Af Series Lake Water Back Flushing Filter

AF Series Bernoulli Effect Self-Cleaning Filter
 
Brief Introduction
The AF series Bernoulli self-cleaning Filter (AF Filter for short) is designed for continuous filtration of water in pressurized systems. AF Filter removes debris and particles from natural water sources such as sea water or river water. The AF filter works in BERNOULLI principle, which leads to the simple and highly reliable filtering operation.
 
BERNOULLI CLEANING PRINCIPLE  
The filter element of AF filter is cleaned by the cleaning disc mounted on the pneumatic cylinder rod. When the cleaning action triggered, the disc moves into the filter element and water passes through the gap between the disc and the filter element. Flow velocity increases around the disc and the static pressure around the disc decreases because of the Bernoulli principle. Around the disc edge, the vacuum effect of lower static pressure makes the filtered water back-flush the filter element surface
 
 
TECHNICAL FEATURES AND ADVANTAGES
Simple and reliable structure with only two moving parts (Clean disc and discharging valve)
Non-contact cleaning, no particle extrusion out of the filter element, efficient filtration
Low and consistant pressure drop (even <0.011MPa) both when clean and dirty
Very low working pressure requirement down to 0.03MPa
Wide flow rate range from 30 to 7000 m3/ h in only one filter unit
No filtration interruption when self-cleaning
Filtration sizes from 0.1 to 2 mm
Easy installation in horizontal or vertical position
 
TYPICAL APPLICATION FIELDS
1,Typical applications: water treatment, circulating cooling system, heat exchanger protection, spraying nozzle protection, ballast water treatment system.
2,Applicable liquids: underground water, sea water, lake water, river water, circulating cooling water,sewage water, process water, cleaning water The AF series Bernoulli self-cleaning Filter (AF Filter for short) is designed for continuous filtration of water in pressurized systems. AF Filter removes debris and particles from natural water sources such as sea water or river water. The AF filter works in BERNOULLI principle, which leads to the simple and highly reliable filtering operation.
 
THE COMPLETE AF WORKING STAGES
 
 
Stage 1.Filtration in the upper 2/3 screen In the lower 1/3 reverse flow takes place as a result of high flow velocities in the filter screen entrance. This causes no impurity deposit.
 
 
 
 
Stage 2. Filtration in progress The screen starts to gradually get clogged from top to down. Filtration also begins in the 1/3 screen. Reverse flow in the screen entrance area still takes place
 
 
 
Stage 3. Filtration and self-cleaning action triggered 2/3 upper screen gets almost clogged Filtration starts on the whole screen surface The self-cleaning action is triggered by differential pressure
 
 
Stage 4. Cleaning and filtration The cleaning discharging valve opened The clean disc keeps still in the initial position The coarse particles are easily washed out of the filter The lower 1/3 screen also takes part in the filtration
 
 
Stage 5. Cleaning and continuous filtration The cleaning disc moves down into the screen (down to 2/3) Cleaning takes palce on the screen surface around the disc because of the BERNOULLI principle
 
 
Stage 6. the disc moves up and down and cleaned the upper 2/3 screen Reverse flow takes place and cleans the lower 1/3 screen Particlesare flushed out. The whole screen is cleaned
Specification
 

FILTER TYPE	FILTER BODY	DESIGN PRESSURE	MAX OPERATING TEMPERATURE
G Series	GRP(polyester)	10/6 bar g	60oC
S Series	316L/304	10 bar g	80oC
C Series	CS+Coatings	10 bar g	80oC

 
FILTRATION: 0.2-2.0mm
MAX PARTICLE SIZE: 40mm
MIN SYSTEM PRESSURE: 0.3 bar g
 
MATERIAL
BODY: As indicated above
BASKET: 316L, Titanium, Super Duplex
DRIVING UNIT: AISI 316
PISTON SEAL: Polyurethane
FLUSHING VALVE: PVC or AISI 316/304
 
CONTROLS: Pneumatic, 6 bar air pressure
Voltage 220V, 50/60Hz
 
FUNCTIONS:
Electronic control
Differential pressure sensor
Timer controlled override
Double supervision system
 
CONTACTS FOR COMPUTER SUPERVISION:
Filter in operation
Flushing
 
 
 
For more information,please check : www.livicfilter.com