amiad DVF Manual

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Amiad Water Systems Ltd.
DVF - High Efficiency
Media Water Filtration System
Serial Numbers:
_____________________
Order number:
_____________________
Catalog number:
_____________________
Filtration degree:
_____________________
Year:
_____________________
Installation, Operation and Maintenance
Instructions
December 2019
Original Instructions
910101-001048

910101-001048 12/2019 Page 2 of 42
Amiad Water Systems Ltd.
DVF High Efficiency Media Water Filter
Disclaimer:
Copyright © 2017 Amiad Water Systems Ltd. All rights reserved.
The contents of this document, including without limitation all information and materials, images, illustrations, data, drawings, names and any other such
materials that appear in this document are the sole property of Amiad Water Systems Ltd., including any intellectual property rights, whether registered or
not, and all know-how contained or embodied therein. Amiad may alter, remove or change the Content without any further notice. You may not reproduce,
copy, modify, create derivative works from, sell or participate in any sale of, or exploit in any way, in whole or in part, any of this document or its content.
The confidential nature of and/or privilege in the file enclosed is not waived or lost as a result of a mistake or error in this file.If you received this file in
error, please notify Amiad immediately at in[email protected]m.
This document does not replace any certified drawing, procedure or information provided by Amiad in reference to a specific customer, site or project.
Amiad assumes that all users understand risks involved within this file and/or its attached materials.This document is given in good faith and is not intended
to impose any obligation to Amiad. While every effort has been made to ensure the information in this manual is accurate and complete, we would
appreciate if you can bring any errors or omissions to the knowledge of Amiad or consult Amiad experts or its authorized representatives if you have any
questions.
Amiad Water Systems Ltd. D.N. Galil Elyon 1, 1233500, Israel Tel: [phone] | Fax: [phone] Email: i[email protected]m

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Table of Contents
General Notes ...........................................................................................................................................................................4
General Safety Instructions ......................................................................................................................................................5
1. Installation........................................................................................................................................................................5
2. Commissioning .................................................................................................................................................................6
3. Operation and Control .....................................................................................................................................................6
4. Maintenance ....................................................................................................................................................................6
DVF Technical Data ..................................................................................................................................................................8
System Overview ......................................................................................................................................................................9
Filter Configuration...................................................................................................................................................................9
Filter Operation ......................................................................................................................................................................10
Air Scouring Process (Optional Add-on) .................................................................................................................................11
Filter Installation.....................................................................................................................................................................13
Client scope of supply.............................................................................................................................................................13
Making Pipework Connections ...............................................................................................................................................14
Making Electrical Connections................................................................................................................................................14
Media Filling Process ..............................................................................................................................................................15
Media Data .............................................................................................................................................................................16
Maintenance...........................................................................................................................................................................17
1. Leakage Test...................................................................................................................................................................17
2. First Operation ...............................................................................................................................................................17
3. Periodic Iinspection........................................................................................................................................................17
4. Monthly Maintenance....................................................................................................................................................17
5. Yearly Maintenance .......................................................................................................................................................18
6. Replacing the filter media ..............................................................................................................................................18
Parts Maintenance..................................................................................................................................................................19
1. Filter Vessel ....................................................................................................................................................................19
2. Filter Media – PEP ACTIVE (Activated Filter Media).......................................................................................................19
DVF 300 Filter – GA Drawing ..................................................................................................................................................21
DVF 300 Filter – Parts Drawings .............................................................................................................................................22
DVF 300 Filter – Parts List .......................................................................................................................................................23
DVF 600 Filter – GA Drawing ..................................................................................................................................................24
DVF 600 Filter - Parts Drawings ..............................................................................................................................................25
DVF 600 Filter – Parts List .......................................................................................................................................................23
DVF 900 Filter – GA Drawing ..................................................................................................................................................27
DVF 900 Filter – Parts Drawing ...............................................................................................................................................28
DVF 900 Filter – Parts List .......................................................................................................................................................29
DVF 1200 Filter – GA Drawing ................................................................................................................................................30
DVF 1200 Filter – Parts Drawing .............................................................................................................................................31
DVF 1200 Filter – Parts List .....................................................................................................................................................32
Basic Troubleshooting Flowchart............................................................................................................................................33
Amiad Limited Warranty.........................................................................................................................................................34
Annex A – Media Safety Data Sheet (7 pages)........................................................................................................................35

