Drop BX-20-201 User manual

Operating Instructions
SYSTEM: BX - 20- 201

DROP appreciates you for the purchase of its
products and they inform you that as much in its
production as in its design they have put all its care.
Detailed reading of this manual will help you in the
system installation and good operation for many
years. Do not forget to give to the end user this
information when making the filtrate system starting,
in problem avoidance and for the correct use of the
systems.
All the systems need of a periodic maintenance,
revisions, consumable replacements, in function of the
qualities of the waters and of the work conditions. A
competent technician should advise the selection of
the system and filtering equipment, as well as its
measurement
design
and
operation
conditions
.
The
INTRODUCTION
measurement
design
and
operation
conditions
.
The
qualities of the waters can vary with the step of the
time and consequently the filters can work in a
different way.
Any suggestion of you, about our products or about
this manual, will be very received and rewarded in its
case.
In case of doubt, consult with your supplier..

General recommendations
INTRODUCTION
• In small facilities, with few filter elements, it is
recommendable to install a sustaining pressure
valve under the filtrate system, with the purpose of
guaranteeing sufficient pressure for the backwash
process of. This valve must go provided with a
control mechanism (electrical
or hydraulic) that manages its total opening during
the filtration process.
• In any case, whenever the installation does not
allow to maintain necessary the sufficient pressure
for the backwash one, it is advisable to place a
manual valve when coming out (of butterfly),
regulated properly to stabilize the pressure.
• With the purpose of eliminating the air that
could arrive at the filter elements, he is
recommendable to place a vent valve in an
advisable place of the system.
•
In
order
to
avoid
the
inverse
flow,
from
the
•
In
order
to
avoid
the
inverse
flow,
from
the
irrigation towards the filtrate, before a
shutdown of the pumping system, the
installation of a retention valve is advisable, in
cases in that the height waters down is greater
than where the
pressure system is located.
• With the purpose of being able to eliminate
the water of the system for operations of
maintenance one is due to have a purge valve.
• The use of satellites filters in the water
takings of the irrigation sectors
eliminates risks of cloggings of emitters.
These cloggings could be caused by the
grain formation by agglutinations of
dissolved substances that precipitate
throughout the conduction. Also risk of
clogging by a possible accidental
breakage of the conduction is run.
• As protection against overpressures
safety valves can be installed in the
system.

FILTERING MEDIA
Media
Data
:
Media
Data
:
Two factors describe the media used in the filter “Uniformity Coefficient” is an
index of the variability of the particle sizes in a sample. Sand particles must be as
uniform as possible for better control of the filtration since only particles large
enough to clog emitters should be retained of the filter. Grading in size from fine to
coarse causes premature clogging of the filter, since even small particles, which
can be tolerated from the emitters are retained from the non-uniform pores of the
media. Uniformity coefficient is expressed by the ratio: (size of the screen opening
which will pass 60% of the filter sand) / (size of the screen opening which will pass
10% of the same filter sand).
“Mean Effective sand Size” is and indicator of the particle size that will be
removed by
the media. It is expressed by the size of the screen opening, which will pass 10%
of the
sand sample.

TECHNICAL FEATURES
•MAX. NOMINAL FLOW: 30 m3/h (CLEAN WATER)
•OPERATING FLOW: 16 m3/h (RIVER WATER)
•OPERATING FLOW: 12 m3/h (CANAL WATER)
•MAX. OPERATING PRESSURE: 8 bar
•MIN. OPERATING PRESSURE: 2-2,5 bar
•TOTAL FILTRATION AREA: 0.40 m2
•TOTAL REQUIRED SILICA SAND: 260 Kg ( 10 BAGS)
•INLET – OUTLET: 3’’ (DN80) flanged
•FLANGES: DIN 2576
•THREADS: BSP
•Coating: Polyester electrostatic painting-oven baked

CONTENTS
A/A DESCRIPTION QUANTITY
1SAND MEDIA FILTERS X2’’-20’’ 2 pcs
2SCREEN FILTER O3’’ (120-mesh) FLANGED 1 pcs
3COLLECTORS 2 pcs
43WAY BACKWASHING VALVES 2’’x2’’ FLANGED 2 pcs
5SOLENOID VALVES 24VAC 2 pcs
6CONTROLLER 2 STATION TYPE T2(AC) & DP 1 pcs
7METAL SUPPORT FOR CONTROLLER 1 pcs
8AIR RELIEF VALVE 1’’ DOUBLE ACTION 1 pcs
11 SEALS 2’’ 4 pcs
12 SEALS 3’’ 1 pcs
13 BOLTS 5/8’’x60 + NUTS 20 pcs
14 METAL FLANGES MALE THREADED 2’’ 4 pcs
15
RAKOR PVC
Φ
63x2’’
2 pcs
15
RAKOR PVC
Φ
63x2’’
2 pcs
16 TEE PVC Φ63 1 pcs
17 ELBOW 90ΟPVC Φ63 1 pcs
18 DRAIN PIPE Φ63 /6atm 1m
19 PRESSURE GAUGE 0-10BAR (GLYCERIN) 2 pcs
20 PLASTIC FILTER 1’’ 1 pcs
21 NIPPLE 2’’ 2 pcs
22 METAL SUPPORT BASE 1 pcs
23
24
25
26