EBS FILTER SERIES

EBS FILTER SERIES

The largest automatic self-cleaning filter for fine filtration

For flow rates up to 4000 m³/h Fine filtration degrees : 800 - 10 micron Large filtration area of up to 40,000 cm²

HOW THE EBS FILTERS WORK

The EBS is an automatic filter, with a self-cleaning mechanism driven by an electric motor. The EBS is designed to work with various types of screens in filtration degrees from 800 to 10 micron, and is available in 8" to 24" inlet/outlet diameter.

Filtering process

Raw water flows into the filter through the cylindrical filter element from the inside-out, causing particles to accumulate on the inside screen surface which causes the development of a ”filter cake”. The accumulation of the filter cake causes pressure differential to develop between the filter inlet and outlet.

A pressure differential switch senses the pressure differential across the screen and when it reaches a preset value, the cleaning mechanism is operated.

Cleaning process

The EBS begins the self-cleaning process when the pressure differential across the screen reaches a preset value or a pre-determined lapse of time. Cleaning of the filter's fine screen is carried out by the suction scanner which is a motor driven assembly that rotates while also moving linearly. It consists of a central tube with tubular nozzles equally spaced along the length of the central tube. An exhaust flush valve connects the internal cavity of the suction scanner to atmospheric pressure outside the filter body. By opening the exhaust valve, the differential pressure between the water inside the filter and the atmosphere outside the filter creates high suction forces at the openings of each of the suction scanner nozzles.

This suction force causes water to flow backwards through a small area of screen in front of each nozzle, pulling the filter cake off the screen and sucking it into the suction scanner and out through the exhaust valve to waste.
The driving mechanism rotates the suction scanner in a slow, controlled motion. The cleaning cycle is completed in approx. 30 seconds. During this time the nozzles cover 100% of the screen removing the filter cake from the entire screen surface. During the self-cleaning cycle, filtered water continues to flow downstream of the filter.

Control system

The EBS filter is equipped with a pressure differential switch that transmits an electric signal to the electronic control board, which initiates the flush cycle. A solenoid operates the exhaust valve by means of a hydraulic command or compressed air.
The filter operation and cleaning cycle is controlled and monitored by a Programmable Logic Control (PLC). The PLC allows maximum flexibility in control options and has many features that can be incorporated per customer's needs.

The MegaEBS

The MegaEBS filter consists of four EBS screen elements and cleaning mechanisms within one housing. An integral control panel allows for sequential operation of the cleaning mechanisms, one-by-one, in pairs, or all four units simultaneously. The Mega EBS is an excellent solution for applications with space limitations or when limited number of filter units is required.

Filter type	EBS	MegaEBS
Max. flow rate (m³/h)	1.200	4.000	consult manufacturer for optimum flow depending on filtration degree & water quality
Min. working pressure bar (bar)	2	2	pressure requirements depend on multiple factors, please consult manufacturer
Max. working pressure (bar)	10	10	16 bar upon request
Filter area (cm²)	10.000	40.000
inlet/outlet diameter (mm)	200 - 400	400 - 600	flange standards upon request
Max. working temp (°C)	60	60	95°C upon request
Weight (Av.) empty (kg)	350	2.250
Weight (Av.) (lit)	200	2.800

Flushing data
Exhaust valve (mm)	80 (3")	4 x 80 (3")
Wasted water per cycle (lit)	500	2.000	at 2 bar
Min. flow for flushing (m³/h)	50	200 - 50	at 2 bar
Flushing cycle time (sec.)	35 - 40	30 - 120	at 50 Hz

Control and electricity
Electric motor (HP)	1/2	4 x 1/2	20/24 Gear output RPM
Control voltage (V)	24 VAC
Rated operation voltage	3 ph, 380/400 V 50/60 Hz

Construction materials *
Filter housing and lid	Epoxy coated carbon steel 37-2
Screens	Four-layer weave wire stainless steel 316L
Cleaning mechanism	Stainless steel 316L, Acetal
Exhaust valve	Epoxy-coated cast iron, Natural rubber
Seals	Synthetic rubber, Teflon
Control	Aluminium, Brass, Stainless steel, Nylon, PVC
*Filtermat offers a variety of construction materials. Consult manufacturer for specifications.