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Shanghai Sffiltech Co.,Ltd., based on the German technology, is the professional manufacturer and supplier of liquid filtration and separation products. Efiltech products include bag filter system, cartridge filter systems, pipe filters, self cleaning filters, auto back-flush self cleaning filter and other industrial filtration systems. They are widely used in electronics, semiconductor, chemical, pharmaceutical, food, beverages, paints, paper industry, automobile manufacturing, inks, resins, water treatment and other industrial fields. Sffiltech provide you affordable, reliable and efficient filtration solutions and perfect service. --Efiltech can provide various filters with international standard, such as American standard, Japanese standard, German standard etc. --All filters can be custom made according to customer drawings. --OEM is available Expect long term and good cooperation with all friends from all of the world.
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MF Series Moduline Bag Filter HousingDownload how to choose the right filter housing Download catalogue for doctop filter Bag filter housing system Quick opening multiple bag type filter housing- VM series VM series quick opening multiple bag type filter, to focus on efficiency and safety and d
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Oil Absorbing Filter SockDownload how to choose the right filter housing Download catalogue for doctop filter Filter bags for application demanding efficiency greater than 99% AGF filter bag is designed to meet increasingly stringent requirements to filter, and adopt all welding se
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Contact Us
- Contacter: 翟总
- Tel: 0086-21-54715167
- Fax: 0086-21-33321505
- Email: info@doctopfilter.com
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Company Address:
Room5004, No.1 CangYuan New tech Building, No.951 Lane JianChuan Road, Minhang district Shanghai
Products
Backwashing Automatic Filter Housing System BCM Series
Download
how to choose the right filter housing
Download
catalogue for doctop filter
Full automatic self cleaning filter housing system
Full automatic back washing filter housing BCM series
BCM full automatic back washing filter housing is suitable for filtering high flow, high speed, low viscosity fluid particle impurity.
BCM full automatic back washing filter housing is a mechanical and electrical products, with advantages of reasonable design, high filtration efficiency, low operating costs, continuous filtration in back washing process, etc., which is widely used in metallurgy, chemical, electric power, oilfield injection water, ballast water, environment-friendly water treatment, etc..
Working principle of BCM full automatic back washing filter housing:
The filtered liquid is flowing from the inlet to the filter housing, then going through the fixing plate into the filter housing, the liquid flows from the filter element inside to the outside, and then flows out from the filter vessel outlet; Impurities produced from back washing filter flows out from the sewage outfall.
How it works?
When liquid flows through the filter element, the solid particles will be trapped in the inner side of the filter element. With the increase of pollutants, the differential pressure between the contaminated side and the clean side of the filter is gradually increasing. When the differential pressure reaches the set value, the differential pressure meter sends a message and the filter housing starts automatic back washing process.
back washing process:
1.Gear motor drives washing arm to turn round by the jackshaft, the rotation angle of the washing arm is controlled by a photoelectric positioning switch, which will make it align to the cleaned filter.
2.The drain valve is opened, so that differential pressure will form between the filter element of the outside (clean side) and pollutant drainage.
3.Under the action of pressure difference, liquid flow of the clean side will flows from cleaned filter outside to inside to carry out back washing process, pollutants accumulated in the inner side of the filter screen will be washed away and flow out the filter through the sewage outfall.
4.The back washing time of each filter elment has been set, so when the back washing time is reached, the pollution discharge valve will be close, and this back washing process of filter element is over, then gear motor will drive washing arm to turn again, conducting back washing to the next set of filters, sewage valve will be open again., and so on to conduct back washing process to each mesh.
5.After all filter cleaning is completed, the washing arm returns to the original position under the control of the photoelectric switch, which means a back washing cycle is end.
6.Because the back washing is washing a set of filters in turn, therefore during the process the filter can maintain a continuous fluid filtration state.
Set back washing process:
1.Differential pressure setting: the filter has differential pressure gauge, which is used to set filter differential pressure.
2.Time setting: the control box has time setting device, which can be used to set back washing process cycle according to user requirements. Differential pressure setting and time setting are automatic back washing configuration process, the two settings exist at the same time, while pressure setting is prior.
