81
10
10
10
10
50
165
102
125
460
460
370
370
90
110
137
137
162
162
265
125
140
400
200
200
4xø18
40 kg
40 kg
10
1065.41
1065.42
1065.61
10
10
10
2 ½
65 mm
10
10
10
65
185
122
145
470
470
470
370
370
370
100
110
137
137
137
162
162
162
285
130
155
440
220
220
4xø18
50 kg
45 kg
50 kg
11
2065.21
2065.22
2065.23
10
10
10
10
10
10
65
185
122
145
815
815
658
705
705
548
110
125
242
224
184
313
305
249
350
175
175
450
225
225
4xø18
150-195 kg
145-155 kg
100-115 kg
12
2065.41
2065.42
10
10
10
10
65
185
122
145
564
520
454
410
110
125
154
150
200
186
350
175
175
450
225
225
4xø18
90-95 kg
85-90 kg
13
0080.21
0080.22
0080.23
10
10
10
3"
80 mm
10
10
10
80
200
138
160
699
679
642
579
559
522
120
120
184
184
166
249
249
224
320
150
170
480
240
240
8xø18
90-105 kg
85-100 kg
75-80 kg
14
0080.41
0080.42
0080.43
0080.61
10
10
10
10
10
10
10
10
80
200
138
160
530
505
492
490
410
385
372
370
120
120
150
150
137
137
186
186
162
162
320
150
170
480
240
240
8xø18
60-65 kg
55-60 kg
50-55 kg
50-55 kg

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Type
TN
Flange
TN
D
mm
DA
mm
DB
mm
DC
mm
H
Max.
mm
HA
Max.
mm
HB
mm
HF
Min.
Mm
I
Max.
mm
J
Max.
mm
K
mm
KA
mm
KB
mm
L
mm
LA
mm
LB
mm
NxM
mm
Weight
15
2080.21
2080.22
2080.23
10
10
10
3"
80 mm
10
10
10
80
200
138
160
882
830
830
752
700
700
130
120
255
242
224
330
313
305
380
175
205
540
260
280
8xø18
180-220 kg
155-200 kg
150-165 kg
16
2080.41
2080.42
10
10
10
10
80
200
138
160
579
579
449
449
130
120
154
154
200
200
380
175
205
540
260
280
8xø18
80-85 kg
75-80 kg
17
1100.41
1100.42
1100.61
1100.81
10
10
10
10
4"
100 mm
10
10
10
10
100
220
158
180
631
600
555
555
486
455
410
410
145
125
166
154
150
150
224
200
186
186
375
170
205
590
270
320
8xø18
90-100 kg
80-90 kg
75-80 kg
75-80 kg
18
2100.41
2100.61
10
10
10
10
100
220
158
180
699
594
559
454
140
125
184
154
249
200
430
195
235
620
300
320
8xø18
115-125 kg
90-95 kg
19
2125.41
2125.42
2125.43
2125.44
2125.45
10
10
10
10
10
5"
125 mm
10
10
10
10
10
125
250
188
210
1035
977
930
822
781
835
777
730
622
581
200
170
255
255
224
205
184
351
330
305
260
249
460
205
255
800
400
400
8xø18
300-315 kg
265-300 kg
240-255 kg
190-210 kg
180-190 kg
20
2125.62
10
10
125
250
188
210
701
501
200
170
166
224
460
205
255
800
400
400
8xø18
165-170 kg
21
2150.41
2150.42
2150.43
2150.44
6
6
6
6
6"
150 mm
10
10
10
10
150
285
212
240
1123
1070
1070
1012
963
910
910
852
160
175
327
261
255
255
392
351
351
330
625
285
340
925
475
450
8xø22
465-490 kg
410-425 kg
395-410 kg
355-390 kg
22
2150.61
2150.62
6
6
10
10
150
285
212
240
960
857
800
697
160
175
224
205
305
260
625
285
340
925
475
450
8xø22
335-350 kg
790-310 kg
23
2150.82
6
10
150
285
212
240
857
697
160
175
205
260
625
285
340
925
475
450
8xø22
290-300 kg
24
2200.41
2200.42
2200.43
2200.44
2200.45
6
6
6
6
6
8"
200 mm
10
10
10
10
10
200
340
268
295
1291
1278
1174
1130
1130
1101
1088
984
940
940
190
190
345
345
327
261
255
442
442
392
351
351
710
310
400
1095
565
530
8xø22
665-730 kg
605-655 kg
550-575 kg
505-520 kg
485-500 kg
25
2200.61
2200.62
6
6
10
10
200
340
268
295
1072
1020
882
830
190
190
255
224
330
305
710
310
400
1095
565
530
8xø22
460-480 kg
440-455 kg
26
2200.81
2200.82
2200.83
6
6
6
10
10
10
200
340
268
295
1020
1020
956
830
830
766
190
190
224
224
205
305
305
260
710
310
400
1095
565
530
8xø22
430-445 kg
415-430 kg
400-410 kg
2.2. TECHNICAL DATA FOR PUMPS WITH ITEM NUMBER 69 XX XX
The pumps are manufactured in various material combinations, which appear from the type
designation on the nameplate. See below.
2.3. EXPLANATION OF THE TYPE DESIGNATION
All PVLN pumps are provided with a nameplate. The type designation indicated on the nameplate is
built up as follows:
PVLNYYXX/MR-Z
XX: Pressure branch diameter
M: The material combination of the pump
R: The assembly combination of the pump
Z: Other variants
M may be the following:
A: Casing and shaft seal cover : Cast iron + cast iron alloy. Impeller and sealing rings: Bronze
(Rg10)
D: Casing and shaft seal cover : Bronze (Rg5). Impeller and sealing rings: Bronze (Rg10)
E: Special materials
The pumps can be delivered in other material combinations according to agreement with the supplier.
R may be the following:
12: .........................................................................Monobloc, without bearing in the pump

