Pre filters or coarse filters which are used for filtering larger dust particles 10 micron and above. Trijama Pre filters have high dust holding capacity which contribute in increasing the life of Fine filters. Pre filters are classified as G1 to G4 grade as per Eurovent classification ( MERV-5 to MERV-8 as per ASHRAE Classification). Pre filters are available in air cleanable and water washable type.
Air cleanable pre filters are made from High loft - High Dust holding non woven and gradual fiber mounted synthetic media. These filters reduces frequent cleaning or washing thereby reducing maintenance cost due to its longer service life.
Washable type pre filters are made from High strength synthetic needle felt media supported with HDPE mesh and Aluminium mesh to withstand frequent washing. These filters are manufactured in pleated construction to have comparatively more surface area than Air cleanable filters.
Pre filters are available in flat media construction to handle low volume of Air. Disposable pre filters are also available in Cardboard frame.
Available in Box type and Flange type.
Frame material : GI , M.S. powder coated, Stainless Steel and Aluminium.
General recommended filter selection v/s Micron level | ||||||||||||||||||||||||
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Fine filters or secondary filters which are used for filtering finer dust particles 5 micron to 1 micron. Fine filters have medium dust holding capacity which contribute in increasing the life of super fine absolute filters. Fine filters are classified as F5 to F9 grade as per Eurovent classification (MERV-9 to MERV - 15 as per ASHRAE Classification )
Air cleanable Fine filters are made from High loft - High Dust holding non woven and gradual fiber mounted synthetic media. These filters reduce frequent cleaning or washing thereby reducing maintenance cost due to its longer service life.
Washable type Fine filters are made from High strength synthetic needle felt media supported with HDPE mesh and Aluminium mesh to withstand frequent washing. These filters are manufactured in pleated construction to have comparatively more surface area than Air cleanable filters.
Available in Box type and Flange type.
Frame material : GI , M.S. powder coated, Stainless Steel and Aluminium.
General recommended filter selection v/s Micron level | ||||||||||||||||||||||||
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Pocket filters with High loft synthetic media: Trijama synthetic pocket filters are manufactured from High performance - gradual fiber mounted - thermally bonded -non shredding non woven - silicon free fibers. These pocket filters are designed to handle more volume of air in a constrained small filtering area. Trijama synthetic pocket filters offer comparatively low pressure against turbulent high air velocity. These pocket filters enhances the life of filter with high dust holding capacity.
Available in G2,G3,G4,F5,F6 and F7 Grades.
Pocket filters with Diamond spacers: Trijama also offers synthetic non woven self supported rigid Pocket filters with aerodynamic diamond shaped tubular Spacers, for 100% utilization of filtering area resulting in lower Pressure drop and higher dust holding capacity and extended service life. Lower pressure Drop helps in reducing energy cost.
Available in G2,G3,G4,F5,F6 and F7 Grades.
Pocket filters with synthetic melt blown media: Trijama offers secondary Pocket filters manufactured in synthetic melt blown media which have high efficiency with comparatively lesser dust holding capacity than High loft synthetic media. These pocket filters are widely used in clean room Air Handling Units where the clean air is re-circulated. Individual pocket is thermally or ultrasonically welded at the edges to avoid leakages from the joints.
Available in F5,F6 ,F7 and F9 Grades.
Pocket filters with synthetic melt blown media: Trijama also offers high temperature pocket filters in glass Fiber non woven filter media to withstand temperature u pto 150 Deg C where normal synthetic filters cannot be used.
These glass fiber pocket filters are available in F5, F6, F7 and F9 Grades. General recommended selection of filters against micron size dust particle.
General recommended filter selection v/s Micron level | |||||||||||||||||||||||||||||||||||||||||
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Trijama HEPA filters are manufactured in clean room to ensure consistent and predictable quality of filtration. Filter media is made of high quality imported micro fine borosilicate glass fiber paper which is water repellent and high in strength. Trijama imports the glass fiber media from reputed manufacturers from France and USA. These filters are manufactured in continuous multiple fold media spaced by hemmed edge aluminium corrugated separators. To eliminate damages due to sharp edges of Aluminium seporators and packed in specially designed frames to provide rigidity and uniform air flow.
Each HEPA filter passes through stringent testing and finds reliability in critical applications like nuclear application, semiconductor complexes, Hospitals, Pharmaceuticals, food processing, Bio-technology, Electronic and aerospace. Available in Flange and Box type.
Frames available in: SS, Aluminium Anodized.
The categories specified by IES-RP-CC001.3 are briefly as follows
Type A: Efficiency tested to 99.97% at 0.3 microns and rated flow capacity with thermally generated DOP aerosol challenge.- Type B: Efficiency tested as above , but at rated flow and 20% at rated flow.
- Type C: Efficiency tested as above and additionally face scanned for spot penetration not to exceed 0.01% at any point, using a photometer.
