vacuum cleaners
TRANSCRIPT
Suction cleanersSuction cleanersSelectives & fundamentalsSelectives & fundamentals
SUCTION CLEANERSSUCTION CLEANERS
(Also popularly known as vacuum Cleaners)(Also popularly known as vacuum Cleaners)
WHAT IS VACUUM ??WHAT IS VACUUM ??
Vacuum is space which has no matter in it, ie any space Vacuum is space which has no matter in it, ie any space in which pressure is lower than atmosphere pressurein which pressure is lower than atmosphere pressureAtmospheric pressure is –Atmospheric pressure is –
1 kg/sq.cm1 kg/sq.cm :1 bar :760 nun of mercury:1 bar :760 nun of mercury :10,000 mm of water :1,01.350 pascal:10,000 mm of water :1,01.350 pascal
Principle utilized by Vacuum CleanerPrinciple utilized by Vacuum Cleaner__________________________________________________________________________________________________________________________
All liquids & gases flow from high All liquids & gases flow from high pressure pressure area to low pressure area.area to low pressure area.
Common Example Common Example : : Drinking thru a strawDrinking thru a straw
Volume of airVolume of airIt is the quantity of air in liters for a given unit of time, which enters the vacuum It is the quantity of air in liters for a given unit of time, which enters the vacuum cleaner or which the fans exhaust.cleaner or which the fans exhaust.1000 liters1000 liters : : 1 cu.m.1 cu.m.3600 seconds :3600 seconds : 1 hour1 houre.g. 35 liters/s = 126 cu.m/lh = 0.277 liters/se.g. 35 liters/s = 126 cu.m/lh = 0.277 liters/s
OUR PRODUCTS RANGEOUR PRODUCTS RANGE
Single Phase – commercial & Industrial
Three Phase-Industrial
Centra-Vac Solutions
Features to understand in a Suction CleanerFeatures to understand in a Suction Cleaner__________________________________________________________________________________________________________________________
MOTOR
FILTER
BODY
ACCESSORY
MOBILITY
WEIGHT
CONTAINER CAPACITY
SOUND LEVEL
AIRFLOW
Vacuum Cleaner from inside
Container
Dust bag
Main filter
Motor pre-filterFine exhaust filterExhaust diffuser
Motor Top Float System HEPA Solution
TYPES OF SUCTION CLEANERTYPES OF SUCTION CLEANER__________________________________________________________________________________________________________________________
BY CAPABILITY DRY TYPE
WET & DRY TYPE
BY CAPACITY COMMERCIAL (Mobile)
INDUSTRIAL (Mobile)
FIXED INSTALLATION
BY POWER SINGLE PHASE (230 V)
THREE PHASE (440 V)
BY DESIGN CANNISTER TYPE
UPRIGHT TYPE
Explanation of Parameters
MOTOR
COOLING DIRECT - MOTOR COOLED BY THE MAIN AIR FLOW
BYPASS - MOTOR COOLED BY A SEPARATE COOLING AIR FLOW ISOLATED FROM WORKING AIR
AIR FLOW AMOUNT OF AIR PASSING THROUGH THE MACHINE IN LITERS PER
SECOND MEASURED. AT STANDARD MEAN SEA LEVEL CONDITIONS
SUCTION
POWER THE POWER -CALCULATED FROM AIR FLOW RATE AND SUCTION OR VACUUM CREATED BY THE MACHINE. THIS INDICATES THE REAL POWER BEING YIELDED BY THE MACHINE FOR VACUUM CLEANING.
VACUUM THE AMOUNT OF NEGATIVE ATMOSPHERIC PRESSURE PRODUCED BY THE MACHINE. THIS IS MEASURED IN mm OF W\TER GAUGE AND IS MAXIMUM AT CLOSED AIR INTAKE
SOUND LEVEL THIS IS A MEASURE OF ANNOYING SOUND GIVEN BY MACHINE. THIS lS MEASURED BY SOUND LEVEL METER IN DECIBELS. THE WEIGHTAGE CURVE 8A. GIVES \ALUES CLOSEST TO THE HUMAN EAR. HENCE IT IS GENERALLY GIVEN IN dB(A). IT IS
MEASURED AT 1m AWAY FROM THE MACHINE.
DUST CAPACITY IT IS THE VOLUME OF DUST RECEPTACLE OF THE VACUUM CLEANER MEASURED AS PER ASTM-F-888
MOTOR PROTECTION CLASS
ELECTRICAL INSULATION CLASS AS PER IEC-335-1
CLASS I : GROUNDED
CLASS II : DOUBLE INSULATED
VOLTAGE, V SUPPY VOLTAGE APPLIED TO THE VACUUM CLEANER. THE PERMISSIBLE FLUCTUATIONS ARE +/- 10%
FREQUENCY, Hz SINGLE PHASE MOTORS RUN EQUALLY WELL ON
BOTH 50 Hz: AND 60 Hz: POWER SUPPLY.