3.Manual start: In addition to differential pressure setting and time setting automatic back washing process, there is also TEST key to manually start the process, which is used for debugging and maintenance.
Design features of BCM full automatic back washing filter housing:
1.The internal mechanical structure of filtration equipment using patented technology, realizes the back washing function in true sense, which can completely remove the filter impurities, clean every corner without dead angle, flux without attenuation, and guarantee the filtration efficiency and long service life.
2.Filter equipment selects 304, 316L, 2205, MONEL materials wedge filter element, with advantages of large intensity, high precision, corrosion resistance, and the maximum filtering accuracy is up to 25 microns.
3.Through its own retrieval and strain function, filtering equipment could realize automatic back washing, and can deal with unstable water quality fluctuation without manual intervention.
4.Filter equipment control system is sensitive, accurate operation, and can flexibly adjust the differential pressure and time setting value of back washing based on different water and filter accuracy.
5.During the back washing process, each filter vessel is conducted back washing in turn; which ensures the filter screen safety, efficient cleaning, while other filters are not affected and continue to be filtered.
6.Filtering equipment have less vulnerable parts, no consumable material, with low operating and maintenance costs and easy operation and management.
7.The filter equipment is designed compact and reasonable, with a small size, which is flexible and convenient for installation and movement.
8.Filtration equipment uses pneumatic drain valve, with a short time of back washing process, less water consumption, environmental protection and economic.
9.Filtering equipment working state is displayed by the touch screen, and the differential pressure and time setting is convenient for view.
Application area:
Sea water desalination, circulating cooling water and oilfield reinjection water, ballast water for ship, boiler reuse water, Ultrafiltration back osmosis filtration, ion exchange pretreatment, Paper nozzle filter.
Membrane PTFE Filter Cartridges
Download
how to choose the right filter housing
Download
catalogue for doctop filter
LPTA filter cartridges are featured by permanently hydrophobic PTFE membrane, specially designed for sterile venting and gas application in vaccine manufacturing. They are integrity testable, offering the highest process security, high throughputs, extreme humidity and stringent in-line steam sterilizations. These filters can be steam-sterilizable repeatedly for long service life.
Features and Benefits
● High flow rates and low pressure drop
● High strength, long service life and cost-effective
● 100% integrity testable prior to release
Quality
● Cartridges produced in a controlled environment
● Manufactured according to ISO9001 certified Quality Management System
Specification
LPTA Filter Cartridge for Air/Gas in Vaccine Filtration
Materials of Construction
Membrane
Double-layer Polytetrafluoroethylene (PTFE)
Support
PP
Core, Cage and Drainage
PP
End Caps
PP (222/226 with encapsulated stainless steel reinforcing ring)
O-rings/Gasket
Silicone/EPDM/Viton/TEV
Sealing Technology
Thermal Bonding, No Adhesives
Dimensions
Diameter
Φ68
Length
5 inch, 10 inch, 20 inch, 30 inch, 40 inch
Filtration Area, ft2
≥ 5.8 per 10-inch element
Pore Size, μm
0.01 (for gas)
Maximum Differential Pressure
Forward: 4.2 bar @ 23 ℃; 1.5 bar @ 85 ℃
Integrity Test- at 23 ℃
Bubble point
≥ 1100 mbar with 60/40% IPA/water
HydroCorr (water intrusion test)
≤ 0.75mL/min per 10-inch cartridge with water at 2620mbar
Bacterial Retention
Passed the bacterial challenge testing using Brevundimonas diminuta(ATCC19146) at a minimum challenge concentration of 1 x 107 CFU/cm2.
Extractables, per 10-inch cartridge
≤ 10 mg after 24-h soak in water
Non-Fiber Releasing
Meets the criteria for a “non-fiber releasing” filter as defined in 21 CFR 210.3 (b) (6).
Toxicity
Component materials meet GB/T 14233.2of Chinese National Standard for Safety Tests.