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Z may be the following:
i : PN16 flanges
j : PN25 flanges
k : Special flange
l : Other shaft seal
m : BS flanges
n : ANSI flanges
o : Shockproof design
p : Other design
q : JIS flanges
Any use of the pump is to be evaluated on the basis of the materials used in the pump. In case of
doubt, contact the supplier.
Pumps in material combinations A are primarily used for fresh water.
Pumps in material combination D are primarily used for seawater.
If the pumps are designed for special purposes the following is to be indicated:
Pump No. :
Pump type :
Application :
Comment :
2.4. 2.4 TECHNICAL DESCRIPTION
The noise level indicated is the airborne noise including the motor. The noise depends on the motor
type supplied, as the noise from the pump can be calculated as the noise level of the motor + 2dB(A).
The noise level is for pumps with electric motors.
The capacity of the pump appears from the nameplate on the pump. If the pump has been delivered
without motor, the pump capacity is to be indicated on the plate when mounting the motor.
The permissible loads on the flanges appear from the following table. The values apply to standard
pumps in bronze (Rg5) and cast iron (GG20). As to pumps in SG iron (GGG40) the values are to be
increased by factor 1.5.
Permissible loads and torques on pump flanges:

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Piping
DN
Forces (N)
Torques (Nm)
mm
FY
Fz
FX
F
My
Mz
Mx
M
25
250
320
250
480
300
150
260
420
Horizontal pipeline
at right angles to the
shaft
40
50
65
400
500
650
500
600
840
400
550
750
750
1000
1340
400
450
510
200
250
310
300 350
380
550
600
700
Suction and pressure
80
800
950
850
1500
550
350
400
750
flanges above level
of installation
100
125
1000
1250
1250
1600
1150
1430
2000
2500
650
830
400
520
500 650
900 1150
150
1500
1900
1700
2950
1000
650
800
1400
200
2000
2520
2200
3920
1330
860
1060
1860
In connection with the permissible loads on the flanges indicated in the above table there is the
following limitation:
2
2
.
2
.






















epermissiblMax
M
calculated
M
epermissiblMax
F
calculated
F
3. INSTALLATION
Insert the pump in the pipeline in the same way as a valve. The pump can be inserted in both
horizontal and vertical pipes, but not in a horizontal pipe if the motor is placed below horizontal level.
The max. loads on the flanges appear from the technical description.
When installing the pump check that it is earthed to avoid an electrical potential in the pump.
At installations pumping hot or very cold liquids the operator must be aware that it
is dangerous to touch the pump surface, and he is to take the necessary safety measures.

