They are high efficiency filters composed of a series of pockets through which the air to be treated passes. These pockets are made in synthetic media and are properly clamped to a support frame, available also in plastic material. Strong seams or edge weldings ensure the good seal of pockets. The property of these filters is the high filtering surface (proportional to the depth of the bags and their number).
The version with the support frame made of plastic, besides ensuring a perfect seal between the filter media and frame, facilitates the disposal of filters after their use (incinerable).
Applications
They are used either as final filters or as pre-filters for absolute filters in air treatment units and ventilation plants. These filters are particularly well suited for application (like food processing and pharmaceutical production) where use of fiberglass media may be restricted.
Features
They are available in 4 models: SH 65, SH 85, SH 95 and SH 99.
The efficiencies and filtration classes in accordance with EN ISO 16890 and EN 779 and the initial pressure drops at the rated flow rate for some standard formats available are:
|
Front dimensions and depth |
Number of pockets | Capacity [m3/h] | Initial pressure drop [Pa] | |||
| SH 65 | SH 85 | SH 95 | SH 99 | |||
| 592 x 592 x 535 | 8 | 3000 | 90 | 110 | 150 | 195 |
| 592 x 592 x 635 | 3400 | |||||
| 592 x 592 x 735 | 3700 | |||||
| 592 x 592 x 915 | 4000 | |||||
| Filtration class according to EN ISO 16890 | ISO ePM10 85% | ISO ePM2,5 65% | ISO ePM1 70% | ISO ePM1 80% | ||
| Filtration class according to EN 779:2012 | M6 | F7 | F8 | F9 | ||
The limit working temperature is of 80°C approx.
Capacities comprised between the 75% and the 125% of the mentioned ones are allowed for a good working of filters. Approximately it is possible to consider, inside this range, a linear correspondence between resistance and capacity.
Filters with different number of pockets, different frontal and/or depth dimensions are available.
Installation & service
It is advisable to foresee a pre-filtration stage before these filters. The LOM-BAG filters can be installed into proper holding frames having frontal access and usually designed to fit any possible pre-filters. It is advisable to replace these filters once having reached a resistance of 300÷350 Pa.