- Type D: Efficiency tested for 99.999% at 0.3 micron, and scan tested for spot penetration using a photometer.
- Type E: Constructed and tested in accordance with MIL-F51477 or MIL-51068.
- Type F: Efficiency tested for 99.999% to 99.9999% at 0.1 to 0.2 microns, and scan.
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Separator less / mini pleat HEPA filter: Trijama - Mini pleat HEPA filters are made from Imported Borosilicate glass fiber paper media, continuously pleated and separated by hot melt adhesive thread separators.- protected both sides with smooth powder coated expanded Flat metal mesh and assembled in rigid frames. Mini pleat HEPA filter are supplied in H10 to H14 grade. They are offered in a complete range of standard sizes to meet the needs of critical applications where high level of filtration is Required. Individual filter testing under rigid quality control and modern assembly methods ensures conformance to specification. Each Mini pleat HEPA filter is scan tested after assembly with Thermally generated aerosol to ensure that it attains required efficiency according to the grade. Tested parameters such as Efficiency , Air flow,Pressure drop across the filter with dimensions are certified on each filter identification label. Trijama can supply Minipleat HEPA filters with Gel Seal also.
Mini pleat filters are light weight and easy to handle. Available in many standard sizes:
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Trijama also supply Extended ‘V’ shaped mini pleat HEPA filters to accommodate more volume of air in a constrained face area. ‘V’ shape mini pleat filters are available in Box type and flange type. These filters are available in Stainless steel, Aluminium and plastic Molded frames.
TFIPL manufactures High temperature HEPA filters in high strength Imported Borosilicate micro fine high temperature glass fiber filter paper continuously deep folded - spaced with both side hemmed corrugated aluminium separators , assembled in metal frame sealed all four sides with high temperature adhesive. High temperature gaskets are used on the flanges. Available upto 250 deg. C.
Fan filters Unit: Trijama’s Clean room Fan Filter Unit is a leading-edge fan filter unit (FFU) designed to provide filtered laminar airflow over a specific area. The unit integrates a high efficiency fan together with a HEPA filter. The FFU draws in contaminated air from the top of the module through Pre filter , and exhausts filtered clean air vertically through HEPA filter in a unidirectional (laminar) air stream at its base. FFU’s are commonly used in the construction of Class 1 to Class 100,000 clean rooms (as per the US Federal Standard 209E). Fan Filter Unit design is optimized for low noise level and energy efficiency. Our FFU frames are fabricated from CNC fabrication machines.
Quality control at factory before shipment:
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Functional tests such as DOP and Air flow capacity.
- visual inspection such as Dimension and Electrical connections etc.
Trijama’s Fan Filter Units general features:
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Lightweight, corrosion-resistant, construction is completely smooth and clean room-compatible. Material used GI, Aluminium , SS.
- Direct-driven centrifugal blowers (230 Volts AC) operates at higher energy efficiency levels with larger airflow volumes.
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Better airflow uniformity across the entire filter face for superior laminar flow and product protection.
- Standard blower speed controller allows for easy adjusting of the FFU speed controller.
- Improved mounting techniques and sound insulation material reduce blower noise about 65 dBA.
| FFU Face Area | Air Flow Capacity | No. of Blowers Used |
| 610 X 610 mm (2' X 2') | 650 Cmh | Single |
| 915 X 610 mm (3' X 2') | 950 Cmh | Single |
| 1220 X 610 mm (4' X 2') | 1250 Cmh | Double |
| Efficiency to 0.3 micron (DOP) |
| H 12 - 99.97% |
| H 13 - 99.99% |
| H 14 - 99.997% |
Trijama Hood type terminal HEPA filters are supplied with Mini pleat HEPA filter with circular connecting duct collar with air diffusion plate at air inlet side. It is light weight compared to normal HEPA filter with plenum box. Supplied in 2 face size : 1) 4' L X 2' W 2) 2' L X 2' W in 2 depths 110 mm and 135 mm.
Collars are supplied in two sizes - ∅250 and ∅305
Carbon filters: Activated carbon powder impregnated in non woven synthetic fabric is able to filter and absorb the common contaminants in the air, like ozone, SO2 and ammonia gas, Methyl mark alcohol,H2,methyl pyruvate sulfide, Methylthio , and some other harmful gas like NO2,SO2. It is the best choice to purify the air for the air-conditioning and air ventilation spaces. It is applied to some chemical , pharmaceutical , food, entertainment place where the clean air is needed . It also used for removing odor.
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Adopting activated carbon felt.
- Great absorption capacity.
- Getting rid of a variety of noxious gases.
- Available in roll form or assembled in GI , AL, and SS Frames as per required size and capacity.
Standard Sizes:
610 X 610 X 50 mm - 1000 cmh
610 X 610 X 150 mm - 1700 cmh
610 X 610 X 300 mm - 3400 cmh
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