FOR 3 -PHASE MOTORS, MOTOR SPEED CHANGES WITH FREQUENCY. HENCE THEY MUST BE
DESIGNED FOR EITHER 50 Hz:' OR 60 Hz
RATED POWER, W AN INTERNATIONALLY ACCEPTED AVERAGE VALUE FOR POWER CONSUMPTION UNDER NORMAL OPERATION AS DEFINED IN IEC-335-2-2
MAX. POWER, W THE MAXIMUM POWER CONSUMPTION WHICH OCCURS WITH FULL OPEN AIR INLET AS DEFINED IN IEC-335-2-2
MOTOR PROTECTION GRADE
MECHANICAL/DUST AND HUMIDITY /WA.TER PROTECTION ACCORDING TO IP SYSTEM AS DEFINED IN IEC-529. IP STANDS
FOR INGRESS PROTECTION
Transport velocity and capture: Velocity is the number of meters a particle travels in a unit of time. In suction,
it is decided by the volume of air and the diameter of the hose a') velocity is volume of air divided by the area of hose.
Capture velocity: This is the velocity of the air that is needed at the inlet or at the nozzle, to capture the product and carry it away. It will depend on:
the size of particle the specific gravity the charge the particle catties e.g. III grinders or mills, the loose particles have a speed. The capture
velocity at the nozzle has to be greater in order to suck them in. Selection of insufficient velocity will cause the product to settle out on the
interior of the piping system and clog it.
For ordinary dust, we shall use 20-21 meters/second and for heavy dust (Cement, Metal shavings) up to 35 meters/second.
Calculating hose size :
How to calculate the hose size:- e.g.: The machine has the air flow rate of 68 liters/second we know that Velocity = Volume / Area. Therefore, Area = Volume / Velocity = 0.0019 sq. meter. Area of a circle = 3.14 x sq. of radius Therefore, radius = sq. root of (Area x 3.14) = 0.0248 meter = 24.87 mm We multiply the radius by 2 to get the diameter Hence, the diameter is 49.7mm i.e.50mm Hence, the machine to use will be GS 83 or GB 733 or any
higher machine.
Industrial Vacuum Cleaners
Selection of Vacuum Cleaners
Single-phase for flexible and in-expensive cleaning The single-phase motor driven machines are designed for flexibility and are easy to maneuver. They are primarily used for occasional cleaning of manufacturing areas
or for overhead cleaning. The single-phase motors are normally fitted with carbon brushes. Single-phase
motors are also available in a brushless version for durability and explosion-proof applications.
Three-phase for continuous operation The three-phase machines are designed for continuous use e.g. for process-
integrated cleaning or fixed installations with several inlets in use at the same time.
The three-phase machines can be subdivided into side-channel blowers where the vacuum fan is mounted directly on the motor, and turbine motors where the motor
and the fan units are connected via a drive belt.
Side-channel blower or turbine machine?
Choosing a machine equipped with side-channel blower or turbine depends on the cleaning task at hand.
A side-channel blower has a direct relation between vacuum/airflow and rated power (kW)
A turbine solution provides you with the ability to change the ratio between vacuum and airflow independent from the rated power by changing the
combination of turbine and motor.
Example 1: light dust requires high airflow and less vacuum with a turbine solution - 4,0 kW rated power (197 l/sec 14,7 Kpa)
with a side-channel solution - 7,5 kW rated power (205 l/sec 27,5 Kpa)
Example 2: heavy debris requires less airflow and high vacuum with a turbine solution - 3,0 kW rated power (87 l/sec 22,5 Kpa)
with a side-channel solution - 4,0 kW rated power (100 l/sec 27,0 Kpa)
ADVANTAGES OF USING SUCTION CLEANER
____________________________________________ Ease of cleaning One time cleaning with no displacement of dust
from one place to another Removal of fine & embedded dust particles.
Friendly towards the operator
Enhanced company image.
Can be utilized for material retrieval & save wastages
LOTS OF KNOWLEDGE
WITH LOTS MORE TO LEARN
THESE ARE THE TOOLSTHESE ARE THE TOOLS
WHICH WILL HELP US EARNWHICH WILL HELP US EARN
BEST WAY TO GET STARTED
IS TO REVISE,
PRACTISE,
DEMONSTRATE