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General Notes
IMPORTANT
Prior to installation, operation, maintenance or any other type of action carried out on the filter, carefully read
the safety, installation and operation instructions.
This manual takes into account that the filter was ordered without a control system. If you have chosen to
provide any of the equipment yourselves, the instructions in this manual may serve as general guidance only.
Please refer to your equipment supplier for specific installation instructions.
It is the responsibility of the installer to read this manual carefully in its entirety before attempting to install /
operate the equipment. If you have any doubts as to the safe installation of this equipment, please contact our
technical engineer as detailed further in the manual.
Ensure you read and understand the Safety Notice supplied with this equipment and detailed in the Safety section
of this manual.
If you have any doubts, contact the manufacturer for advice.
Discharging wastewater to drain – it is the responsibility of the user to determine the legal discharge route for
contaminated water from the filter.
Electrical connections should be done in accordance with national standards and carried out by competent
persons only.
Amiad filtration products always operate as components in a larger system. It is essential for the system
designers, installers and operators to comply with all the relevant safety standards.
During installation, operation or maintenance of the filter, all conventional safety instructions should be observed
in order to avoid danger to the workers, the public or to property in the vicinity.
No change or modification to the equipment is permitted without a written notification given in advance by the
manufacturer or by its representative, on the manufacturer’s behalf.
Always observe standard safety instructions and good engineering practices whilst working in the filter’s vicinity.
Use the filter only for its intended purpose as designed by Amiad Water Systems. Any misuse of the filter may
lead to undesired damage and may affect your warranty coverage. Please consult with Amiad prior to any non-
regular use of this equipment.

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General Safety Instructions
1. Installation
General
Install the filter according to the detailed Installation Instructions provided with the filter by the manufacturer and
according to the description given in this manual.
Make sure to leave enough clearance to enable easy access for future treatments and safe maintenance
operations.
Make sure to have suitable lighting at the filter’s location to enable good visibility and safe maintenance.
Arrange suitable platforms, ladders and safety barriers to enable easy and safe access to the filter without
needing to climb on pipes and other equipment. Verify that any platform, barrier, ladder or other such equipment
is built, installed and used in accordance with the relevant local authorized standards.
Check and re-tighten all bolts during commissioning and after the first week of operation.
Use only appropriate standard tools and equipment operated by qualified operators when installing, operating
and maintaining the filter.
When installation is required in hazardous environment sitess, underground or high above ground, ensure that
the site design and the auxiliary equipment are appropriate and that installation procedures are carried out in
accordance with the relevant standards and regulations.
Ensure walking areas about the installation are slip resistant when wet.
Shipment and Transporting
Shipping and transporting the filter must be done in a safe and stable manner and in accordance with the relevant
standards and regulations.
For shipping, lifting and positioning the filter, use only approved lifting equipment, authorized employees and
contractors.
Pneumatics
Ensure that the compressed air supplied to the filter never exceeds the maximum designated pressure for the
filter. An air-pressure reduction valve should be installed on the compressed air supply line upstream of the
filter’s pneumatic inlet port.
Hydraulics
•Extra safety devices should be installed on hot water applications to avoid the danger of burns.
•The user should install a manual water cut-off valve next to the filter’s inlet port.
•In cases where the downstream piping network downstream of the filter is pressurized an additional manual water cut-off
valve should be installed next to the filter’s outlet port.
•The user should ensure that the system includes a pressure release / drainage valve to enable release of residual pressure
prior to any maintenance procedure performed on the filter.
•The user should ensure that the filter is never exposed to water pressure exceeding the maximum designated pressure for
this filter, if needed, a pressure reduction valve should be installed upstream of the filter’s water inlet port.
•The maximum working pressure indicated on the filter’s specifications table includes the pressure caused by fluid hammer
and pressure surge effects.
Civil Engineering
Ensure that the filter installation is done by the manufacturer’s qualified technicians.
Ensure that any civil engineering work at the installation site, such as construction, lifting, welding, etc. is
performed by qualified workers / technicians / contractors and in accordance with relevant local standards.

