Doseuro B 125N-8 User manual

2014 EDITION
Reciprocating metering pump
with hydraulic diaphragm
USE AND MAINTENANCE MANUAL
PUMPING HEADS
ATTENTION:
Industrial machinery for professional use.
These instructions are for qualified personnel
Translation of the
original instructions
EN
METERING PUMP
WITH SPRING RETURN
SR Series
mod. B HYDRAULIC
DIAPHRAGM
B 125N
B 175N
B 250N

DOSEURO®
XMPE0TMB125SST014 2/12 1st Edition - 2014
TABLE OF CONTENTS
Ref. Title Page
1 PREFACE 3
1.1 General prescriptions 3
2 TECHNICAL DATA 4
2.1 Technical data of pump 4
2.2 Sound vibration emitted by the pump 6
3 OPERATIONS TO BE PERFORMED ON THE HEAD 6
3.1 Periodical check of head 6
3.2 Troubleshooting 7
3.3 Head disassembly and diaphragm replacement 8
3.4 Piston disassembly and re-assembly 9
3.5 Filling of oil chamber 9
3.6 Routine maintenance 10

DOSEURO®
XMPE0TMB125SST014 3/12 1st Edition - 2014
PREFACE
General prescriptions
This manual refers to the use and maintenance of the heads (hydraulic part) of the hydraulic
diaphragm spring return metering pumps model B 125N/ B 175N/ B250 N.
This manual is supplied together with the SR series pumps, model A/ B/ BR / SD / D use and
maintenance manual, to be consulted for any further information and which contains the CE
declaration of conformity.
1
1.1

DOSEURO®
XMPE0TMB125SST014 4/12 1st Edition - 2014
TECHNICAL DATA
Below are the tables with the technical data characteristic of each individual pump model.
Technical data of pump
The pressures indicated in the tables must never be exceeded in order to avoid any kind of
inconvenience. Should it be necessary to run the pump at a higher pressure, contact our technical
department.
The indicated flow rate value is subject to variations in view of the working pressure of the pumped liquid,
the viscosity and the conditions of installation.
The number of strokes per minute is calculated with 4-pole motors (~1400 rpm)
Characteristic data Model B 125N
FREQUENCY
Hz
50
60
50
60
50
60
50
60
Max. pressure
bar (Kg/cm2)
Diaphragm - Valves
REDUCTION
RATIO
I (1:40)
F (1: 24)
C
(1:14,5)
B (1:12)
AISI
PVC
Ø
mm
AISI
PVC
Att.
Ø
STROKES
min/1'
35
42
58
70
96
116
116
/
0.18
kW
0.25
kW
0.18
kW
0.25
kW
Type
Type
G.m.
Flow rate l/h
B 125N - 8
/
/
1.5
1.8
2.4
3
3
/
20
-
10
-
50
AB 3
AC 3
1/2"
B 125N - 12
2.7
3.2
4.5
5.4
7.4
9
9
/
AB 3
AC 3
1/2"
B 125N - 18
6.6
7.9
11
13.2
18
22
22
/
70
AB 5
AC 4
1/2"
B 125N - 25
12.6
15.1
21
25.2
34
42
42
/
AB 5
AC 5
1/2"
B 125N - 30
18
21.6
30
36
49
60
60
/
14
20
AB 6
AC 8
1/2"
B 125N - 40
32.5
39
54
65
89
108
108
/
8
13.2
8
10
90
AB 8
AC 8
1/2"
Characteristic data Model B 175N
FREQUENCY
Hz
50
60
50
60
50
60
Max. pressure
bar (Kg/cm2)
Diaphragm - Valves
REDUCTION
RATIO
F (1:20)
C (1:14,5)
B
(1:11.5)
AISI
PVC
Ø mm
AISI
PVC
Att.
Ø
STROKES
min/1'
70
84
96
116
120
/
0.25
kW
0.37
kW
0.25
kW
0.37
kW
Type
Type
G.m.
Flow rate l/h
B 175N - 8
2.6
3.12
3.5
4.2
4.4
/
20
-
10
50
AB 3
AC 3
1/2"
B 175N - 12
7.6
9.12
10.4
12.4
13
/
AB 3
AC 3
1/2"
B 175N - 18
18
21.6
24
28.8
32
/
70
AB 5
AC 4
1/2"
B 175N - 25
36
43.2
49
58.8
61
/
AB 6
AC 5
1/2"
B 175N - 30
51
61.2
69
82.8
88
/
AB 6
AC 8
1/2"
B 175N - 40
92
110.4
126
151.2
158
/
12
20
90
AB 8
AC 8
1/2"
B 175N - 50
144
172.8
197
236.4
247
/
7.5
11
7.5
10
120
AB 11
AC 11
3/4"
B 175N - 55
174
208.8
238
285.6
299
/
6.3
11
6.3
10
AB 13
AC 13
3/4"
B 175N - 65
243
291.6
333
399.6
418
/
4.5
7.8
4.5
7.8
AB 13
AC 13
3/4"
2
2.1
ATTENTION!