TOC
< 500 ppb after a water flush of 60 liters per 10-inch cartridge
Multiple Sterilization Cycles
200 steam-in-place sterilization or autoclave cycles of 30 min at 123℃
Bacterial Endotoxins
< 0.25 EU/ml as determined by the LAL test
Membrane Nylon Filter Cartridges
Download
how to choose the right filter housing
Download
catalogue for doctop filter
LPNN filter cartridges are characterized by hydrophilic Nylon membrane, providing high throughputs, low extractables and good mechanical strength. These filters are widely used for sterile filtration of facilities water, removing particles, microorganisms and endotoxins to meet the requirements of FDA and other international standards.
Features and Benefits
● Low extractables and high absorption
● High throughputs and cost-effective
● 100% integrity testable prior to release
Quality
● Cartridges produced in a controlled environment
● Manufactured according to ISO9001 certified Quality Management System
Ordering Information
LPSL Low Extractable and Longer Service Life Filter Cartridge for Plasma Fractionation
Application:
• Plasma Fractionation
• Sterile Injection Powder
• Vaccines
• Sterile Injection Powder
• Small & Large Volume Parenterals
• Plasma Fractionation
• Ophthalmic Solutions
• Facilities Water
• Cell Culture Media Preparation
• Active Pharmaceutical Ingredients
• Beer Filtration
• Wine Filtration
• Bottled Water Filtration
• Soft Drink Filtration
• Dairy Filtration
• High Fructose Syrup Filtration
• Semicon Filtration
• Ultrapure/DI Water Filtration
• Photoresist Filtration
• Display Filtration
• CMP Slurry Filtration
• Inkjet Inks Filtration
• Water Filtration
• Chemicals Filtration
Multifilament Filter Sock
Download
how to choose the right filter housing
Download
catalogue for doctop filter
monofilament filter bags feature a wide range of retention ratings. The different materials cover many applications with demanding chemical and thermal properties. These filter bags are designed for surface filtration to retain particles that are larger than the respective pore size.
SENTINEL and SNAP-RING mono-filament filter bags for surface filtration
• Non-deformable mono-filament material is woven into a specific pattern with fusion-welded intersections for extra strength and a retention rating
• All nylon mono-filament filter bags with the FDA seal ring have an inseam for safe filtration
• All nylon mono-filament grades <125 micro are manufactured with a twill-tape envelope on the side seam and bottom seam to prevent liquid bypass through the needle holes
• The pressure-activated FDA seal ring provides a flexible, chemically resistant seal which adapts to any bag filter housing
• Doctopfilter strongly recommends the use of an insertion tool that facilitates the insertion of the filter bag into the bag filter housing and ensures the correct alignment of the filter bag inside the restrainer basket
Application:
• Paints and varnishes
• Inks
• Resins
• Chemicals
• Aggressive solvents
FDA Certificated PP Filter Sock
Download
how to choose the right filter housing
Download
catalogue for doctop filter
Fully compliant and approved for pharmaceuticals, food and beverages
Features
• Selected materials ensure compliance with all food applications. In the case of sewn bags, a special lubricant-free thread material is used
• An independent lab analysis ensures that FDA requirements are met
• Migration is strongly reduced through the careful selection of polymers that are considered to be safe under food law
• FDA seal ring prevents liquid bypass for safe filtration
• Special Single packaging keeps filter bags free from contamination during shipping and storage prior to use
• doctopfilter strongly recommends the use of an insertion tool that facilitates the insertion of the filter bag into the bag filter housing and ensures the correct alignment of the filter bag inside the restrainer basket
• It is made in very clean workshop
• Special for certain FDA requirement environment
Application
• Edible oil
• Gelatine
• Mineral water
• Juices
• Sugar
•Dairy
Double Layer PP Filter Sock
Download
how to choose the right filter housing
Download
catalogue for doctop filter
Double layer pp filter sock are made by two pp filter felt to get more higher efficiency and longer time life.