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While using lifting equipment, ensure that the filter or the lifted part is attached securely and in
a safe manner.
The product should be lifted from the integral lifting lugs ONLY when filter vessel is empty, using proper lifting
equipment according to local regulations.
Do not leave lifting equipment unsupervised. Avoid working below lifting equipment.
Wear a safety helmet while using lifting equipment.
Ensure that the flooring is sloped for drainage and to avoid accumulation of liquids.
2. Commissioning
•Carefully read the commissioning and the first start-up operation instructions prior to operating the filter.
•Perform the startup and first operation procedures exactly as described in this manual to achieve maximum performance and
smooth operation of the filter.
•Commissioning the filter should be performed by an authorized manufacturer’s technician only. Do not attempt to
commission the filter unaccompanied. This may lead to damage and may affect your warranty coverage.
3. Operation and Control
Do not operate the filter before carefully reading and becoming familiar with its operation instructions.
Observe the safety stickers on the filter and do not perform any operation other than those given in this manual.
Do not operate or use the filter for purposes other than its original design and operational envelope.
4. Maintenance
Servicing the filter should be performed by an authorized manufacturer’s technician only.
Before any maintenance or non-regular operation carefully read the following:
Disconnect the filter from the power supply and lock the main power switch.
Disconnect any compressed air supply, release the residual pressure and lock the pneumatics main valve.
Disconnect the filter from the water system by closing and securing the manual inlet valve. In cases where the
downstream piping network is pressurized, close and secure the manual outlet valve.
Release the residual water pressure by opening the pressure release / drainage valve.
Maximum water temperature: 60˚C. The filter is not designed for hot water applications.
Place warning signs around the work area as required by local standards and procedures.
Inspect the filter’s safety stickers and replace any that are damaged or faded.
Mechanical
Use only appropriate standard tools when working on the filter.
Always open and close valves slowly and gradually.
Remove grease and oily material residues to avoid slipping.
Before disconnecting the filter from the water supply, electricity and pneumatics and before releasing the filter’s
residual pressure DO NOT:
Loosen or unscrew bolts
Remove any protective cover
Open any service port flanges
Avoid splashing and water leakage to minimize slippage, electrification or damage to the equipment.

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While using lifting equipment, ensure that the filter or the lifted part is attached securely and in
a safe manner.
Do not leave lifted equipment unsupervised. Avoid working below lifted equipment.
Wear a safety helmet, goggles, gloves, and any other personal safety equipment required by local standards and
regulations.
Entering a filter must be done in accordance with relevant local safety instructions, standards and regulations for
working in hazardous environments.
Manual cleaning of the filter media using high water pressure or steam should be performed in accordance with
cleaning system instructions, local standards and regulations and without endangering the operator or the
vicinity.
Before returning to regular operation
Re-assemble any protective covers or protection mechanisms removed during service or maintenance operations.
Ensure that all the tools, ladders, lifting devices, etc. used during the maintenance procedures are removed from
the filter area and stored
In order to return the filter to regular operation, follow the First Start-up Operation instructions as detailed in
your user manual.
Filters used in potable water systems must be disinfected according to local water authority standards and
regulations before being returned to service.