DOSEURO®
XMPE0TMB125SST014 5/12 1st Edition - 2014
Characteristic data Model B 250N
FREQUENCY
Hz
50
60
50
60
50
60
Max. pressure bar (Kg/cm2)
Diaphragm - Valves
REDUCTION
RATIO
F (1:25)
C (1:14,5)
B (1:12,5)
AISI
PVC
Ø
mm
AISI
PVC
Att.
Ø
STROKES
min/1'
56
67
96
116
112
/
0.55
kW
0.75
kW
0.55
kW
0.75
kW
Type
Type
G.m.
Flow rate l/h
B 250N - 40
105
126
180
216
210
/
11
-
10
-
120
AB 11
AC 11
3/4"
B 250N - 50
165
198
282
338
330
/
11
-
AB 13
AC 13
3/4"
B 250N - 55
200
240
342
410
400
/
11
-
AB 13
AC 13
3/4"
B 250N - 65
278
333.6
476
571.2
556
/
9
-
9
-
160
AB 17
AC 17
1"
B 250N - 75
371
445.2
636
763.2
742
/
6.6
8.7
6.6
8.7
AB 22
AC 22
1"
B 250N - 90
534
640.8
915
1098
1068
/
4.7
6.2
4.7
6.2
AB 22
AC 22
1"
Characteristic data Model AP - B 125N
FREQUENCY Hz
50
60
50
60
50
60
50
60
Max. pressure
bar (Kg/cm2)
Diaphragm - Valves
REDUCTION RATIO
I (1:40)
F (1: 24)
C (1:14,5)
B (1:12)
Ø mm
AISI
Att. Ø
AISI 316
STROKES min/1'
35
42
58
70
96
116
116
/
0.18 kW
0.25 kW
Type
G.m.
Flow rate
l/h
B 125N - 8
/
/
1.5
1.8
2.4
3
3
/
60
ND
50
AB 3
1/2"
B 125N - 12
2.7
3.2
4.5
5.4
7.4
9
9
/
60
ND
AB 3
1/2"
B 125N - 18
6.6
7.9
11
13.2
18
22
22
/
40
60
70
AB 5
1/2"
B 125N - 25
12.6
15.1
21
25.2
34
42
42
/
ND
34
AB 5
1/2"
B 125N - 30
18
21.6
30
36
49
60
60
/
ND
23
AB 6
1/2"
Characteristic data Model AP - B 175N
FREQUENCY Hz
50
60
50
60
50
60
Max. pressure
bar (Kg/cm2)
Diaphragm - Valves
REDUCTION RATIO
F (1:20)
C (1:14,5)
B (1:11.5)
AISI 316
Ø mm
AISI
Att. Ø
STROKES min/1'
70
84
96
116
120
/
0.25 kW
0.37 kW
Type
G.m.
Flow rate l/h
B 175N - 8
2.6
3.12
3.5
4.2
4.4
/
60
ND
50
AB 3
1/2"
B 175N - 12
7.6
9.12
10.4
12.4
13
/
60
ND
AB 3
1/2"
B 175N - 18
18
21.6
24
28.8
32
/
60
ND
70
AB 5
1/2"
B 175N - 25
36
43.2
49
58.8
61
/
37.5
53.5
AB 6
1/2"
B 175N - 30
51
61.2
69
82.8
88
/
ND
37
AB 6
1/2"
B 175N - 40
92
110.4
126
151.2
158
/
ND
20
90
AB 8
1/2"
B 175N - 50
144
172.8
197
236.4
247
/
ND
13
120
AB 11
3/4"
Characteristic data Model AP - B 250N
FREQUENCY Hz
50
60
50
60
50
60
Model B
Max. pressure bar
(Kg/cm2)
Diaphragm - Valves
REDUCTION RATIO
F (1:25)
C (1:14,5)
B (1:12,5)
Ø
mm
AISI
Att. Ø
STROKES min/1'
56
67
96
116
112
/
0.55 kW
0.75 kW
Type
G.m.
Flow
rate l/h
B 250N - 40
105
126
180
216
210
/
23.8
31
120
AB 11
3/4"
B 250N - 50
165
198
282
338
330
/
15
20
AB 13
3/4"
B 250N - 55
200
240
342
410
400
/
ND
16
AB 13
3/4"
B 250N - 65
278
333.6
476
571.2
556
/
ND
12
160
AB 17
1"

