Disc Type Diffuser

Fine Bubble Membrane Air Diffuser
Our membrane air diffuser is fine pore flexible membrane diffusers that provide operational flexibility with maximum oxygen transfer efficiency. Alternate materials of constructions are available for special applications. Our disc diffuser units are available with premium quality EPDM membranes. Multiple perforation patterns are available to optimize system performance.
We manufactures disc diffusers with compression molded membranes. Standard materials are EPDM and fluoroelastomer layered EPDM. Compression molding ensures a diffuser with even specific gravity and uniform tear resistance. The tear resistance of a compression molded part is multidirectional, which is typically not found in injection molded unidirectional parts. Our manufacturing experience ensure emulsifying fats cannot leech plasticizer and cause shrinkage and increase hardness, nor are our membranes at risk of flexure failure


Technical Specification:
 
Technical Data
KAD-250
KAD-320
Materials
High grade EPDM / Silicone
High grade EPDM / Silicone
Membrane with precision holes
ABS
ABS
Diameter
10 Inch (250mm)
12.5 Inch (320mm)
Size of Bubble
1-3 mm
1-3 mm
Connection
3/4 Inch PT
3/4 Inch PT
Air Flow
1.0 – 5 cfm
1.8 – 3.5 cfm
Operation Temperature Range
0 ~ +100°C
 0 ~ +100°C
Effective diffusion area
66 in²i( 0.043)
106 in²(0.068)

Diffuser Oxygen Transfer Efficiency And Pressure Drop                          
Application:
1. Municipal wastewater treatment
2. Intermittent operation capability
3. Clean water treatment
4. Sludge stabilization
5. Aeration of fish pond
6. Aeration of streams and lakes

HEAD OFFICE:                                                                                
Ground Floor, House No 137, Eastern Road,                                                        
Lane No 4, New DOHS, Mohakhali,                                                                       
Dhaka-1206, Bangladesh                                                        
Tel: 8802-9898587, 9880152                                                           
Fax: 8802-9898556,
Cell: 88 01678620101


Email Address:

 General Information    :  info@greendotbd.com  
Quotation                    :  marketing@greendotbd.com

Basic RO Purifier

Under Sink RO Water Purifier
Model No: GRO-060

Origin: Taiwan
Capacity: 50/100 Gallon Per Day

Marketed By: Green Dot Limited.
Five stage Reverse Osmosis  Water Purification System designed for where feed water has very low water pressure or where the source water contains higher than normal amounts of dissolved solids.
RO Offers safe, good-tasting water at your fingertips
It meets all your water quality needs. with 50/100 gallons of clear, refreshing water that is not only healthy to drink, but good for cooking. RO system provides safe, pure water using Reverse Osmosis Technology. It is one of the finest units in its class. It's capable of removing over 95% of total dissolved solids, +99% of all organics and +99% of all bacteria.

This system hides away under your sink and puts healthy great-tasting water at your fingertips. It meets all your water quality needs. Our RO comes complete with a  NSF certified 3.2 gallons water storage tank and all the necessary fittings, installation kits, extra color 1/4" tubing, and a long-reach chrome faucet. We don't know of any other system at our price that can approaches its performance.

Features:
o  3.2 Gallons NSF Standards Water Storage Tank.
o  FDA Approved Polypropylene Made Flat Cap Housing.
o  Safety approval: TUV (EN60950) & CE MARK
o  Automatic Shut-off Valve
o  Flow Restrictor, Stainless Steel Check Valve. 
o  Feed water connector & deliver valve 
o  Drain Saddle Valve.
o  Four Color Coded 1/4 inch Tubing for System Connection 
o  Completely Assembled & Water leaking testing
o  100% Factory Tested and Sterilized Ready for Installation.
o  Installation Instruction.