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Description
D VF 300
D VF 600
D VF 900
D VF 1200
Filtration Performanc e
>1 μm Nominal
>1 μm Nominal
>1 μm Nominal
>1 μm Nominal
V es sel Diameter (mm) 300 600 900 1200
Empty Vessel Volume (liter) 80 350 810 1470
Filtration Fl o w ( m
3
/h) 1.4-3 4-12 10-28 20-50
Maximum Backwash Fl o w ( m
3
/h)
1.7
6
13
22
V es sel Material of Cons truction SST 304L SST 304LSST 304L SST 304L
V al v es Electric Actuated 24VAC Electric Actuated 24VAC Electric Actuated 24VAC Electric Actuated 24VAC
Media T ype Multi Level Graded PEP ACTIVE Multi Level Graded PEP ACTIVE Multi Level Graded PEP ACTIVE Multi Level Graded PEP ACTIVE
Control P anel
PLC, IP65
PLC, IP65
PLC, IP65
PLC, IP65
Control Panel Power Suppl y 240VAC, 1 Phase, 24VAC Contr ol 240VAC, 1 Phase, 24VAC Contr ol 240VAC, 1 Phase, 24VAC Contr ol 240VAC, 1 Phase, 24VAC Contr ol
Process Water Inlet Connection (1”) DN 25 ISOPN10 Flanged (1½”) DN 40 ISO PN10 Flanged (2”) DN 50 ISO PN10 Flanged (3”) DN 80 ISO PN10 Flanged
Process Water Outlet Connection (1”) DN 25 ISO PN10 Flanged (1½”) DN 40 ISO PN10 Flanged (2”) DN 50 ISO PN10 Flanged (3”) DN 80 ISO PN10 Flanged
Backwash Inlet Connection
(1”) DN 25 ISO PN10 Flanged
(1½”) DN 40 ISO PN10 Flanged
(2”) DN 50 ISO PN10 Flanged
(3”) DN 80 ISO PN10 Flanged
Backwash Outlet Connection (1”) DN 25 ISO PN10 Flanged (1½”) DN 40 ISO PN10 Flanged (2”) DN 50 ISO PN10 Flanged (3”) DN 80 ISOPN10 Flanged
Minimum Operating Pr es sur e (bar) 1 1 1 1
Maximum Operating Pr es sur e (bar) 5 7 7 7
Design T emper ature ( °C)
60
60
60
60
Required Installation Space (mm) L 700 x W 700 x H
1800
(2200 for maintenanc e)
L 1100 x W 800 x H 2010
(2500 for maintenanc e)
L 1500 x W 1100 x H 2175
(2750 for maintenanc e)
L 1700 x W 1450 x H 2620
(3370 for maintenanc e)
Approximate Filter Operational Weight (kg)
375
955
1195
3795
DVF Technical Data
el
L1 – Filter, Actuated V al v es, PEP ACTIVE Media, DP Switch, Contr oll er
L2 – Filter, Actuated
V al v es, PEP ACTIVE Media, DP Switch, Controller + Base Plate
L3 – Filter, Actuated
V al v es, PEP ACTIVE Media, DP Switch, Controller, Base Plate + 1 Pump ( Process or Backwash)
L4 – Filter, Actuated
V al v es, PEP ACTIVE Media, DP Switch, Controller, Base Plate + 2 Pumps (Process and Backwash)