DOSEURO®
XMPE0TMB125SST014 6/12 1st Edition - 2014
SOUND VIBRATION EMITTED BY THE PUMP
Below are the results of the phonometric measurements carried out on the series pumps.
These tests were carried out by an external laboratory in compliance with Directives and Standards UNI
EN ISO 3744:2009 and Directive ISO 2002/44/EC.
Investigation table of phonometric pressure
Model B 125N
Condition of pressurised pump
Maximum sound emission
on the surface
Average level of
pressure on the surface.
Level of
sound power
dB(A) 71.7
dB(A) 67.9
dB(A) 71.4
Model B 175N
Condition of pressurised pump
Maximum sound emission
on the surface
Average level of
pressure on the surface.
Level of
sound power
dB(A) 76.7
dB(A) 73.2
dB(A) 76.7
Model B 250N
Condition of pressurised pump
Maximum sound emission
on the surface
Average level of
pressure on the surface.
Level of
sound power
dB(A) 79.3
dB(A) 75.6
dB(A) 79.1
OPERATIONS TO BE PERFORMED ON THE HEAD
Periodical check of the head
Failures or malfunctions may occur due to negligence leading to extraordinary maintenance: proceeding
with a periodical visual check, as described in the SR REDUCER manual, preventive maintenance
chapter. It is, at times, possible to avoid the arising of situations that require extraordinary maintenance.
In the presence of these anomalies we recommend readily
intervening in order to avoid safety problems, a reduced flow
rate and reduced efficiency of the pump.
Summarising, the checks to be carried out are:
Periodical checks of the pumping head must be carried out to
ensure that the pump is safe and operating correctly.
Particular attention must be taken if the head installed is made
of plastic as it is more sensitive to temperature variations and
settling phenomena.
Check for oil leaks from the filler and drain caps, from the
diaphragm pinching or from the piston seal. Any one of these
leaks may initially cause a decrease in the flow rate, followed
by the breaking of the diaphragm at a later date.
Check for dosed liquid leaks from the valves.
Chapter 3
3.1
2.2
ATTENTION!

DOSEURO®
XMPE0TMB125SST014 7/12 1st Edition - 2014
Troubleshooting
This chapter describes some inconveniences that may arise during machine use.
We propose some possible interventions: it is good practice to initially attempt to resolve a
problem applying the most simple of solutions. Never attempt repairs if unsure of what you are
about to do: greater damage may be caused.
The indications described in the following table help in the event of troubleshooting.
TROUBLESHOOTING
Inconveniences
Causes
Solutions
Low delivery pressure
Low flow rate
1 - Clogged suction system:
Clean suction filter. Check the
suction piping and the feed tank
for obstructions or partially
closed valves
2 - Worn safety relief/vent
valve seat:
Check the safety relief/vent
valve, if the liquid leaks - switch-
off the pump and check
3 - pump not completely
primed (air bubble in the
suction pipe):
Excessive suction height, respect
NPSHr value, install a suction
dampener
4 –incorrectly connected
motor:
Check the motor plate again for
the correct wiring sequence.
Check the phases.
5 - dirty pump valves:
Inspect valve units. Clean or
replace the components if
necessary.
6 - Oil leaks through the filler
and drain caps
Loose caps or damaged gaskets,
to be replaced.
7 - Damaged piston seal
gasket.
Air inlet in oil chamber through
piston seals. Scratched piston
Replace the seal gaskets or the
piston
8 - insufficient oil in oil
chamber
Insufficient interposed fluid: bring
the piston to 0% FDC by acting
on the adjusting knob, remove
the filler cap and top-up with oil,
reposition the cap.
9 - air entering the head
Verify the presence of inlet air in
the suction pipe. Check junctions
between pipes, seals around the
valve stems, and the connections
of the instruments.
Check the diameter and piping
route.
10 - insufficient suction
pressure
Increase the suction pressure.
Reduce the suction height or
increase the liquid level in the
feed tank.
11 - Circuitous piping route
with the presence of chokes;
pipe inner diameter smaller
than the valve passage area
Check diameter and piping route
3.2
ATTENTION!

DOSEURO®
XMPE0TMB125SST014 8/12 1st Edition - 2014
TROUBLESHOOTING
Inconveniences
Causes
Solutions
Excessive noise
1 - air entering the head
Verify the presence of inlet air in
the suction pipe. Check junctions
between pipes, seals around the
valve stems, and the connections
of the instruments.
If the air is entering through the
stuffing box, adjust or replace it.
2 - foreign material inside
valve
Inspect valve units. Clean or
replace the components if
necessary.
3 - excessive lifting of valves
Replace the worn parts
4 - safety relief valve or other
accessories in delivery piping
cause noise
A quick closing of the valve,
solenoid valve or cock will
produce a water hammer. This
pressure wave is transmitted to
the pump resulting in noise.
A pulsation dampener before the
back pressure valve may be
requested. A different type of
valve may be requested.
The pumped liquid is mixed
with hydraulic chamber oil
The diaphragm is broken
Assess the state of the
components, if damaged.
Replace the diaphragm and any
"OR", the oil chamber, the piston,
the seal gaskets.
Run the filling procedure.
HEAD DISASSEMBLY AND DIAPHRAGM REPLACEMENT
In this pump model the head is directly blocked on the oil
chamber, therefore, the oil contained in the chamber must be
drained for any maintenance intervention to the various
components.
Proceed as follows:
Disconnect the piping from the valves.
Drain the oil chamber by loosening the cap underneath,
drain the contents into a container and dispose of it
according to regulations.
Loosen the screws located on the front of the pumping
head.
Remove the head from the pump.
Remove the diaphragm, replace if damaged.
Replacement is recommended if the piston and oil chamber are
damaged due to the corrosion of the pumped product.
N.B.: Once the maintenance operations are complete, carry
out the disassembly operations in reverse order to
reassemble the components.
3.3

