STM 17350250 User manual

UREA/DEF AC TRANSFER PUMP
USER’S MANUAL
MODEL NUMBER: 17350250, 17350251
WARNING: Read carefully and understand all INSTRUCTIONS before operating.
Failure to follow the safety rules and other basic safety precautions may result in serious
personal injury.

1 of 4
UREA/DEF AC TRANSFER PUMP
USER’S MANUAL
MODEL NUMBER
17350250 & 17350251
A. MACHINE DESCRIPTION
PUMP: Self-priming, volumetric, diaphragm pump,equipped with by-pass valve.
MOTOR: Asynchronous motor, single-phase, 2 pole, closed type (protection class IP55 in conformance with EN 60034-5-86 regulations)
self-ventilated.
B.TECHNICAL DATA
B1. ELECTRICAL SPECIFICATIONS
PUMP MODEL
17350250
17350251
ELECTRICAL POWER
Current
AC
AC
Voltage(V)
230
120
Frequency
50Hz
60Hz
Flow Rate
25LPM
8GPM
300
300
3/4”
3/4”
POWER
Nominal(*) (Watt)
Connection
Inlet/Outlet
C. OPERATING CONDITIONS
C1. ENVIRONMENTAL CONDITIONS
TEMPERATURE: Min. -10˚C（14˚F）/ Max. +60˚C(140˚F)
RELATIVE HUMIDITY: Max. 90%
ATTENTION! The temperature limits shown apply to the pump components and must be respected to avoid
possible damage or malfunction.
C2. ELECTRICAL POWER SUPPLY
Depending on the model, the pump must be supplied by a single-phase alternating current line whose nominal values are shown in the
table in Paragraph B1 – ELECTRICAL SPECIFICATIONS.
The maximum acceptable variations from the electrical parameters are:
Voltage: +/-5% of the nominal value
Frequency: +/-2% of the nominal value
ATTENTION!
Power from lines with values outside the indicated limits can damage the electrical components.
C3.WORKING CYCLE
The pumps are designed for continuous use under maximum back pressure.
ATTENTION!
Functioning under by-pass conditions is only allowed for brief periods of time (2-3minutes maximum).
C4. FLUIDS PERMITTED
• Chemical products: Urea, weak acid & weak alkaline fluid etc.
• Water
D. MOVING AND TRANSPORT
Given the limited weight and size of the pumps (see overall dimensions), moving the pumps does not require the use of lifting devices.
The pumps were carefully packed before shipment.Check the packing material on delivery and store in the dry place.
E. INSTALLATION
E1. DISPOSING OF THE PACKING MATERIAL
The packing material does not require special precautions,not being in any way dangerous or polluting.
Refer to local regulations for its disposal.
E2. PRELIMINARY INSPECTION
• Check that the machine has not suffered any damage during transport or storage.
• Clean the inlet and outlet openings, removing any dust or residual packing material.
• Make sure that the motor shaft turns freely.
• Check that the electrical specifications correspond to those shown on the identification plate.
ATTENTION!
THE MOTORS ARE NOT OF AN ANTI-EXPLOSIVE TYPE. Do not install them where inflammable vapours can be present.

