DRAGFLOW EL 1204 A manual 

ELECTRIC PUMP
EL 1204 A/B
--------------------------------------------
Instructions handbook / Spare parts
Via Pasubio, 40 –37069 Villafranca (VR) –Tel. [phone] –Fax [phone]
[e-mail] –www.dragflow.it

ELECTRIC PUMP EL 1204 A/B
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INDEX
PRESENTATION..………………………………………………………………. pg. 2
WARRANTY REGULATIONS.…………………………………………………. pg. 3
1.0 DESCRIPTION…………………………………………………………………... pg. 4
2.0 TRANSPORT, ASSEMBLY AND DEMOLITION.……………………………. pg. 5
3.0 STARTING AND OPERATION…………..…..………………………………... pg. 8
4.0 MAINTENANCE AND CLEANING.…..………………………………………...pg. 9
5.0 NOISE…..…….…………………………………………………………………...pg. 12
WIRING DIAGRAMS…..………………………………………………………... pg. 13
6.0 SAFETY…………………………………………………………………………...pg. 15
SPARE PARTS……..…………………………………………………………….pg. 17
WEAR SPARES……………...………………………………………….………. pg. 22
7.0 TECHNICAL SPECIFICATIONS…..…………………………………………... pg. 23

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PRESENTATION
This instructions manual has been conceived and structured for rapid and easy consultation, thanks to the
index ordered by subjects, and explanatory figures and tables.
GENERAL WARNINGS
This instructions manual must be studied by the owner of the machine, the technical personnel within the
factory, the operators, that is, all those that will be using the machine, the maintenance technician.
The manual is an integral part of the machine and contains information on its use, technical characteristics, as
well as instructions for handling, installation, assembling, regulation and maintenance.
It also contains a section for trouble-shooting, if necessary, and for the ordering of spares.
The DRAGFLOW S.r.l. technicians are always available, by telephone, fax or e-mail, to supply all the
explanations that may be needed.
This manual:
-must be considered as integral part of the machine until it is taken to the breakdown yard;
-must be kept in an easily accessible place and suitable for its preservation;
-must be consulted each time that there are problems or doubts on the operation of the machine;
-must be carefully followed for whatever regards the necessary maintenance operations set out in it.
In case it is lost, apply for a copy directly from DRAGFLOW S.r.l.
DRAGFLOW S.r.l. reserves the right to carry out all modifications to update the machine or instructions
manual according to the technological progress and the state of the art.
This constitutes no obligation to carry out modifications to the machines that have already been sold. If the
machine is ceded to a third party, it is recommended that of the instructions manual follow it.
DRAGFLOW S.R.L. RETAINS ITSELF FREE FROM LIABILITY OF ANY KIND, AND ESPECIALLY FOR:
-improper use of the machine;
-use of the machine by personnel not trained to used it;
-power supply defects;
-maintenance defects;
-unauthorized and unforeseen modifications;
-use of spares that are not original or not specific for the model;
-non observance of the instructions;
The uses of the machine for different purposes are to be considered dangerous for the operator and for the
machine. Likewise, modalities of installation and utilizations different from that indicated in the present manual
could cause damage to persons and/or to the machine itself.