DOSEURO®
XMPE0TMB125SST014 9/12 1st Edition - 2014
Piston disassembly and re-assembly
The piston is blocked on the slide by means of two dowels, one visible in the upper part and the other
hidden in the lower part.
Proceed as follows to disassemble the piston:
After having disassembled the head and checked the oil chamber.
Remove the covering protections.
Loosen the screws inside the lantern blocking the oil chamber.
Remove the oil chamber.
Remove the gasket ring from the piston
Loosen the visible dowel.
Hold the piston and turn it until the second dowel is visible, then loosen it.
Check for wear of the gasket and piston, replace if required.
Once the operations are complete, carry out the disassembly operations in reverse order to
reassemble the components.
N.B.: The piston must be reassembled taking care to tighten the two dowels with the same force
so that the piston is coaxial with the slide.
FILLING OF OIL CHAMBER
Once the maintenance operations are complete and the head components reassembled, fill the oil
chamber. The following tables feature some brands and necessary quantities. For proper operation,
proceed as follows:
Turn the adjusting knob clockwise to bring the piston to FDC (at
0% of stroke), for pumps with an 8 and 10 diameter piston, adjust
to 50%. This can be made easier by electrically powering the
pump.
Once the operation is complete, if the pump has been electrically
powered it must be switched off to operate safely.
Fill the oil chamber up to the cap support plane, hammer gently
with a rubber mallet to facilitate the evacuation of air bubbles
formed during filling, wait a few minutes and top-up to the brim.
Delicately fasten the cap with the wrench.
3.4
3.5
CLOCKWISE
rotation
KNOB
ATTENTION!
HEAD
COMPOSITION
Rotation of
piston
Loosening of dowels
blocking piston

DOSEURO®
XMPE0TMB125SST014 10/12 1st Edition - 2014
The pump is now ready for operation and can be connected to the plant.
WHITE MINERAL OIL 32 (used in initial filling)
Some brands and their initials are featured for exemplification purposes:
TYPES OF EQUIVALENT OILS
Shell
Ondina Oil 32
BP
Energol WM 4
TotalErg
Finavestan A180B
IP
Solaria Oil 32
Castrol
Optimol Optileb DAB 8
Agip
OBI 12
Alternatively, use hydraulic oil 32 (some examples can be found below)
TYPES OF EQUIVALENT OILS
Shell
Tellus Oil 32
BP
Energol HLP-Z
32
API
CIS 32
TotalErg
Azolla Zs 32
IP
Hydrus Oil 32
Esso
Nuto H 32
Castrol
Hyspin Aws 32
Agip
OSO 32
Mobil
DTE 24
Before starting the pump, the operator must check that the plant shut-off valves, previously
closed for maintenance, are opened.
ROUTINE MAINTENANCE (ref. UNI 11063)
The table shows the parts subject to greater wear which therefore require routine maintenance. We
recommend verification and replacement, if necessary.
Components to be checked
Maintenance period
Oil chamber
Head
Valve unit
Hydraulic oil
Gaskets
Piston
Diaphragm
Plastic
Metal
Hours
500
Half-yearly
X
X
X
X
X
X
Annual
In case the pump is used continuously and in particularly harsh conditions, we recommend reducing the
verification times.
3.6
ATTENTION!
AMOUNT OF OIL REQUIRED TO FILL THE OIL
CHAMBER IN ml
Piston
Ø mm
Series SR
Mod. B 125N - B 175N
Mod. B 250N
8
72
/
12
72
/
18
108
/
25
101
/
30
106
/
40
190
405
50
397
397
55
390
390
65
385
950
75
/
918
90
/
863

DOSEURO®
XMPE0TMB125SST014 11/12 1st Edition - 2014
NOTES:

DOSEURO®
XMPE0TMB125SST014 12/12 1st Edition - 2014
Cert. No. 5942
For a better use of your metering pump, choose:
DOSEURO®S.r.l ACCESSORIES.
Request them to our Sales Department
Doseuro®S.r.l.
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