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System Overview
The Amiad DVF High-Efficiency Water Filter is designed to remove suspended particulate from water down to 1
micron nominal in size at an efficiency of 90% (by mass) at the filter’s designated flow rate.
The unit operates at the 5-7 bar (refer to technical data table on pp.8) working pressure. It operates fully
automatically with its automatic backwash system. The backwash control is based on pressure differential and/or
timer control. The system’s backwash water flow for a single regeneration is specified in the Data Sheet.
This filter system consists of an SST 304 filter vessel rated according to BS EN13445.
The filter vessel comes complete with an internal stainless-steel support plate, into which a set of non-metallic
diffusers for media retention and the backwash distribution across the filter area are fixed.
This filter unit is supplied with multi-level graded glass.
The backwash period is adjustable depending on the nature of the contamination being removed.
Filter Configuration
The DVF is a patented filter system for water, which can remove particulate down to 1 micron nominal in size.
Each unit has a total of four valve connections – namely:
Process Inlet Valve V1 - This is the filter’s inlet connection for the dirty process water supply. The connection is located in
the upper part of the vessel with the entry point on the top lid. The water passes through the internal pipe equipped with
a Dual Vortex Generator incorporated into the internal inlet pipework.
Process Outlet Valve V2 - This is the filter’s outlet connection for the filtered (clean) water. The connection is
connected to the process system. We recommend that you install a flow control valve (full bore manual gate
valve) at this location to correctly set the flow for your process during commissioning. The valve can be supplied at
extra cost, if required.
V1 Process Inlet Valve
V4 Backwash Outlet Valve
V3 Backwash Inlet Valve
V2 Process Outlet Valve

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Backwash Inlet Valve V3 - This connection is located at the bottom of the vessel. This connection is USUALLY
connected to the clean backwash water supply. Backwash water can either come from a mains water supply or
from a pumped external water supply. In some cases the backwash water can be supplied via the inlet process
feed pump, however this requires a special pipe-work configuration.
Backwash Outlet Valve V4 - This is the outlet connection for the dirty backwash water. This connection is
connected to either a collection tank or to a suitable foul water drain. It is important that this pipe is unobscured
and only has a flow control valve. We recommend that you install a flow control valve (full bore manual gate valve)
at this location to control the backflow rate. The valve can be supplied at extra cost, if required.
Note: V2 and V3 can be reversed to match the plant requirements. If this is required, please consult Amiad Water
Systems as sometimes the PLC program needs to be amended.
Filter Operation
When the control system is powered up, the inlet and outlet valves (V1 and V2) are open and the backwash drain
and backwash inlet (V4 and V3) are closed. The process water is delivered into V1 via the system pressure. The
water feed is directed through the Dual Vortex Generator. The water is filtered by the media and exits the system
via V2 and on to the process system; The outlet gate valve (if used) controls the filter throughout.
The filter continues on-line filtration until backwash is initiated. This is usually done via a pressure differential
switch (supplied as part of the control package), a timer (adjustable through the controller), or manually, by
pressing the backwash button.
Once backwash is triggered by either of the above, V1 and V2 close – the filter will no longer be producing any
process water until the backwash cycle is complete.
The media bed is allowed to settle (this is called the “dwell time”) for about 1-1.5 minutes. This is to allow the
media suspended above the bed to settle before commencing the backwash cycle.
After the media has settled the backwash sequence begins.
V4 opens, shortly followed by V3 - this allows backwash water to be applied into the filter; this water is
distributed equally across the bed area and has the effect of fluidizing the glass media. The backwash water lifts
the lighter contamination from the media strata and flushes contamination from the system via the backwash
drain connection V4. This can be fed to a suitable foul drain or collected for further processing and water recovery.
The backwash gate valve (if used) will be adjusted on commissioning to ensure the bed is not over fluidised during
backwash, as in this event media could be sent to drain, reducing filtration efficiency and requiring more frequent
media top ups. After the backwash is complete, usually between 2-4 minutes (this is adjusted on commissioning to
suit the application and can be confirmed by visually checking that the backwash water is running clear), V3 and
V4 Close. After a dwell time of 30 seconds V1 and V2 open to process filtration again. This cycle is repeated as
required depending on loading.