Filtration Process:
First Stage: Sediment Filter
:
The Sediment filter cartridge is manufactured from pure 100% polypropylene fibers. The fibers have been carefully spun together to form a true gradient density from outer to inner surfaces. It is effective in removing dust, mud, rust and sand particles. 
Second Stage: Granular Activated Carbon Filter:
This granular activated carbon filter is composed of high-performance activated carbon that effectively reduces unwanted tastes, odor, organic contaminants, chlorine, pesticides and chemicals that contributed to taste and odor. It is designed to allow maximum contact between the water and carbon, ensuring maximum adsorption

Third Stage: Activated Block Carbon Filter:
This block carbon filter is composed of high-performance Coconut Shell carbon using a patented process and made entirely from FDA-compliant materials that highly effective at reducing 17 hazardous metals: such as lead, radon, mercury, insecticides,  odor and chlorine: taste & odor, from potable drinking water. The unique structure of the carbon block enables it to reduce Giardia, Cryptosporidium, amoeba, and Toxoplasma cysts and fine sediment particles down to 0.5 microns. It is ideal choice for a wide range of residential, food service, commercial and industrial applications.

Fourth Stage: Reverse Osmosis (RO) Filter:
Reverse Osmosis utilizes the unique properties of a semi-permeable membrane to allow fluid to pass while restricting the flow of dissolved ionic material. With pressure applied to impure water on the side of such membrane materials, pure water will pass through, leaving most of the impurities behind. The rejection of the dissolved ionic material is a function of both molecular weight and ionic charge. For example, we can expect a nominal 90% rejection of sodium chloride, which means that the product water passing through the membrane will have a concentration of salt approximately one-tenth that of the feed water. The rejection of calcium carbonate (hardness) will be near 95%, while most metallic salts will be rejected at a rate of approximately 98% to 99%.
The rejection of non-ionic or organic material is primarily by mechanical filtration. Most substances with a molecular weight of over 100 will be completely rejected by an intact reverse osmosis membrane. Low molecular weight organics, such as formaldehyde or phenol, can pass freely through an R.O. membrane, as can most dissolved gasses. Oil, suspended solids and particulate matter are mechanically filtered, as are viruses, bacteria, pyrogen, and larger organic molecules.

To carry the rejected material away from the membrane surface, the feed side of the R.O. membrane is continually flushed with an excess flow, usually two to five times the product flow. This avoids clogging of the membrane surface and reduces the tendency toward scale formation

Fifth Stage: Taste and odor Filter:
This granular activated carbon filter is composed of high-performance activated carbon that effectively reduces unwanted tastes, odor, organic contaminants, chlorine, pesticides and chemicals that contributed to taste and odor. It is designed to allow maximum contact between the water and carbon, ensuring maximum adsorption. We are using NSF approved post carbon to guarantee the taste of water.

HEAD OFFICE:                                                                                
Ground Floor, House No 137, Eastern Road,                                                        
Lane No 4, New DOHS, Mohakhali,                                                                       
Dhaka-1206, Bangladesh                                                        
Tel: 8802-9898587, 9880152                                                           
Fax: 8802-9898556,
Cell: 88 01678620101


Email Address:

 General Information    :  info@greendotbd.com  
Quotation                    :  marketing@greendotbd.com

Roots Blower

Green Dot Limited has introduced modern technologies in Roots Blower in Bangladesh. We are supplying high quality energy efficient three-lobe roots-type blower. Our principles lie well-anchored in innovation and we have thrived in the lead of the Bangladesh and Asian market, placing us on par with Western engineering standards. We remain unstoppable when it comes to super-competitive costs and effectiveness of production, with easy maintenance for enduring quality, for many of your engineering needs.

We are committed to maintaining product quality and innovation, production standardization, and strict inspection system, in order to ensure that Roots Blowers, Pumps and Diffusers can meet customer's requirement. We offer the best quality products and quick after-sale service. We are capable to make products according to customer's special request.  

Products Performance
Bore Size:   25mm - 350mm (1" -14")
Air Flow:     0.1 - 260 m3/min ( 6 - 15600m3/hr)
Pressure:   One Stage Type : 0 - 10000 mmAq
Two Stage Type: 10000 - 20000 mmAq
As Vacuum Pump: up to -5000 mmAq

Advantage of Tri-Lobe Blower:

The Tri-Lobe Blower, because of having rotor tips disposed at 120º on each rotor, causes the rotor set to be much more resistant to angular deflection along it's length, than two lobed rotor sets, which have lobe tips disposed at 180º each - this extra "stiffness" provides less deflection at any load, thus minimizing possible rotor contact with both the cylinder and it's sister rotor during operation.