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WARRANTY REGULATIONS
DRAGFLOW S.r.l. guarantees the original user that the machine will be reasonably free from factory and
material defects.
This warranty lasts for 1 ( one ) year from the invoice date, excluding wear parts ( indicated in section 4.0
of this manual “MAINTENANCE AND CLEANING” ), and refers to the connection of any defect that will be
recognized by DRAGFLOW S.r.l. as being subject to warranty (after presentation of adequate proof of claim),
in one of the following ways and at the discretion of DRAGFLOW S.r.l.:
-replacement of defective part with a new one, made available in the offices of the Purchaser at the
lowest transport rate;
-repair of defective part, after this has been returned to DRAGFLOW S.r.l. with transport expenses
prepaid.
As soon as the spare is ready, The Client will make the defective part available to DRAGFLOW S.r.l.
The warranty does not apply to those parts that result defective because of incorrect use, handling or bad
observance of the use and maintenance instructions supplied by DRAGFLOW S.r.l.
The consumable parts or those parts subject to normal wear ( such as seals and gaskets, impellers, stirrer,
wear-plates, volutes and electrical components ) are not included in this warranty.
The warranty on the electric motor is applied only if the standard electronic control console foreseen has
been installed.
If the Purchaser tries, either to repair any fault that is under guarantee, or obtain direct supply of the spare part
without previous written consent of DRAGFLOW S.r.l. the latter will not be responsible for the results of the
repair and will not be held to reimburse the expenses sustained by the Purchaser.
DRAGFLOW S.rl. declines all responsability for the expenses due to “down time”, business costs and losses
deriving there from.
All justifiable claims of breakdown will be transmitted in writing by the Purchaser to DRAGFLOW S.r.l. before
expiry of the warranty. There are no other guarantees, explicit or implicit, that can be treated or adapted for
any particular purpose.

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1.0 DESCRIPTION
STRUCTURAL DESCRIPTION OF THE MACHINE (Fig. 1)
The Dragflow motor driven pumps are made of high quality materials and undergo severe controls before
leaving the factory.
They are essentially made up of a cylindrical pump casing 3inside of which is housed an electrical motor 4.
The upper part 2is completely water-tight, and contains the terminal box for connection to the electric motor,
the seal is guaranteed by the cover 1and by a series of seals.
Inside the oil housing 5is housed the group of seals and gaskets 11 that prevents the water from passing to
the motor.
On the main shaft 12, inside the casing 6there is a keyed impeller 7, made in high chrome content anti-wear
materials.
A wear plate 8, made with the same material, partially closes the impeller inlet.
Inside the strainer protection 9houses a cutter 10 that rotates and stirs the mixture of solids in the water to be
pumped.
Fig. 1

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2.0 TRANSPORT, ASSEMBLY AND DEMOLITION
Dragflow pumps are generally transported encased inside a crate to avoid damage to the pump or parts of it.
The crate is arranged for unloading with a fork-lift truck, whose capacity must be able to sustain the weight of
the pump ( see data sheet enclosed in this instructions handbook ) as shown in Fig. 2.
The pump is placed inside the crate as seen in Fig. 3, it must be freed from the packing and lifted with ropes
hooked to the appropriate lifting plate A.
Fig. 2 Fig. 3
INSTALLATION
1) Connect the delivery pipe.
-The delivery pipes must never form siphons (Fig. 5) pag. 6, to avoid problems due to the formation of
air pockets or deposits of solid material.
-Before connecting then pump to the electrical supply source, make sure that all the data on the rating
plate correspond ( voltage, power, absorption, etc. )
The pump is supplied with a supply cable already connected.
2) Connect the end of the wires to the control panel, taking care to respect the power supply phases and the
yellow/green ground wire that will be connected to the general grounding system of the plant.
-The user must guarantee the electrical conductivity between the machine and the main grounding
system of the plant.

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Fig. 4 Fig. 5
3) If the electric cable has not been requested proceed as follow (Fig. 6) pag. 7:
-Remove screws 6, lift upper cover 77.
-Remove screws 4and lift the cable lock 1.
-Slip the cable lock 1onto the electric cable and after that the seal composed by Kit 2A-2B-2C
alternating the iron washers with the rubber washers.
-Slip on the upper cover 77, taking care that the still completely insulated cable comes out sufficiently to
be connected to the terminal box 85.
-Tighten the screws 4until the cable 1lock rests on the upper cover 77, making sure that the composed
pack is sufficiently compressed to avoid water leaking in.
-Insert the seal 76 in its lodging.
-Connect the electric cables to the terminal box, including the yellow/green ground cable, to the screws
prepared for this purpose.
-Position upper cover 77 on the pump casing, making sure that the seal remains in its seat, to avoid
damage and as a result water leakage, tighten down the screws 6.
-Connect the other end of the cable as shown in the wiring diagram.
Warning: the pump supply cable must be a cable HO7RN-F type with rubber insulated flexible wires,
chloroprene-type 076 internal sheath in compliance with CEI 20-19- mark HAR with a cross-section for the
current absorption of the pump, or of equivalent type.