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Air Scouring Process (optional add-on)
General Air Scour Benefits:
•Improve cleaning of media
•Minimize encrustation of media
•Reduce mudball formation
•Conserve backwash water
•Reduce wastewater discharge
•Reduce filter down time
•Save operator time & labor
•Extend periods between filter washes
•Increase filtration capacity
Incorporating Air Scour:
Air introduced anywhere below the steel plate floor (partition plate).
No air distribution piping is required.
An air supply pipe containing an isolation manual valve, regulator, pressure gauge and NRV allows the compressed air to
enter the bottom of each DVF filter unit below the distribution plate.
Design Guidelines for Air Scouring Supply:
•Consider the blower location, i.e. the height difference between the blower and the vessel air inlet. If the airline
is relatively long, calculate the dynamic head loss and take it in to account.
•An air valve MUST be installed to handle the blower air flow with the minimal hydraulic resistance (ARI D070P
model is recommended).
•A vacuum breaker MUST be installed on the drain line.
Process Description:
Partial Draining
This stage is designed to enable room on the upper part of the vessel for the air about to be introduced.
Close the inlet valve, outlet valve, BW inlet valve.
Open the drain outlet valve, allowing the top amount of water in the DVF to drain up to the drain pipe level. The
draining time depends on the installation.
Air Scouring
The air scouring duration is usually set for 10 minutes at the recommended velocity of ~70 m/hr per m² vessel area at
0.5-0.6 bars.
During this process, hold the draining valve open to ensure easy draining of the air out of the vessel.
Bear in mind that by doing so, you take the risk of carrying out some media in case of draining failure.

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By the end of this cycle, close the air supply valve to the filter and run the BW cycle.
DVF Scouring Design Table:
DVF
Model
Scouring
Pressure (Bar)
Scouring
Velocity (m/hr)
Vessel
Diameter (m)
Vessel
Area (m²)
Nominal Operation
Flow (m³/h)
DVF 300
0.5-0.6
70
0.3
0.07
5
DVF 600
0.5-0.6
70
0.6
0.28
20
DVF 900
0.5-0.6
70
0.9
0.64
45
DVF 1200
0.5-0.6
70
1.2
1.13
79

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Filter Installation
•Before lifting this unit we recommend a full risk assesment be conducted, taking into account the balance on
the unit and potential stress and damage, which may be caused to pipework by unsupported lifting.
•Place the filter in its final position ensuring the location is stable, level and suitable for the support of the
system’s operational weight. Installers should ensure suitable access is available to dismantle top flange of
the unit to carry out any media loading or maintenance that may be necessary. Check this by removing and
refitting top flange. (Filter is pre-loaded with media prior to dispatch).
•Check for all round access allowing at least 1m in all directions for ease of access. In restricted locations
please refer to factory before fixing in place in any areas that are adjacent to fixed objects. Once these
criteria are satisfied, secure the filter down.
•The filter may be located inside or outside, but if an outside location is chosen, care should be taken that the
filter is not subjected to ambient temperatures of below +2°C without heat tracing. If there is any risk of this,
you should consult with Amiad Water Systems.
•Connect inlet/outlet process pipe-work, backwash and drain to the unit as necessary and check all filter
connections for tightness, as fittings may become loose during transit. Remember not to overtighten the
connections.
•If the control panel doesn’t come pre-mounted, mount it adjacent to the filter unit. The control panel should
be located so as not to come into direct or sustained contact with water. The panel has an IP rating of IP65.
Client Scope of Supply
•An incoming electrical supply suitable for a control panel.
•A suitable pipe-work for connecting the filter via V1, V2, V3, V4.
•Note that pipe-work interface V4 must allow a flow under gravity without any obstructions (2-10m max).
•A gate valve on the outlet pipe-work to adjust the process flow (Downstream V2).
•A gate valve on the drain pipe-work to adjust the backwash flow (Downstream V4).
•An isolation valve on the inlet & outlet process supply is recommended as good engineering practice.
•A by-pass to allow for filter maintenance offline is a good engineering practice and strongly recommended.
•All pipe-work should be fully supported to ensure no undue mechanical stress is placed on the filter.