This same tip orientation provides for more even load distribution between the rotor and gear sets, while under normal load cycling - this feature enhances the life of the bearings and gears - the six smaller volume chambers per revolution of the Tri-Lobe vs. four larger chambers of the two lobe, increases the pulsation frequency, allowing pulsation magnitude to be limited, and reducing characteristic noise levels
 
General Features Description: http://www.rootsblower.com.tw/style/frame/templates2/color_1/spacer.gif
  1. Strict management of quality standards.
  2. Technical customization (size, pressure, design, pump accessories).
  3. Assembled using state-of-the-art CNC machinery enabling precise measurements and 
     grinding needed for more efficient pumping.
  1. Fewer vibrations transmitted through the lobe, for longer-lasting shafts, gears and bearings.
  2. Three-lobe design controls any backflow pressure towards rotor.
  3. Oil and dust-free outlet.
  4. Lubricated with high grade oil, proven to be a much better alternative to grease.
  5. Significant improvement in air performance ratios: wider air, pressure and vacuum range,  
     more stable flow, fewer pressure variations.
  1. Much quieter: our new design can effectively reduce noise by approximately 5 dB.
  2. Lower energy consumption.
  3. All our products can be used for OEM.

All Applications Description: http://www.rootsblower.com.tw/style/frame/templates2/color_1/spacer.gif
  1. Pneumatic conveying
  2. Waste water treatment plants
  3. Electroplating tanks
  4. Printing
  5. Activated sludge systems.
  6. Vacuum handling systems.
  7. Drying systems.
  8. Absorption transporter (for high standards of hygiene)
  9. Filters.
  10. Hospitals and dentistry
 
APPLICATIONS

Used to agitate sediment for purification of water treatment plants
Waste Water Aeration

Reprocess goods absorption maintenance
Suction Fixing System


Electro-plate Tank

Used to transport wheat, grain or granule
Particles transport


Drying System


Cleaning System


Furnace


Suction Moving System


Printing press paper feed


Filtering System



 





HEAD OFFICE:                                                                                
Ground Floor, House No 137, Eastern Road,                                                         
Lane No 4, New DOHS, Mohakhali,                                                                        
Dhaka-1206, Bangladesh                                                        
Tel: 8802-9898587, 9880152                                                            
Fax: 8802-9898556,
Cell: 88 01678620101


Email Address:

 General Information    :  info@greendotbd.com  
Quotation                    :  marketing@greendotbd.com

RO WATER PURIFING MACHINE (Hot, Cold & Normal)

Model No: LSRO 171
► Built-In Reverse Osmosis System
► 5 Stage RO system inside with booster pump
► Case adopt SUS 304 stainless steel material
► LED Hot water temperature display
► Cold and Hot water temperature adjustment
► Highly efficient, noiseless and low power consuming compressor
► Re-boiling feature convenient for doing coffee, tea or instant soup
► Hot water capacity: 5L, Cold water 3L and warm water 10L
► Leakage Circuit Breaker
► Re-boil function, hot water reaches 100℃ directly
► Case adopt SUS 304 stainless steel material
► High efficiency heat exchange, avoid drinking raw water
► Safety for water shortage, overheat, leakage, and power shortage
► USA based reverse osmosis membrane
► Dimension: D53 X W43 X H135 cm


 HOT COLD WARM STANDING RO SYSTEM

Feature:
Compact and space-saving design with built-in RO system
Highly efficient, noiseless and low power-consuming compressor
Re-boiling feature convenient for doing coffee, tea or instant soup
Specification:
Function: Cold, room and hot water filtration system
Water dispensing RO
5 Stage RO system inside with booster pump
Dimension: W40 x D33 x H105 cm
Hot water capacity: 2L, Supplying 5L 850C hot water per hour
Cold water capacity: 3L, supplying 5L 100C cold water per hour

Filtration Process:
First Stage: Sediment Filter: The Sediment filter cartridge is manufactured from pure 100% polypropylene fibers. The fibers have been carefully spun together to form a true gradient density from outer to inner surfaces. It is effective in removing dust, mud, rust and sand particles.