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Fig. 6
DISMANTLING
Before doing anything on the pump, be sure to disconnect the electrical supply and disconnect the delivery
pipes.
Warning: the machine that is considered completely useless must be removed from the department and
collected by the manufacturer or any other firm specialized in demolition. Remember that dismantling the
machine in your establishment will “produce” different materials ( metals, plastics, oil, etc. ) whose disposal
will be done in compliance with the legislative regulations in force in the state where the machine is found.

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3.0 STARTING AND OPERATION
STARTING
The pump has been created to pump suspended matter, even with solid parts, as long as water is always
present. It can be used for civil and industrial purposes, as long as conditions described in this manual are
observed.
ATTENTION
1) The control panel has a switch to which must be applied a device with a lock that
stops the use of the pump. The key will be given to someone in charge who will be
responsible for all the operations which he will supervise to avoid improper use of the
machine.
Check the direction of rotation: by passing very short current
impulses with the START/STOP switches placed on the control
panel, and check that the direction of rotation is that indicated
on the rating plate.
2) Immerse the pump in clear water and push the “START”
button.
3) If any priming problems should come up, stop the pump by
pressing the “STOP” button and wait for about 30 seconds,
leaving it immersed, until all the air has been eliminated.
4) Never operate the immersed pump without connecting the
pipes, because not sensing the load loss foreseen, the
electric motor could overshoot the maximum current absorption
(and in the absence of the suitable safety devices be completely
damaged). When only water is pumped, absorption should be 20% below that allowed.
If this is not the case, the load loss must be increased, in one of the following ways:
-by adding pipes
-by creating bottlenecks
-raising the discharge height
5) Slowly lower the pump until it comes into contact
with the material.
6) Check the percentage of solid in order not to
go over the maximum absorption limit.
7) When clean water is not available, but only
mud and other mixtures, check that the pump
does not go over the maximum absorption limit
indicated on the rating plate (Fig. 7); however, if
this does happen, create a further load loss,
acting as indicated at the preceding point 4.
8) Before stopping the pump, it is always a good
rule to pump water with very little solid in it, so
that the pipes are washed.
Fig. 7

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EMERGENCY SITUATIONS
The correct use of the machine excludes the possibility of emergencies happening during operation or during
cleaning and maintenance, unless the latter have not been done in compliance with this instructions manual.
a) In case of imminent danger of a mechanical origin, press, or have someone press, the emergency stop
button, and immediately afterwards switch off the general cutout switch or disconnect the plug. An
accurate search for the fault, or anomaly that caused the danger, must be carried out soon afterwards,
and once detected, see to resetting the operation of the machine and of the protection set-up.
If necessary, have DRAGFLOW S.r.l. Service or competent personnel from another firm carry out any
repairs or work.
b) If a current loss should be found, felt by touching metallic parts of the machine, switch off the general
cutout switch and have an expert electrical technician come in, or contact DRAGFLOW S.r.l. Service
for further details.
4.0 MAINTENANCE AND CLEANING
Warning: maintenance and cleaning of the machine must be done after having stopped the machine.
1) Check the tightness of the fastening screws every 50 hours of pump operation.
2) Remove the 2 (two) plugs marked by the labels GREASE, Fig. 8, and restore the grease with 50 grams
of it for each greaser, using a hand grease gun. Seals zone must be greased every 8 hours.
3) Every 150 hours check the clearance between the impeller 47 and the lower wear plate 48 is as
follows (see Fig. 9).
-keep the pump in a vertical position;
-dismantle the side strainer 53 by removing the screws in position 21;
-check that the clearance is not more than 1,5 mm, if it is wider proceed as follows:
-slacken of the fastening screws 52;
-take the wear plate 48 at a distance of about 1,5 mm from the impeller 47, by turning the adjustment
screws 81 and locknuts 83;
-check that it rotates freely;
-fasten both the locknuts 83, the adjustment screws 81 “PLUG”
and the fastening screws 52; -do not use-
-fit again the strainer 53 using the screws 21;
( tighten to about +/- 40N ).
“GREASE” “GREASE”
-greasing (red plug)
every 150 hours - -greasing
every 8 hours-
Thickness Blocking Adjusting
screws screws
Fig. 9