Contructure way: Fully welded liquid filter bags or sewing thread way
There are items as following:
POXLfilter bag pp long life filer bag with double layer felt
PEXL filter bag Polyester long life filter bag with double layer felt
Feature:
Fully-welded construction for high efficiency and bypass-free filtration
• Fully-welded construction with Doctop filter bag seal ring provides 100% bypass-free filtration
• The pressure-activated Doctop filter seal ring provides a flexible, chemically resistant seal which adapts to any bag filter housing
• Material is free from silicone and crater-forming substances and FDA certification
• Special heat set and polish surface treatment significantly reduces fiber release and keep certain micro rate
• Stable and flexible welded seams that adapt to the restrainer basket
• The handles in the ring make replacing the filter bag quickly and easily
• Save labor cost for changing the single filter bag so shortly.
• doctop strongly recommends the use of an insertion tool that facilitates the insertion of the filter bag into the bag filter housing and ensures the correct alignment of the filter bag inside the restrainer basket
How filter bag works in the bag filter housing
Inside the bag filtration system,the filter bag is supported by an inside filter basket.The incoming fluid is to flow out after filtered by the bag filters ,thus the impurity is intercepted in the filter bag.You can continue to use the filter system after changing the filter bag.It is a trend for the bag filter to replace partly the cartridge filter.The small filter bag can filter large amount of liquid.
Key doctopfilter Applications
• Paints and varnishes
• Inks
• Chemicals
• Process water
VM Fast Open Multi-bag Filter Housing
Download
how to choose the right filter housing
Download
catalogue for doctop filter
Quick opening multiple bag type filter housing - VM series
VM series quick opening multiple bag type filter housing, to focus on efficiency and safety and durability of users design, mainly used in more impurities, filter elements need to be replaced frequently and continuous production and fast switching filter, VM filter housing is a sharp tool to improve production efficiency. Filter element replacement is fast and reliable, effectively reducing the impact of the production disruption caused by the replacement components, significantly improve the production efficiency, at the same time, greatly reduce the labor intensity of workers.
VM opening cover diagram
Filter characteristics:
• The fastest 15 seconds to ON/OFF the filter housing, quickly replace the filter element;
• ON/OFF in a fixed position, no need to round the filter housing to tight nut;
• With safety chain design, exhaust pressure to open the filter housing;
• Gravity balance auxiliary opening mechanism, the single finger can push up to any open angle can be opened;
• Vertical open cover, a plurality of compact can be parallel, saving installation space and cost of piping;
• With a special bag pressing ring fastening tools, simple operation and labor;
• Reduce the downtime to the shortest, promote productivity and reduce operating costs;
• Selection of high quality O type elastomer sealing ring, excellent sealing performance and sealing life time;
• The copper nut is designed, the thread is no longer with the thread, and the rotation is more time saving and labor saving;
• The liquid part is made of pure stainless steel, excellent corrosion resistance and durability;
• 8 models, respectively, three bags, four bags, five bags, six bags, eight bags, twelve bags, seventeen bags, twenty-three bags;
• three kinds of import and export orientation layout, convenient design and installation.
After a period of time, the replacement steps are as follows:
Step 1: open the safety interlock device to ensure the synchronous pressure relief.
Step two: rotate the shaft by hand, open the hoop safely
Step three: use a spring assisted balance mechanism to open the upper cover.
Step four: the use of pressure ring fastening tools, rotary open pressure ring
Step five: remove the bag, change into the new bag
Step six: close the top cover
Step seven: rotate the shaft by hand.
Step eight: close the safety interlock device, enter the status of continuing work
Topline Bag Filter Housing
Download
how to choose the right filter housing
Download
catalogue for doctop filter
Top in single bag filter housing TS series
Standard single bag filter housing1S, 2S, 3S, 4S
DKD standard top in single bag filter housing TS series, "precise quality, simple surface", uses the most advanced precision casting top type filter structure, to optimize the best performance, meeting a variety of harsh working conditions, it is currently the most popular and acclaimed single bag filter housing models.
TS2# Stainless steel, TS2# carbon steel, TS2# PP/PVDF, TS1# Stainless steel, TS1# PP/PVDF, TS4# Stainless steel, TS4# PP/PVDF
• Sealing effect is better, to prevent from leakage;
• Big effective filtration area, and higher filtration efficiency;
• More convenient to replace the filter bag with lower operation cost;
• Reasonable structure, more stable and reliable filtration;
• The installation height can be adjusted to meet the requirements of specific occasion;
• Personalized design, all for your sake.