Second Stage: Granular Activated Carbon Filter: This granular activated carbon filter is composed of high-performance activated carbon that effectively reduces unwanted tastes, odor, organic contaminants, chlorine, pesticides and chemicals that contributed to taste and odor. It is designed to allow maximum contact between the water and carbon, ensuring maximum adsorption

Third Stage: Activated Block Carbon Filter:  This block carbon filter is composed of high-performance Coconut Shell carbon using a patented process and made entirely from FDA-compliant materials that highly effective at reducing 17 hazardous metals: such as lead, radon, mercury, insecticides,  odor and chlorine: taste & odor, from potable drinking water. The unique structure of the carbon block enables it to reduce Giardia, Cryptosporidium, amoeba, and Toxoplasma cysts and fine sediment particles down to 0.5 microns. It is ideal choice for a wide range of residential, food service, commercial and industrial applications.

Fourth Stage: Reverse Osmosis (RO) Filter: Reverse Osmosis utilizes the unique properties of a semi-permeable membrane to allow fluid to pass while restricting the flow of dissolved ionic material. With pressure applied to impure water on the side of such membrane materials, pure water will pass through, leaving most of the impurities behind. The rejection of the dissolved ionic material is a function of both molecular weight and ionic charge. For example, we can expect a nominal 90% rejection of sodium chloride, which means that the product water passing through the membrane will have a concentration of salt approximately one-tenth that of the feed water. The rejection of calcium carbonate (hardness) will be near 95%, while most metallic salts will be rejected at a rate of approximately 98% to 99%.

The rejection of non-ionic or organic material is primarily by mechanical filtration. Most substances with a molecular weight of over 100 will be completely rejected by an intact reverse osmosis membrane. Low molecular weight organics, such as formaldehyde or phenol, can pass freely through an R.O. membrane, as can most dissolved gasses. Oil, suspended solids and particulate matter are mechanically filtered, as are viruses, bacteria, pyrogen, and larger organic molecules.

To carry the rejected material away from the membrane surface, the feed side of the R.O. membrane is continually flushed with an excess flow, usually two to five times the product flow. This avoids clogging of the membrane surface and reduces the tendency toward scale formation

Fifth Stage: Taste and odor Filter: This granular activated carbon filter is composed of high-performance activated carbon that effectively reduces unwanted tastes, odor, organic contaminants, chlorine, pesticides and chemicals that contributed to taste and odor. It is designed to allow maximum contact between the water and carbon, ensuring maximum adsorption. We are using NSF approved post carbon to guarantee the taste of water.

HEAD OFFICE:                                                                                
Ground Floor, House No 137, Eastern Road,                                                          
Lane No 4, New DOHS, Mohakhali,                                                                         
Dhaka-1206, Bangladesh                                                        
Tel: 8802-9898587, 9880152                                                             
Fax: 8802-9898556,
Cell: 88 01678620101


Email Address:
General Information    :  info@greendotbd.com Quotation                    :  marketing@greendotbd.com

Water Purifier in Dhaka: Green Dot Limited

We are committed to providing a first class water purifier / filter products service to complement our quality products and to offering clients a strong local support along with the latest technologies in the field of water purifier / treatment. Green Dot Limited expertise in this field spreads over our country, where daily million of peoples are benefited from the service that our company provides. Our manufacturing personnel understand modern water purifier / treatment plants have to be able perform twenty four hours per day, seven days a week, fifty two weeks per year. Water purifier systems and components undergo the strictest scrutiny to ensure they are in line with quality assurance standards adopted through the company (Green Dot Limited).

In the past, the Green Dot Limited has gained at base of water purifier, great trust for its practical spirit and fine credit, and has established good relationship with social financial departments. It has been awarded the honor of “High Credit-Standing” by the bank association and VIP of many banks.

Our water purifier prices are much more competitive than if you want to import the same equipment yourself because of we are importing large volume from manufacturer directly. This competitive edge allows us to accept any size order with no minimums and quote a fixed price when you place your order. It also means you get long-term consistency of product quality and availability.

A phone call or email to our sales offices will be instantly provided prices and other supports that you require. We offer a fast, personal response because we understand the pressures of owning your own business and appreciate that solutions need to be found quickly. If you have any query please email us  info@greendotbd.com we must reply you within 24 hours.