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4) For customers that work with particularly abrasive
materials having a very fine particle size, we advise
passing a jet of water under pressure, connecting it
to the prepared threaded connector indicated with
H2O (Fig. 10). The pressure must be greater than
that exerted by the pump to have continuous cleaning
of the area of the seals and so less wear.
It is compulsory to grease the area of the seals “OIL”
at the end of each shift or every 8 working hours, “WATER” topping up
use grease such as POLIMER 400 with LIQUILON. water with 5 Kg
5) Check the level and the deterioration of the oil washing
every 8 hours of operation by removing the plug
labelled “OIL” (Fig. 10). For a total oil change or
topping up, the following steps have to be taken:
a) It is good practice to empty the pump completely
of the remaining oil. The exhausted lubricant must
be disposed of in conformity with the laws in force
in the country where the machine is used, since its
dispersal in the ground will pollute the water beds.
Fig. 10
This is not necessary if the oil is simply topped up.
b) The pump must be placed in a horizontal position, keeping the plug marked “OIL” pointing up
(Fig. 11).
c) Remove the plug marked ”OIL”.
d) Top up until completely full or completely change the oil with about 5 Kg of oil having the
characteristics as in the table following.
Oil type
ISO
Density at
15/4 °C
Cst 40°C
Viscosity
Cst 100°C
E 50°C
I.V.
Flash point
V.A. °C
Pour point °C
EP320
320
0,900
330
25,8
24,0
95
240
- 17
e) Before closing the plug change the copper washer to prevent leaks and water seeping in.
If the oil is “milky” white color the seals must be replaced.
“OIL” oil filling
Top up in a horizontal position
Fig. 11

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REPLACING THE SEALS
-Completely empty the oil from the oil chamber.
-Remove the filter 53 (Fig. 12) by unscrewing the screws 21.
-Unscrew the cutter 54 by hitting it smartly in an anticlock-
wise direction as shown in Fig. 13; make sure the impeller
47 (Fig. 12) is blocked with an iron rod.
-Remove the connection 56 (Fig. 12a), then the nut 57 and
the spacer 58.
-Extract the flange on the suction side 50 (Fig. 12) after
having removed the screws 52. With the flange pos. 50
the lower wear plate 48 also will come down.
-Remove the casing 45 (Fig. 12) after having removed the
screws 42.
-Extract the impeller 47 using two levers “A” (Fig. 12).
If it sticks use an extractor, taking care not to damage the
threaded part of the motor shaft.
-Remove the key 59 (Fig. 12) and immediately after the
sleeve 20 (Fig. 14). To remove the upper wear plate 46
unscrew the screws 42a.
-Remove the seals housing 67 and 65 after having
removed the screws 78 with the ring 68.
-Change the seals 27 (n° 1) and 34 (n° 1) with their wear
sleeve 39 (n° 1) and the o-ring 40 (n° 1). Then change the
seals 66 (n° 1), 41 (n° 3) and 36 (n° 2), the two lower shaft
sleeve 31 and 20, the three o-rings “OR” 28, 23 and 26 as
shown in Fig. 14 taking care not to damage any spare.
Fig. 12a
Fig. 12
Fig. 13
54
N.B. First block
the impeller 47. Fig. 14