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Pipework Connections
•The waste /dirty backwash water V4 connection, should not create any back-pressure on the filter. The
drain pipe-work should be kept to a minimum of 2 meters and have a minimum of bends. It should not
rise above the filter outlet. The drain line should be of a minimum 2” diameter or larger and not exceed
10 meters in length. If a greater drain length is required, it should be done via a tundish arrangement
breaking any back pressure build up. A suitable valve (gate type) is required to allow flow regulation.
•Backwash water V3 supply to be connected to the backwash pump outlet. It is recommended that an
isolation valve be installed to facilitate valve maintenance/removal.
•Make sure that the HP (inlet) and LP (outlet) connections on the filter are connected to the differential
pressure switch.
Electrical Connections
•Electric wiring must be performed by an authorized electrician only, using standardized and approved
components.
•Install a lockable main power cut-off switch close to the control panel.
•If due to site constraints, the control panel is installed without a clear line of vision to the filter, an
additional lockable power disconnect cut-off switch should be installed near each filter unit.
•The filter should be installed in a manner in which the electrical components and/or the control panel are
protected from direct contact with water.
•Always ensure all connections to the panel are made with suitable cabling and glands. Under no
circumstances should the equipment be hooked up temporarily.
•Check all panel connections are tight and that no components have become dislodged in transit.
•Connect a suitable (per specification) incoming supply to the control panel.
•Connect to ground as per the diagram and isolate any earth bonding of the filter as required.

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Media Filling Process
Before filling the vessel, please follow these steps:
•Visually inspect the inside of the vessel to ensure all
the media retaining nozzles are present and fixed in
place.
•When performing this inspection:
oEnsure that you are wearing the correct PPE.
oLocate the top flange – see fig. A.
oNow carefully remove the bolts on the top flange.
This will release the blind flange and gasket. Care
should be taken not to damage the flange, flange
gasket, or drop the bolts inside the vessel.
oCarefully remove the flange and internal pipe-work,
which has the Dual Vortex Generator attached. This
will expose the nozzles for inspection. Make sure all
nozzles are in place.
oIf any nozzles are missing, please contact Amiad
Water Systems before proceeding further.
DO NOT FILL THE VESSEL IF NOZZLES ARE MISSING.
Make sure vessel interior is free from any debris
before following the media filling procedure below.
•It is strongly recommended to use correct PPE during
media installation. (See media data sheets which can
be found on the bags, and further in this document).
oFirst ensure that the valves on the backwash inlet
V3 and process outlet V2 are closed.
oNow, via the top flange, fill half the vessel with clean, fresh water. This is to ensure no damage occurs to the
backwash nozzles located within the vessel base.
oLoad the base media in the correct order (beginning with the largest size first – i.e. Grade 3) with the applicable
quantities, as shown in the Media Data table below. The depth guide is in mm and given as a guideline only.
oLevel each layer before moving on to the next layer.
oOnce the loading is complete, the media should be within approximately 20mm of the base of the vortex
generator. Check this with the length of the vortex inlet pipe as you are filling the vessel to avoid overfilling.
oPlace the top flange with the gasket back onto the vessel in the same orientation as it was removed,
remembering to securely screw the feed pipe via union.
•The media bags are marked for the grade size.
Fig. A.
Top
Flange
V1 Process Inlet
Valve
V4 Backwash
Outlet Valve
V3 Backwash
Inlet Valve
V2 Process
Outlet Valve

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Media Data
MEDIA
DVF 300 DVF 600 DVF 900 DVF 1200
Grade 0
Depth (mm)
319
337
296
300
Weight (kg)
30
125
250
450
# of Bags
(5 bags)
(10 bags)
(18 bags)
Grade 1
Depth (mm)
181
212
251
212
Weight (kg)
16
75
200
300
# of Bags
(3 Bags)
(8 Bags)
(12 Bags)
Grade 2
Depth (mm)
219
200
287
305
Weight (kg)
19
75
225
425
# of Bags
(3 Bags)
(9 Bags)
(17 Bags)
Grade 3
Depth (mm)
232
218
161
210
Weight (kg)
20
75
125
290
# of Bags
(3 Bags)
(5 Bags)
(12 Bags)
Total Bed Weight (kg)
85
350
800
1465
Total Bed Height (mm)
951
978
996
1025
Media configurations can vary according to process.