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4. TRANSPORT/STORAGE
The pumps are to be lifted as shown. The weights
of the pumps are stated in the technical description.
Before shipment the pump is to be fastened securely
on a pallet or the like. The centre of gravity will be
on the centre line of the motor.
The pump is to be stored in a dry area.
5. START-UP
Before starting the pump for the first time check that the electrical data of the motor
correspond to the network.
Connect the motor according to the wiring diagram in the cover of the terminal box
and provide it with a motor protection according to the rules. The motor protection to be
adjusted in accordance with the supplier's instructions. The work is to be carried out by
skilled workmen and is to observe the rules and regulations in force.
In order to protect the shaft seal the pump must never run dry.
If there is a positive suction lift, open the valve on the suction side of the pump and evacuate the air
through the air vent screw (5). If there is no positive suction lift, the plant must be equipped with a foot
valve or a non-return valve on the suction side.
Prime the pump while the air vent screw (5) is kept open. When the pump has been filled with water,
and the air has been evacuated, the system can be started. Check the direction of rotation. If the
direction is incorrect interchange 2 of the power cords. The direction of rotation is indicated by an
arrow. Make sure the bearings are running correctly and that they do not become warm.

______________________________________________________________________________
DESMI Pumping Technology A/S P a g e | 9
9400 Nørresundby –Denmark
Tel: [phone] Fax: [phone]
E-mail: [email protected]
www.desmi.com
6. SYSTEM BALANCING
Adapt pressure and water quantity to the requirements by regulating a valve on the pressure side of
the pump - never on the suction side as this may cause cavitation.
FAULT
CAUSE
REMEDY
1.Wrong direction of rotation
2. Piping system choked
Change direction of rotation to clockwise
when viewed from shaft end
Clean or replace
The pump has no
or too low capacity
3. The pump is choked
4. Suction line leaks, pump takes air
Clean the pump
Find the leakage, repair the fault,
non-return valve not submerged
5. Suction lift too high
Check data sheet Q/H curve and NPSH
or contact DESMI
6. Pump and piping system wrongly
dimensioned
As 5
1. Counter-pressure too low
Insert orifice plate or check valve,
contact DESMI
The pump uses too
much power
2. The liquid is heavier than water
3. Foreign body in pump
Contact DESMI
Dismantle the pump, remove the cause
4. Electric motor is running on 2
phases
Check fuses, cable connection and cable
The pump makes
noise
1. Cavitation in pump
Suction lift too high/Suction line wrongly
dimensioned/Liquid temperature too high

______________________________________________________________________________
DESMI Pumping Technology A/S P a g e | 10
9400 Nørresundby –Denmark
Tel: [phone] Fax: [phone]
E-mail: [email protected]
www.desmi.com
7. MAINTENANCE
The motors for small pumps are equipped with ball bearings lubricated for life and, therefore, they do
not require any attention.
As far as the big pumps are concerned, follow the lubricating prescription indicated on the motor.
During long periods of standstill it will be an advantage to start the pump every week or every two
weeks. Check the shaft seal for leaks at regular intervals.
8. DISMANTLING
Before dismantling the pump make sure that it has stopped. Empty the pump of liquid before it is
dismantled from the piping system. If the pump has been pumping dangerous liquids you are to be
aware of this and take the necessary safety measures. If the pump has been pumping hot liquids take
great care that it is drained before it is removed from the piping system.
The cable connections to be dismantled by skilled workmen.
9. REPAIRS
The following parts are exposed to wear: Shaft seal (22), impeller (2), seal rings (16 and 17) and the
ball bearings of the motor.
9.1. REPLACING THE IMPELLER (2)
Close the valves on both sides of the pump. Loosen the nuts (15) and dismantle the top piece from
the pump casing. Remove the screw (20) and take off the impeller (2). Fit the new impeller.
9.2. REPLACING SEAL RINGS (16 AND 17)
Please notice that PVLN1025 & 1040 do not have seal rings. When motor and pump have been
separated, the seal ring (17) in the pump casing (1) can be pulled out.
In order to replace the upper seal ring (16) it is necessary first to dismantle the impeller. Press the
new seal rings into place with an even push all over the face of the ring. Normal diameter difference
between seal ring and impeller 0.3-0.4 mm.
9.3. REPLACING SHAFT SEAL (22)
Dismantling as described in paragraph 9.1.
When the impeller has been dismantled, remove the key (19) and then the space bushing (21) which
is locked with a pointed screw. Please notice that PVLN1025 & 1040 do not have the space bushing
–but instead a spring holder not retained by a pointed screw. The sealing element itself can now be
pulled off the shaft.
Remove the seat ring from the top piece by pressing with a pair of screwdrivers or the like under the
collar
off the seat. If the seat cannot be removed, dismantle the top piece (4) from the motor (9) to permit
pressing from the back.
Clean the bore for seat and shaft thoroughly of dirt and rust. Remove persistent coatings, if any, by
grinding the shaft lightly with very fine emery cloth.