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-To reassemble follow the instructions in the reverse order keeping the pump in vertical position.
Remember to adjust the lower wear flange 48 (Fig. 9 pag. 9) as indicated in paragraph 2), before closing
the pump definitely.
Top up with new oil, according to the instructions of paragraph 5) pag. 10.
Once a year, each time that repairs have been carried out, when extraordinary events have
occurred, the user must check the state of the electrical, insulation and the continuity of the
protection circuit.
When parts of the electrical equipment are replaced, components with electrical characteristics as
similar as possible to the originals must be used.
The supply cable MUST be replaced as soon as damage to the external insulation is found.
PUTTING THE MACHINE OUT OF SERVICE
If for any reason whatsoever the machine should be temporarily placed out of service, it is important to
disconnect the electricity supply, clean it and cover it to protect it from dust.
To put it back into service again follow the instructions for starting up.
5.0 NOISE
The machine was designed and manufactured while at the same time keeping in due consideration air noise
hazards. The construction techniques used allow to limit the noise level within tolerable limits in compliance
with the Machine Directives 89/392, point 1.7.4.f:
-The pondered equivalent continuous acoustic pressure level is 56 dBA.
-The maximum pondered instantaneous acoustic pressure “C” is never above 63 Pa ( 130dB compared
to 20mPa ).
Air noise detection was effected by placing the probe two meters from the machine, along the whole perimeter
and at a meter from the floor. The noise was measured under vacuum. This because the machine itself does
not require any specific operation position fixed by the operator since it is normally immersed in water and
therefore the values are non-influencing.
The observations were done with a model HD9020K1 DELTA OHM PRECISION INTEGRATOR NOISE
METER in conformity with the: IEC651 class 1 standard
IEC804 class 1
IEC225 filters 1/3 octave
The instrument was calibrated with a DELTA OHM HH9101 calibrator conforming to the IEC942-1986 class 1.

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WIRING DIAGRAMS
EL 1204 A/B
The following wiring diagram is specified
for standard installation and excludes any
type of control signal or accessories.

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6.0 SAFETY
Introduction
Dragflow srl has designed and built the machine keeping in mind the results of a preventive and accurate
analysis of the risks connected to the use of the machine.
The protections and devices applied, therefore, represent the profuse commitment by the Dragflow S.r.l.
technicians to achieve the aim of safety sanctioned by the specific directives issued by the EEC. The
protections and devices are illustrated below with drawings.
Other instructions and information on the safety of the machine are contained in the paragraphs which deal
with the use, maintenance and repair.
All the organs in movement are segregated inside the pump structure.
The only rotating mechanical part is the agitator 54 ( Fig. 16 ), that for functional reasons cannot be protected
in any way.
In fact its specific function is that of cleaning the strainer 53 and stirring the solid bodies present in order to set
them in suspension in the liquid to be pumped (Fig. 16 ).
On the pump there is a warning plate ( Fig. 15 ) to remind us of this danger.
When about to operate the pump, keep clear of this rotating part in order to avoid
accidents.
The strainer 53 ( Fig. 16 ) is made according to the suction capacity of the pump, and does not allow the
passage of particles of over 60 mm diameter.
It is a good rule not to come close to the pump when it is immersed in water to avoid dangerous situations.
Do not open without having first
switched off.
On the pump there is a warning plate to remind us of this
danger ( Fig. 15 ). The upper part of the pump contains
the electrical terminal box of the motor.
Fig. 15 Fig. 16

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It is protected in a sealed chamber by means of a series of seals, that avoid water leakage.
The rated voltage present is that expressed on the rating plate ( Fig. 17 ).
When starting check:
-the correct connection of the phases;
-the correct direction of rotation of the motor;
The direction of rotation is expressed on the rating plate ( Fig. 17 ).
Fig. 17
INDIRECT CONTACT PROTECTION
All the metal masses are grounded with a yellow/green wire.
The user MUST GUARANTEE the electrical conductivity between the machine and the main grounding system
of the plant.
-The machine has an overall protection rating of IP68.
-The electrical tests carried out on the machine, in conformity with what is provided for by the
EN 60204-1/1992, point 20.1 and following, have had a positive outcome.

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SPARE PARTS
EL 1204 A/B

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