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Maintenance
1. Leakage Test
This process should be performed for each of the filter vessels, after installation onsite, prior to media loading.
1. Open the filter's upper service port and ensure that all nozzles are in place and none are missing or displaced.
2. Close the filter's service ports.
3. Ensure that all the filter valves are closed.
4. Open the inlet valve (V1) and let water flow into the filter.
5. Apply water pressure gradually up to the operation DVF filter pressure.
Attention - maximum pressure allowed is 7 bar (5 bar for DVF 300)!
6. Check the valves' connections and manifolds for leaks and repair any leak found.
2. First Operation
1. Open the main raw water supply valve (V1) and let water flow into the system.
2. Perform a forced flush cycle. Flush the filter until the backwash outlet (V4) water is clean.
Note: Ensure minimal backwash flowrate according to the technical data table (pp.8).
3. Switch to Auto operation mode
4. Adjust all operational setpoints in the control system (as per control philosophy).
Recommendations: clean DP ~0.3 bar; Backwash trigger DP ~0.8 bar.
3. Periodic Inspection
1. Check for leaks from connections and fittings.
If leaks are found, repair them and re-secure the connections if required.
2. Manually start and complete a backwash cycle.
3. When the filter will not be in use for a long period, it can be drained after disinfecting,and left dry until used
again.
4. In environments where freezing conditions occur, open all filter covers and drain the water totally out of the
filtration system. After the filter is drained, close the upper covers.
4. Monthly Maintenance
1. Visually inspect the outer vessel surface for early signs of corrosion.
2. Visually inspect the gasket sealing areas for signs of water leakage.

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5. Yearly Maintenance
1. Inspect vessel and repair any damage immediately.
2. Inspect the media:
If the filtering media is no longer working effectively (short service time, too much coagulation, rubbed down),
replace the PEP ACTIVE media according to instructions in section Media Filling Process.
•Open the service cover on the side of the filter and drain all the water.
•Remove the filter media through the service hole on the side of the filter.
•Thoroughly clean the inside of the filter with clean water.
•Inspect the filter mushrooms and the double bottom.
•Carefully close the service covers on the side.
•Fill the filter media through the filling hole (top lid) and continue to follow the instructions in the section Media
Filling Process.
6. Replacing the filter media
1. Replace the filter media once it is no longer effective.
2. Close the water supply to the filter and release the pressure in the filter before opening the filling hatch.
3. Follow the instructions in the section Media Filling Process.

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Parts Maintenance
1. Filter Vessel
Weekly Maintenance
•None
Monthly Maintenance
•Visual inspection of outer vessel surface for early signs of corrosion.
•Visual inspection of gasket sealing areas for signs of water leakage.
Yearly Maintenance
•Removal of upper hatches for media inspection. Replace tri- clamp seal and cover gasket.
•Inspect condition of securing bolts, replace as required.
2. Filter Media – PEP ACTIVE*(Activated Filter Media)
Weekly Maintenance
•Check and log differential pressure.
Monthly Maintenance
•Perform a manual backwash cycle and visually inspect drain for media carry.
Yearly Maintenance
•Removal of upper hatches for media inspection.
•Perform a media sanitation / disinfection if required (solution of hypochlorite @ 5%).
•Top up the upper media grade as needed.
•Replacement of media & nozzles recommended every 5/6 years.
*PEP ACTIVE is a private label of AFM media manufactured by Dryden Aqua

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DVF Filter – P&ID Drawing