• TS series opening cover (internal polishing)
Features of DKD top in single bag filter:
The inner space of the filter is used more fully, and completely eradicates space waste in the traditional side entry type.
Open the cover it can quickly replace the filter bag, reducing the second pollution, not like the traditional side entry type needs to remove the filter press ring before replacement.
Fluid inlet pipe is wide, the inside top cover is in trumpet shape, after entering the liquid can automatically part pressure; small impact to filter-bag, effectively protecting the filter-bag, preventing from accidents, small pressure loss, and the filtering is more faster and more stable.
The filter-bag uses patent ring, which is close to the filter and can not be loosened; multiple sealing, so the sealing effect is better.
Backwashing Automatic Filter Housing System BCM Series
Download
how to choose the right filter housing
Download
catalogue for doctop filter
Full automatic self cleaning filter housing system
Full automatic back washing filter housing BCM series
BCM full automatic back washing filter housing is suitable for filtering high flow, high speed, low viscosity fluid particle impurity.
BCM full automatic back washing filter housing is a mechanical and electrical products, with advantages of reasonable design, high filtration efficiency, low operating costs, continuous filtration in back washing process, etc., which is widely used in metallurgy, chemical, electric power, oilfield injection water, ballast water, environment-friendly water treatment, etc..
Working principle of BCM full automatic back washing filter housing:
The filtered liquid is flowing from the inlet to the filter housing, then going through the fixing plate into the filter housing, the liquid flows from the filter element inside to the outside, and then flows out from the filter vessel outlet; Impurities produced from back washing filter flows out from the sewage outfall.
How it works?
When liquid flows through the filter element, the solid particles will be trapped in the inner side of the filter element. With the increase of pollutants, the differential pressure between the contaminated side and the clean side of the filter is gradually increasing. When the differential pressure reaches the set value, the differential pressure meter sends a message and the filter housing starts automatic back washing process.
back washing process:
1.Gear motor drives washing arm to turn round by the jackshaft, the rotation angle of the washing arm is controlled by a photoelectric positioning switch, which will make it align to the cleaned filter.
2.The drain valve is opened, so that differential pressure will form between the filter element of the outside (clean side) and pollutant drainage.
3.Under the action of pressure difference, liquid flow of the clean side will flows from cleaned filter outside to inside to carry out back washing process, pollutants accumulated in the inner side of the filter screen will be washed away and flow out the filter through the sewage outfall.
4.The back washing time of each filter elment has been set, so when the back washing time is reached, the pollution discharge valve will be close, and this back washing process of filter element is over, then gear motor will drive washing arm to turn again, conducting back washing to the next set of filters, sewage valve will be open again., and so on to conduct back washing process to each mesh.
5.After all filter cleaning is completed, the washing arm returns to the original position under the control of the photoelectric switch, which means a back washing cycle is end.
6.Because the back washing is washing a set of filters in turn, therefore during the process the filter can maintain a continuous fluid filtration state.
Set back washing process:
1.Differential pressure setting: the filter has differential pressure gauge, which is used to set filter differential pressure.
2.Time setting: the control box has time setting device, which can be used to set back washing process cycle according to user requirements. Differential pressure setting and time setting are automatic back washing configuration process, the two settings exist at the same time, while pressure setting is prior.
3.Manual start: In addition to differential pressure setting and time setting automatic back washing process, there is also TEST key to manually start the process, which is used for debugging and maintenance.
Design features of BCM full automatic back washing filter housing:
1.The internal mechanical structure of filtration equipment using patented technology, realizes the back washing function in true sense, which can completely remove the filter impurities, clean every corner without dead angle, flux without attenuation, and guarantee the filtration efficiency and long service life.
2.Filter equipment selects 304, 316L, 2205, MONEL materials wedge filter element, with advantages of large intensity, high precision, corrosion resistance, and the maximum filtering accuracy is up to 25 microns.
3.Through its own retrieval and strain function, filtering equipment could realize automatic back washing, and can deal with unstable water quality fluctuation without manual intervention.
