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Ion exchange pocket filters type IFK

IFK type filters are designed for air purification in supply and exhaust ventilation systems, as well as air conditioning systems, from gaseous and vapor contaminants of an acidic and basic nature. Filters with anion exchange material MION AK-22 are designed to purify air from acidic gases and vapors: sulfur dioxide, hydrogen fluoride, hydrogen chloride, hydrogen bromide, nitrogen dioxide, molecular chlorine, bromine, iodine, chrome anhydride, acid vapors: acetic and formic, aerosols of acids: sulfuric, phosphoric, nitric.

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Filters with cation exchange material MION K-5 are designed to purify air from the main gases and vapors: ammonia, hydrazine, hydroxylamine, organic amines: trimethylamine, dimethylamine, methylamine, polyamines (diethylenetriamine, ethylene diamine, triethylene tetramine), aerosols of alkalis and toxic salts: sodium hydroxide , lithium hydroxide, nickel chloride, nickel sulfate, cadmium chloride, cadmium sulfate. Filters are recommended to be used when initial concentrations of gaseous pollutants do not exceed 10 mg/m3. IFK filters also provide air purification from dust and fine aerosols with an efficiency corresponding to class F5 and are recommended for use with initial concentrations of solid aerosols of no more than 5 mg/m3.

General device

The filters consist of a metal frame and ion-exchange filter material sewn into pockets.
The opposite surfaces of the pockets are tightened with limiters, which prevents strong swelling and sticking together of adjacent pockets.
To fix the location of the pockets under the pressure of the air flow, they are connected to each other using tape.
The metal frame of the filter can be made of galvanized steel, and in conditions of increased aggressiveness of the captured
contaminants, it can be made of stainless steel.

Technical requirements and characteristics of ion exchange pocket filters (IFC)

Table 1

Filter type Nominal specific air load m3/h.m2 Dust filter class according to GOST R 51251-99, EN 779 (Evrovent 4/9) Aerodynamic resistance, Pa
Initial Recommended final
IFC 10000 F 5 115 450

The filters remain operational at temperatures of the air being purified from -400C to +400C.

IFC filter parameters

table 2

Overall size at the inlet section, mm Nominal capacity, m3/h Pocket length L, mm
Width, V Height, A Digit(s) in the IFC filter index
500
287
592
490
490
305
610
592
287
490
287
305		 500
592
592
287
592
610
610
892
892
892
287
305		 0
1
2
3
4
5
6
7
8
9
01
05		 2500
1700
3500
1400
2900 1860
3700
5300 1700 4400 800
900		 600

Maintenance of ion exchange pocket filters (IEP)

During operation, chemisorption fibers become saturated with captured gaseous contaminants, after which it is necessary to replace the filters. The service life of the filter depends on operating conditions and can be three months or more. In the case of air purification that contains, in addition to gaseous pollutants, also solid aerosols during operation, it is advisable to monitor changes in aerodynamic resistance. If this resistance reaches the final value indicated in Table 1, it is necessary to replace the filter, even if the filter’s sorption capacity has not been exhausted.

Marking of ion exchange pocket filters (IFC)

Example of marking IFK 2k(sch)
I – ion exchange
F – filter
K – pocket
2 – standard filter size according to the dimensions of the inlet section 592x592mm
k – for purification from acid gases and vapors
sch – for purification from alkaline gases and vapors.

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