Specialist Filtration
The generic word ‘filtration’ can encompass many applications across a wide range of industries, the majority of which can be served by the commonly available filter media where process temperatures are low and / or the environment inert.
It therefore takes a very special medium to tackle the difficult and unusual conditions found in today's chemical, petrochemical or general process industries.
FFSL solves these difficult problems by supplying porous ceramic media that are chemically inert, stable and available in a variety of controlled and special grades, with temperature capabilities of up to 900ºC.
Gas and Air Filtration
FFSL has many years experience in the manufacture and selection of ceramic filters for gas/air filtration. Our range of Porous Ceramic elements and filter units meet industrial demands for an effective and highly efficient filter to remove solids and traces of free oil and water from compressed air, gas lines and industrial processes. The following table shows the retention capability for specific ceramic grades:
| Ceramic Element Grade | 0 | 9 | 8 | 6 | 5 | 4 | 3 | 2 |
| Nominal Retention (microns) | 0.3 | 1 | 2 | 10 | 20 | 30 | 50 | 100 |
Key Features
Efficiencies: a wide range of efficiencies with pore structures to give filtration from 0.3 to 100 micron.
Sterile Air: with an efficiency of 99.999% at 0.3 micron.
Coalescing: with specially treated ceramic for removal, by impingement, of liquids such as oil and water from air and gas streams.
Hot Gases: materials are available with special properties to resist thermal shock.
Environments: suitable for aggressive and corrosive applications.
Liquid Filtration
Liquid filtration is presented with similar problems to air and gas when faced with high temperatures and aggressive acidic conditions. Ceramic elements prove to be reliable and cost effective solutions to removing solids from water, chemical and petrochemical products, and other processes. The same features that benefit air and gas apply to liquid but with slightly differing filtration characteristics. The following table shows the retention capability for specific ceramic grades:
| Ceramic Element Grade | 0 |
9 |
8 |
6 |
5 |
4 |
3 |
2 |
| Nominal Retention (microns) | 1 |
2 |
6 |
20 |
40 |
60 |
150 |
230 |
Key Features
Support Structure: for either filter bag/sleeves or a precoat filter medium.
Chemical Compatibility: suitable for the filtration of aggressive liquids, including alkaline solutions and many acids.
High Mechanical Strength: to withstand high differential pressures and in-situ back flushing
General Features
Controlled pore size
Controlled porosity and permeability
Coalescing capability
Chemically inert - can handle acidic gases
High Temperature capability to 900ºC
Range of standard element sizes
Low cost of ownership
Typical Applications
Hot Gas Filtration
Precoat Filtration
Coalescing Filtration
Process Filtration
Dust and Fume Filtration
Compressed Air Filtration
Dust and Fume Filtration
Available Ceramic Filter Media
FFSL has a range of standard ceramic materials. Each has its unique characteristics and capabilities. The materials used most commonly are Pyrolith and Coralith.
Pyrolith
Aluminosilicate particles bonded by glass. Pyrolith can withstand hot and cold acids (not hydrofluoric acid or acid fluorides), alkaline solutions up to pH9 and hot gases up to 900°C.
Chemical Composition
Coralith
Aluminosilicate particles bonded by glass. Coralith can withstand hot and cold acids (not hydrofluoric acid or acid fluorides), alkaline solutions up to pH9 and hot gases up to 900°C.
Chemical Composition
Trace Elements
Typical Filtration Tube Sizes
FFSL has a range of standard ceramic elements. These can be fitted into our range of Aerox filter units or custom manufactured for inclusion into existing or purpose built customer housings.
Specific sizes are available on request but vary from 114mm long x 29mm OD x 13mm ID to 1000mm long x 70mm OD x 40mm ID.
Typical Flow versus Pressure Drop Charts
(For Ceramic Element Grade Number)