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UREA/DEF AC TRANSFER PUMP
USER’S MANUAL
E. INSTALLATION
MODEL NUMBER
17350250 & 17350251
E3. CONNECTING THE TUBING
• Before connection, make sure that the tubing and the suction tank are free of dirt and thread residue that could damage the pump and
its accessories.
• Before connecting the delivery tube, partially fill the pump body with fluid to facilitate priming.
• Do not use conical threaded joints that could damage the threaded pump openings if excessively tightened.
SUCTION TUBING:
- Minimum recommended nominal diameter: 3/4”
- Nominal recommended pressure: 10bar / 145psi
- Use tubing suitable for functioning under suction pressure
DELIVERY TUBING:
- Minimum recommended nominal diameter: 3/4”
- Nominal recommended pressure: 10bar/145psi
ATTENTION!
It is the installer’s responsibility to use tubing with adequate characteristics.
Loosening of the connections (threaded connections, flanging,gasket seals) can cause serious ecological and safety problem.
Check all the connections after the initial installation and on a daily basis after that.
Tighten the connections,if necessary.
F. DAILY USE
G. MAINTENANCE
a. If using flexible tubing, attach the ends of the tubing to the tanks. In the absence of an appropriate slot, solidly grasp the delivery tube
before beginning dispensing.
b.Before starting the pump,make sure that the delivery valve is closed (dispensing nozzle or line valve).
c.Turn the ON/OFF switch to ON.The by-pass valve allows functioning with the delivery closed only for brief periods.
d. Open the delivery valve,solidly grasping the end of the tubing.
e. Close the delivery valve to stop dispensing.
f. When dispensing is finished, turn off the pump.
ATTENTION!
Function with the delivery closed is only allowed for brief periods (2-3 minutes maximum).
After using,make sure the pump is turned off.
All models are designed and constructed to require a minimum of maintenance.
In any case always bear in mind the following basic recommendations for a good functioning of the pump:
- On a weekly basis, check that the tubing joints have not loosened,to avoid any leakage.
- On a monthly basis, check the pump body and keep it clean of any impurities.
- On a weekly basis, check and keep clean the line suction filter.
- On a monthly basis, check that the electric power supply cables are in good condition.
H. NOISE LEVEL
Under normal working conditions the noise emission from all models does not exceed the valve of 75 db at a distance of 1 meter from
the electric pump.
I. DISPOSING OF CONTAMINATED MATERIALS
In the event of maintenance or demolition of the machine, do not disperse contaminated parts into the environment.
Refer to local regulations for their proper disposal.

3 of 4
UREA/DEF AC TRANSFER PUMP
USER’S MANUAL
MODEL NUMBER
17350250 & 17350251
J.DIMENSIONAL DATA
K. PROBLEMS AND SOLUTIONS
PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION
The Motor is not turning Lack of electric power Check the electrical connecting
Motor Problems Contact the Service Department
The motor turns slowly when starting Low voltage in the electric power line Bring the voltage back within the anticipated
limits
Low level in the suction tank
Filter clogged
Excessive suction pressure Lower the pump with respect to the level of
the tank or increase the cross-section of the
tubing
High loss of head in the delivery circuit
(working with the by-pass open)
Use shorter tubing or of greater diameter
By-pass valve blocked Dismantle the valve, clean and/or replace it.
Air entering the pump or the suction tubing Check the seals of the Connections
A narrowing in the suction tubing Use tubing suitable for work ing under
suction pressure
Low rotation speed Check the voltage at the pump. Adjust the
voltage and/or use cables of greater cross-
section
The suction tubing is resting on the bottom
of the tank
Raise the tubing
Increased pump noise Cavitation occurring Reduce suction pressure
Irregular functioning of the by-pass Dispense uid until the air is purged from
the by-pass system
Leakage from the pump body Diaphragm damaged Check and replace the diaphragm
182
169
7
100
292
8013
131

4 of 4
UREA/DEF AC TRANSFER PUMP
USER’S MANUAL
MODEL NUMBER
17350250 & 17350251
L: DIAGRAM & PARTS LIST
No.
1
2
3
4
5
6
7
8
9
10
11
12
No.
13
14
15
16
17
18
19
20
21
22
23
24
Description
Holder
Hose Tail
Nutating Disk
Nut
Bolt
Bolt
Check Ring
Bearing
Check Ring
Transmission Shaft
Bearing
Pump Base
Description
Check Ring
Motor
Switch
Power cable
Diaphragm
One-way Diaphragm
Fluid Part
O-Ring
Diaphragm
Plate
Pump Cover
Bolt
Qty.
1
2
1
2
3
5
1
1
1
1
1
1
Qty.
1
1
1
1
1
5
1
1
1
1
1
9
No.
25
26
27
28
29
30
31
32
33
34
Description
O-Ring
O-Ring
Plate
Bolt
By-pass valve Spring
Valve
Bolt
O-Ring
Seal
Washer
Qty.
2
1
1
4
1
1
1
1
1
3
1 2 3456
78910 11
12 13 14
15 16
17
18
19
20
21
22
232425
26
27
28
29 30
31 32
33
34