______________________________________________________________________________
DESMI Pumping Technology A/S P a g e | 11
9400 Nørresundby –Denmark
Tel: [phone] Fax: [phone]
E-mail: [email protected]
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Grease the new seat ring and the inserted 0-ring well with glycerine - not oil - and press it into place
in the casing. Check that the seat is fitted correctly by knocking lightly with a piece of wood. The seat
ring is to be treated very carefully to prevent the sliding surface from being scratched.
It is necessary to use a conical bush as shown below to prevent the rubber bellows from being
damaged during mounting.
Grease the back of the carbon ring with glycerine to ensure that it stays in its correct place during the
mounting. Grease the shaft, the conical bush and the rubber bellows amply with glycerine.
Press the shaft seal on to the shaft until it resists. Press the driving ring only,
Finally place the space bush (21) on the shaft and lock it with the pointed screw. Please again notice
that PVLN1025 & 1040 do not have the space bushing –but instead a spring holder not retained by
a pointed screw
When the pump has been mounted, ventilate the pump casing carefully before putting the pump into
operation.
When the pump has been running for 1-2 min., ventilate it again, after which it can start normal
operation.
Do not forget to check the direction of rotation if there is a risk that the power cords to motor have
been exchanged.
9.4. REPLACING BALL BEARINGS IN MOTOR
The ball bearing in the front bearing of the motor can be replaced without disassembling the pump.
If the ball bearing in the rear bearing of the motor is to be replaced, it is necessary to disassemble the
pump and dismantle the pump shaft (as described in paragraph 9.1):
Dismantle the top piece (4) from the motor (9). Remove the pointed screws (11) in the pump shaft (6),
the pump shaft can now be pulled off the motor shaft.
When assembling the pump again, check the motor shaft for damages in the form of marks, burrs, or
upsetting of the shaft end.
Damages, if any, are to be remedied by means of a file and fine emery cloth. This work has to be
done very carefully, especially on new motors, the shaft ends of which are often damaged during
transport. If this is not done carefully, the throw will be bigger than permitted and/or the pump shaft
will scratch the motor shaft when fitted.
Normally, the pump shaft is to go relatively smoothly on the motor shaft (manually or by means of
light strokes with a plastic hammer).
Tighten the pointed screws (the one in the middle first) in accordance with the torque indicated in the
table (page 12) and finally check that the throw stays within the indicated limits by means of an
indicator clock.

______________________________________________________________________________
DESMI Pumping Technology A/S P a g e | 12
9400 Nørresundby –Denmark
Tel: [phone] Fax: [phone]
E-mail: [email protected]
www.desmi.com
10. TESTING
After each repair check that the motor rotates easily before connecting the current.
Also remember to check the direction of rotation and to ventilate the pump.
Pump Type
Puller
M: Tightening
Torque
Max.
Throw
PVLN1025.61/62
PVLN1025.41/42
PVLN1025.21/22/23
4 Nm
4 Nm
6 Nm
60 µm
60 µm
60 µm
PVLN1040.61/62/63
PVLN1040.42/43
PVLN1040.41
PVLN1040.21/22/23
4 Nm
4 Nm
6 Nm
6 Nm
60 µm
60 µm
60 µm
60 µm
PVLN1050.61/81
PVLN1050.41/42/43
PVLN1050.27/28
PVLN1050.22/23
PVLN1050.21
SK 336
SK 336
SK 337
SK 337
SK 338
6 Nm
6 Nm
18 Nm
18 Nm
30 Nm
60 µm
60 µm
60 µm
60 µm
70 µm
PVLN1065.61
PVLN1065.41/42
SK 336
SK 336
6 Nm
6 Nm
60 µm
60 µm
PVLN2065.41/42
PVLN2065.23
PVLN2065.21/22
SK 337
SK 338
SK 338
18 Nm
30 Nm
60 Nm
70 µm
70 µm
70 µm
PVLN0080.43/61
PVLN0080.42
PVLN0080.23/41
PVLN0080.21/22
SK 336
SK 336
SK 337
SK 338
6 Nm
18 Nm
18 Nm
30 Nm
60 µm
60 µm
60 µm
70 µm

