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Table of Contents
Summary of Contents for Drop BX-20-201
- Page 1 Operating Instructions SYSTEM: BX - 20- 201...
- Page 3 INTRODUCTION 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.
- Page 4 INTRODUCTION General recommendations • 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.
- Page 5 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.
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Page 6: Technical Features
TECHNICAL FEATURES • MAX. NOMINAL FLOW: 30 m /h (CLEAN WATER) • OPERATING FLOW: 16 m /h (RIVER WATER) • OPERATING FLOW: 12 m /h (CANAL WATER) • MAX. OPERATING PRESSURE: 8 bar • MIN. OPERATING PRESSURE: 2-2,5 bar • TOTAL FILTRATION AREA: 0.40 m •... - Page 7 CONTENTS DESCRIPTION QUANTITY SAND MEDIA FILTERS X2’’-20’’ 2 pcs SCREEN FILTER O3’’ (120-mesh) FLANGED 1 pcs COLLECTORS 2 pcs 3WAY BACKWASHING VALVES 2’’x2’’ FLANGED 2 pcs SOLENOID VALVES 24VAC 2 pcs CONTROLLER 2 STATION TYPE T2(AC) & DP 1 pcs METAL SUPPORT FOR CONTROLLER 1 pcs AIR RELIEF VALVE 1’’...
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Page 11: Installation
INSTALLATION Guidelines • Install the sand media filters X2’’-20’’ according to the design • Connect the metal flanges to the outlets of each sand media filter. • Connect the 3’’ outlet manifold downstream and place the metal support. • Connect the two nipples 2’’ to the inlet of each sand media filter. •... - Page 12 INSTALLATION Assemble on a level flat surface and place filters following design, connecting water inlet/outlets as the arrows indicate. Put water in the sand filters, filling them half way through. Sand should be softly introduced according to the amount indicated in each filter. Back flush 3 or 4 times : pressure should not be higher than 8 bar.
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Page 13: Operation
OPERATION Filtration The water enters from the top of the unit through the backwash valve and is being cleaned as it penetrates into the bed of sand where the solids are trapped and discharged from the bottom of the filter. To avoid filter medium (sand) being taken away, diffusers are fitted at the lower side of the filtration chamber. - Page 14 OPERATION Backwash: Upon receiving a command from the controller the backwash valve shuts off supply and opens drain. Filtrated water from the other media units flows on the reversed direction and flushes out the entrapped contaminants.
- Page 15 OPERATION Controller: The controller’s set-up depends on the local conditions and the quality of the water. Here by you will find our recommendation, which should be adapted accordingly. Periodic time: 4h (and/or at least once per day) Flush time: 120sec Dwell time: 15sec PD switch:...
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Page 16: Maintenance
MAINTENANCE Instructions Replace the sand when the amount of dirt that cannot be backflushed prevents the proper functioning of the filter (recommended every 2-3 years) • Open gently the plug at the bottom of the media filter and drain all the water •... -
Page 17: Problems And Solutions
PROBLEMS AND SOLUTIONS The first of all is to detect if the problem is electric or mechanic and if the header is new or it has been working before. Next we are going to explain the most common difficulties you can find, with the most appropiate solutions: 1) The cleaning programmer is out of order •... - Page 18 PROBLEMS AND SOLUTIONS 6) Losses of silica sand during backwashing. • Flow is to high. Decrease the flow. • Quantity of silica sand bigger than it needs. After a few cleanings(3-4) will become in normal position. • Install a ball valve at the drain pipe and throttle till the point you don’t have losses or install a pressure sustaining valve.
- Page 19 COLLECTING SYSTEM PAY ATTENTION TO THE DIFFUSSERS SLOT OPENING REGARDING PAY ATTENTION TO THE DIFFUSSERS SLOT OPENING REGARDING THE TYPE OF SILICA SAND YOU WILL USE. IF YOU WILL USE SILICA THE TYPE OF SILICA SAND YOU WILL USE. IF YOU WILL USE SILICA SAND TYPE 1.2 SAND TYPE 1.2- - 2.4mm YOU MUST USE DIFFUSERS WITH SLOT 2.4mm YOU MUST USE DIFFUSERS WITH SLOT...
- Page 20 CONTROLLER Please advise the attached documents of this manual at the end...
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Page 21: Solenoid Valves
SOLENOID VALVES TECHNICAL DATA 10 bar / 150 psi Maximum Operating Pressure: Minimum Operating Pressure: 0.5 bar / 8 psi End Connections: Female Threaded 1/8” BSP Orifice Size: 5.8 mm / 0.226” Manual Override: Auto, Open, Closed Voltage Available: 24V AC 50-60 Hz. DC Latching 9-40 volts ( 2 or 3 wire) DC Latching 6-40 volts ( 2 or 3 wire) Pulse Width: 20 –... - Page 22 3way BACKWASHING VALVES...
- Page 23 3way BACKWASHING VALVES...
- Page 24 3way BACKWASHING VALVES...
- Page 25 3way BACKWASHING VALVES...
- Page 26 NOTES …………………………………………………………………. …………………………………………………………………. …………………………………………………………………. …………………………………………………………………... …………………………………………………………………. …………………………………………………………………. …………………………………………………………………. …………………………………………………………………... …………………………………………………………………. …………………………………………………………………. …………………………………………………………………. …………………………………………………………………... …………………………………………………………………. …………………………………………………………………. …………………………………………………………………. …………………………………………………………………... …………………………………………………………………. …………………………………………………………………. …………………………………………………………………. …………………………………………………………………... …………………………………………………………………. …………………………………………………………………. …………………………………………………………………. …………………………………………………………………... …………………………………………………………………. …………………………………………………………………. …………………………………………………………………. …………………………………………………………………...
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