4.Filter equipment control system is sensitive, accurate operation, and can flexibly adjust the differential pressure and time setting value of back washing based on different water and filter accuracy.
5.During the back washing process, each filter vessel is conducted back washing in turn; which ensures the filter screen safety, efficient cleaning, while other filters are not affected and continue to be filtered.
6.Filtering equipment have less vulnerable parts, no consumable material, with low operating and maintenance costs and easy operation and management.
7.The filter equipment is designed compact and reasonable, with a small size, which is flexible and convenient for installation and movement.
8.Filtration equipment uses pneumatic drain valve, with a short time of back washing process, less water consumption, environmental protection and economic.
9.Filtering equipment working state is displayed by the touch screen, and the differential pressure and time setting is convenient for view.
Application area:
Sea water desalination, circulating cooling water and oilfield reinjection water, ballast water for ship, boiler reuse water, Ultrafiltration back osmosis filtration, ion exchange pretreatment, Paper nozzle filter.
Membrane PTFE Filter Cartridges
Download
how to choose the right filter housing
Download
catalogue for doctop filter
LPTA filter cartridges are featured by permanently hydrophobic PTFE membrane, specially designed for sterile venting and gas application in vaccine manufacturing. They are integrity testable, offering the highest process security, high throughputs, extreme humidity and stringent in-line steam sterilizations. These filters can be steam-sterilizable repeatedly for long service life.
Features and Benefits
● High flow rates and low pressure drop
● High strength, long service life and cost-effective
● 100% integrity testable prior to release
Quality
● Cartridges produced in a controlled environment
● Manufactured according to ISO9001 certified Quality Management System
Specification
LPTA Filter Cartridge for Air/Gas in Vaccine Filtration
Materials of Construction
Membrane
Double-layer Polytetrafluoroethylene (PTFE)
Support
PP
Core, Cage and Drainage
PP
End Caps
PP (222/226 with encapsulated stainless steel reinforcing ring)
O-rings/Gasket
Silicone/EPDM/Viton/TEV
Sealing Technology
Thermal Bonding, No Adhesives
Dimensions
Diameter
Φ68
Length
5 inch, 10 inch, 20 inch, 30 inch, 40 inch
Filtration Area, ft2
≥ 5.8 per 10-inch element
Pore Size, μm
0.01 (for gas)
Maximum Differential Pressure
Forward: 4.2 bar @ 23 ℃; 1.5 bar @ 85 ℃
Integrity Test- at 23 ℃
Bubble point
≥ 1100 mbar with 60/40% IPA/water
HydroCorr (water intrusion test)
≤ 0.75mL/min per 10-inch cartridge with water at 2620mbar
Bacterial Retention
Passed the bacterial challenge testing using Brevundimonas diminuta(ATCC19146) at a minimum challenge concentration of 1 x 107 CFU/cm2.
Extractables, per 10-inch cartridge
≤ 10 mg after 24-h soak in water
Non-Fiber Releasing
Meets the criteria for a “non-fiber releasing” filter as defined in 21 CFR 210.3 (b) (6).
Toxicity
Component materials meet GB/T 14233.2of Chinese National Standard for Safety Tests.
TOC
< 500 ppb after a water flush of 60 liters per 10-inch cartridge
Multiple Sterilization Cycles
200 steam-in-place sterilization or autoclave cycles of 30 min at 123℃
Bacterial Endotoxins
< 0.25 EU/ml as determined by the LAL test
Membrane Nylon Filter Cartridges
Download
how to choose the right filter housing
Download
catalogue for doctop filter
LPNN filter cartridges are characterized by hydrophilic Nylon membrane, providing high throughputs, low extractables and good mechanical strength. These filters are widely used for sterile filtration of facilities water, removing particles, microorganisms and endotoxins to meet the requirements of FDA and other international standards.