______________________________________________________________________________
DESMI Pumping Technology A/S P a g e | 13
9400 Nørresundby –Denmark
Tel: [phone] Fax: [phone]
E-mail: [email protected]
www.desmi.com
Pump Type
Puller
M: Tightening
Torque
Max.
Throw
PVLN2080.41/42
PVLN2080.21/22/23
SK 337
SK 338
18 Nm
60 Nm
60 µm
70 µm
PVLN1100.41/61
PVLN2100.61
PVLN2100.41
SK 337
SK 337
SK 338
18 Nm
18 Nm
30 Nm
60 µm
60 µm
70 µm
PVLN2125.62
PVLN2125.44/45
PVLN2125.41/42/43
SK 339
SK 339
SK 340
18 Nm
30 Nm
60 Nm
60 µm
70 µm
70 µm
PVLN2150.62/82
PVLN2150.44/61
PVLN2150.42/43
PVLN2150.41
SK 339
SK 340
SK 340
SK 340
30 Nm
60 Nm
60 Nm
150 Nm
70 µm
70 µm
70 µm
80 µm
PVLN2200.83
PVLN2200.81/82
PVLN2200.61/62
PVLN2200.44/45
PVLN2200.41/42/43
SK 339
SK 340
SK 340
SK 340
SK 340
30 Nm
60 Nm
60 Nm
60 Nm
150 Nm
70 µm
70 µm
70 µm
70 µm
80 µm
Pumps with item number 69 XX XX:
Motor Size
Puller
M: Tightening
Torque
Max.
Throw
IEC 71
4 Nm
60 µm
IEC 80
SK 336
6 Nm
60 µm
IEC 90
SK 336
6 Nm
60 µm
IEC 100/112
SK 337
18 Nm
60 µm
IEC 132
SK 338
30 Nm
60 µm
IEC 160
60 Nm
70 µm

______________________________________________________________________________
DESMI Pumping Technology A/S P a g e | 14
9400 Nørresundby –Denmark
Tel: [phone] Fax: [phone]
E-mail: [email protected]
www.desmi.com
11. EU DECLARATION OF CONFORMITY
DESMI PUMPING TECHNOLOGY A/S, hereby declare that our pumps of the type PVLN, PVLB,
PVLS and PVLJ are manufactured in conformity with the following essential safety and health
requirements in the COUNCIL DIRECTIVE 2006/42/EC on machines, Annex 1.
The following harmonized standards have been used:
EN/ISO 13857:2008
Safety of machinery. Safetydistances to prevent danger zonesbeing
reached by the upper limbs
EN 809:1998 + A1:2009
Pumps and pump units for liquids –Common safety requirements
EN12162:2001+A1:2009
Liquid pumps –Safety requirements –Procedure for hydrostatic
testing
EN 60204-1:2006/A1:2009
Safety of machinery –Electrical equipment of machines (item 4,
General requirements)
Ecodesign Directive (2009/125/EC).
Water pumps:
Commission Regulation No 547/2012.
Applies only to water pumps marked with the minimum efficiency
index MEI. See pump nameplate.
Pumps delivered by us connected with prime movers are CE-marked and comply with the above
requirements.
Pumps delivered by us without prime movers (as partly completed machinery) must only be used
when the prime mover and the connection between prime mover and pump comply with the above
requirements.
Nørresundby, March 05 2019
Henrik Mørkholt Sørensen
Managing Director
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby

______________________________________________________________________________
DESMI Pumping Technology A/S P a g e | 15
9400 Nørresundby –Denmark
Tel: [phone] Fax: [phone]
E-mail: [email protected]
www.desmi.com
12. INFORMATION RELEVANT FOR DISASSEMBLY OR DISPOSAL AT END-OF-LIFE
No damage materials are used in DESMI pumps –please refer to DESMI Green Passport (can be
sent on request –contact a DESMI sales office) –i.e. common recycling companies can handle the
disposal at end-of-life. Alternatively the pump and motor can be returned to DESMI at end-of-life for
safe recycling.
13. POSITION NUMBERS –PUMP (see next pages for PVLN1025 & 1040)
POS.
BENÆ VNELSE
DESIGNATION
BEZEICHNUNG
1
Pumpehus
Pump casing
Pumpengehäuse
2
Løbehjul
Impeller
Laufrad
3
Pakning
Gasket
Dichtung
4
Overdel
Top piece
Zwischengehäuse
5
Udluftningsventil
Air vent screw
Imbusschraube
6
Aksel
Pump shaft
Pumpenwelle
7
Akselbøsning
Shaft bush
Wellenbuchse
8
Aftrækkerflange
Dismantling flange
Abziehflansch
9
Motor
Motor
Motor
10*
Skrue
Screw
Schraube
11
Pinolskrue med krater
Pointed screw
Gewindestift
14
Pindbolt
Stud
Spannschraube
15
Møtrik
Nut
Mutter
16
Slutring, trykside
Seal ring, pressure
Spaltring druckseitig
17
Slutring, sugeside
Seal ring, suction
Spaltring saugseitig
18
Aftapningsskrue
Drain screw
Verschlußschraube
19
Pasfeder
Key
Passfeder
20
Skrue
Screw
Schraube
21
Afstandsbøsning
Space bushing
Abstandsbuchse
22
Mekanisk akseltætning
Mech. shaft seal
Gleitringdichtung
23
Spændeskive
Washer plate
Federscheibe
* Screw or stud + nut.
Pos. No. refers to drawing.
When ordering spare parts please state pump number, type number as well as position numbers and
designation.

______________________________________________________________________________
DESMI Pumping Technology A/S P a g e | 16
9400 Nørresundby –Denmark
Tel: [phone] Fax: [phone]
E-mail: [email protected]
www.desmi.com
14. Assembly Drawing-Pump (see next pages for PVLN1025 & 1040)

______________________________________________________________________________
DESMI Pumping Technology A/S P a g e | 17
9400 Nørresundby –Denmark
Tel: [phone] Fax: [phone]
E-mail: [email protected]
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15. POSITION NUMBERS –PVLN1025 & 1040
POS.
BENÆ VNELSE
DESIGNATION
BEZEICHNUNG
1
Pumpehus
Pump casing
Pumpengehäuse
02
Prop
Plug
Stecker
2
Løbehjul
Impeller
Laufrad
3
Pakning
Gasket
Dichtung
4
Motorkonsol
Bracket
Halterung
5
Udluftningsventil
Air vent screw
Imbusschraube
6
Pumpe-aksel
Pump shaft
Pumpenwelle
9
Motor
Motor
Motor
10*
Skrue
Screw
Schraube
11
Pinolskrue med krater
Pointed screw
Gewindestift
14
Pindbolt
Stud
Spannschraube
15
Møtrik
Nut
Mutter
19
Pasfeder
Key
Passfeder
20
Skrue
Screw
Schraube
22
Mekanisk akseltætning
Mech. shaft seal
Gleitringdichtung
23
Spændeskive
Washer plate
Federscheibe
24
Fjederstyr
Spring holder
Federhalter
25
Bagdæksel
Cover
Abdeckung
26
Møtrik
Nut
Mutter
100
Fodplade
Base plate
Grundplatte
200
Aftapningsskrue
Drain screw
Verschlußschraube
* Screw or stud + nut.
Pos. No. refers to drawing.
When ordering spare parts please state pump number, type number as well as position numbers and
designation.

______________________________________________________________________________
DESMI Pumping Technology A/S P a g e | 18
9400 Nørresundby –Denmark
Tel: [phone] Fax: [phone]
E-mail: [email protected]
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16. Assembly Drawing –PVLN1025 & 1040
Pos. 26 for EL-motor but not B14 flange