Features and Benefits
● Low extractables and high absorption
● High throughputs and cost-effective
● 100% integrity testable prior to release
Quality
● Cartridges produced in a controlled environment
● Manufactured according to ISO9001 certified Quality Management System
Ordering Information
LPSL Low Extractable and Longer Service Life Filter Cartridge for Plasma Fractionation
Application:
• Plasma Fractionation
• Sterile Injection Powder
• Vaccines
• Sterile Injection Powder
• Small & Large Volume Parenterals
• Plasma Fractionation
• Ophthalmic Solutions
• Facilities Water
• Cell Culture Media Preparation
• Active Pharmaceutical Ingredients
• Beer Filtration
• Wine Filtration
• Bottled Water Filtration
• Soft Drink Filtration
• Dairy Filtration
• High Fructose Syrup Filtration
• Semicon Filtration
• Ultrapure/DI Water Filtration
• Photoresist Filtration
• Display Filtration
• CMP Slurry Filtration
• Inkjet Inks Filtration
• Water Filtration
• Chemicals Filtration
Multifilament Filter Sock
Download
how to choose the right filter housing
Download
catalogue for doctop filter
monofilament filter bags feature a wide range of retention ratings. The different materials cover many applications with demanding chemical and thermal properties. These filter bags are designed for surface filtration to retain particles that are larger than the respective pore size.
SENTINEL and SNAP-RING mono-filament filter bags for surface filtration
• Non-deformable mono-filament material is woven into a specific pattern with fusion-welded intersections for extra strength and a retention rating
• All nylon mono-filament filter bags with the FDA seal ring have an inseam for safe filtration
• All nylon mono-filament grades <125 micro are manufactured with a twill-tape envelope on the side seam and bottom seam to prevent liquid bypass through the needle holes
• The pressure-activated FDA seal ring provides a flexible, chemically resistant seal which adapts to any bag filter housing
• Doctopfilter strongly recommends the use of an insertion tool that facilitates the insertion of the filter bag into the bag filter housing and ensures the correct alignment of the filter bag inside the restrainer basket
Application:
• Paints and varnishes
• Inks
• Resins
• Chemicals
• Aggressive solvents
FDA Certificated PP Filter Sock
Download
how to choose the right filter housing
Download
catalogue for doctop filter
Fully compliant and approved for pharmaceuticals, food and beverages
Features
• Selected materials ensure compliance with all food applications. In the case of sewn bags, a special lubricant-free thread material is used
• An independent lab analysis ensures that FDA requirements are met
• Migration is strongly reduced through the careful selection of polymers that are considered to be safe under food law
• FDA seal ring prevents liquid bypass for safe filtration
• Special Single packaging keeps filter bags free from contamination during shipping and storage prior to use
• doctopfilter strongly recommends the use of an insertion tool that facilitates the insertion of the filter bag into the bag filter housing and ensures the correct alignment of the filter bag inside the restrainer basket
• It is made in very clean workshop
• Special for certain FDA requirement environment
Application
• Edible oil
• Gelatine
• Mineral water
• Juices
• Sugar
•Dairy
Double Layer PP Filter Sock
Download
how to choose the right filter housing
Download
catalogue for doctop filter
Double layer pp filter sock are made by two pp filter felt to get more higher efficiency and longer time life.
Contructure way: Fully welded liquid filter bags or sewing thread way
There are items as following:
POXLfilter bag pp long life filer bag with double layer felt
PEXL filter bag Polyester long life filter bag with double layer felt
Feature:
Fully-welded construction for high efficiency and bypass-free filtration
• Fully-welded construction with Doctop filter bag seal ring provides 100% bypass-free filtration
• The pressure-activated Doctop filter seal ring provides a flexible, chemically resistant seal which adapts to any bag filter housing
• Material is free from silicone and crater-forming substances and FDA certification
• Special heat set and polish surface treatment significantly reduces fiber release and keep certain micro rate
• Stable and flexible welded seams that adapt to the restrainer basket
• The handles in the ring make replacing the filter bag quickly and easily
• Save labor cost for changing the single filter bag so shortly.
• doctop strongly recommends the use of an insertion tool that facilitates the insertion of the filter bag into the bag filter housing and ensures the correct alignment of the filter bag inside the restrainer basket
How filter bag works in the bag filter housing
Inside the bag filtration system,the filter bag is supported by an inside filter basket.The incoming fluid is to flow out after filtered by the bag filters ,thus the impurity is intercepted in the filter bag.You can continue to use the filter system after changing the filter bag.It is a trend for the bag filter to replace partly the cartridge filter.The small filter bag can filter large amount of liquid.
Key doctopfilter Applications
• Paints and varnishes
• Inks
• Chemicals
• Process water
VM Fast Open Multi-bag Filter Housing
Download
how to choose the right filter housing
Download
catalogue for doctop filter
Quick opening multiple bag type filter housing - VM series
VM series quick opening multiple bag type filter housing, to focus on efficiency and safety and durability of users design, mainly used in more impurities, filter elements need to be replaced frequently and continuous production and fast switching filter, VM filter housing is a sharp tool to improve production efficiency. Filter element replacement is fast and reliable, effectively reducing the impact of the production disruption caused by the replacement components, significantly improve the production efficiency, at the same time, greatly reduce the labor intensity of workers.
VM opening cover diagram
Filter characteristics:
• The fastest 15 seconds to ON/OFF the filter housing, quickly replace the filter element;
• ON/OFF in a fixed position, no need to round the filter housing to tight nut;
• With safety chain design, exhaust pressure to open the filter housing;
• Gravity balance auxiliary opening mechanism, the single finger can push up to any open angle can be opened;
• Vertical open cover, a plurality of compact can be parallel, saving installation space and cost of piping;
• With a special bag pressing ring fastening tools, simple operation and labor;
• Reduce the downtime to the shortest, promote productivity and reduce operating costs;
• Selection of high quality O type elastomer sealing ring, excellent sealing performance and sealing life time;
• The copper nut is designed, the thread is no longer with the thread, and the rotation is more time saving and labor saving;
• The liquid part is made of pure stainless steel, excellent corrosion resistance and durability;
• 8 models, respectively, three bags, four bags, five bags, six bags, eight bags, twelve bags, seventeen bags, twenty-three bags;
• three kinds of import and export orientation layout, convenient design and installation.
After a period of time, the replacement steps are as follows:
Step 1: open the safety interlock device to ensure the synchronous pressure relief.
Step two: rotate the shaft by hand, open the hoop safely
Step three: use a spring assisted balance mechanism to open the upper cover.
Step four: the use of pressure ring fastening tools, rotary open pressure ring
Step five: remove the bag, change into the new bag
Step six: close the top cover
Step seven: rotate the shaft by hand.
Step eight: close the safety interlock device, enter the status of continuing work
Topline Bag Filter Housing
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Top in single bag filter housing TS series
Standard single bag filter housing1S, 2S, 3S, 4S
DKD standard top in single bag filter housing TS series, "precise quality, simple surface", uses the most advanced precision casting top type filter structure, to optimize the best performance, meeting a variety of harsh working conditions, it is currently the most popular and acclaimed single bag filter housing models.
TS2# Stainless steel, TS2# carbon steel, TS2# PP/PVDF, TS1# Stainless steel, TS1# PP/PVDF, TS4# Stainless steel, TS4# PP/PVDF
• Sealing effect is better, to prevent from leakage;
• Big effective filtration area, and higher filtration efficiency;
• More convenient to replace the filter bag with lower operation cost;
• Reasonable structure, more stable and reliable filtration;
• The installation height can be adjusted to meet the requirements of specific occasion;
• Personalized design, all for your sake.
• TS series opening cover (internal polishing)
Features of DKD top in single bag filter:
The inner space of the filter is used more fully, and completely eradicates space waste in the traditional side entry type.
Open the cover it can quickly replace the filter bag, reducing the second pollution, not like the traditional side entry type needs to remove the filter press ring before replacement.
Fluid inlet pipe is wide, the inside top cover is in trumpet shape, after entering the liquid can automatically part pressure; small impact to filter-bag, effectively protecting the filter-bag, preventing from accidents, small pressure loss, and the filtering is more faster and more stable.
The filter-bag uses patent ring, which is close to the filter and can not be loosened; multiple sealing, so the sealing effect is better.
