Filtration Equipment

Filter holders are filtration devices used to retain gases or particles to prevent them being released into the atmosphere. These compact units are inserted into the extraction equipment and can be installed either indoors or outdoors.

The purpose of these devices is to protect people and the environment, and to comply with emissions directives such as those of the EEC. The filter holders are made of RAL-7032 polypropylene (working temperature up to 80ºC) or other plastic materials for special applications, such as PVC or PE.

All our filter holders are equipped with a pre-filter slot (larger particle filter) to extend the life of the filters.

The filter holders for AP modules are high performance filtration devices used to retain highly concentrated corrosive gases at high concentrations, to prevent these being released into the atmosphere. These compact units are inserted into the extraction equipment and can be installed either indoors or outdoors.

The purpose of these devices is to protect the environment and to comply with emissions directives such as those of the EEC.

The filter holders are made of RAL-7032 polypropylene (working temperature up to 80ºC) or other plastic materials for special applications, such as PVC or PE.

All our filter holders are equipped with a pre-filter slot (larger particle filter) to extend the life of the filters.

Pre-filters are the first stage of gas treatment, because they prevent these early clogging of the main filter. Each filter holder has a special pre-filter.

Particle filters, also known as HEPA (High Efficiency Particulate Air) filters work by capturing solid particles in a mesh of randomly arranged fibres. This mesh is made of glass fibre with a diameter of 0.5 μm. The most important factors to consider in a HEPA filter are the diameter of the fibres, the thickness of the filter and the speed of the particles.

The particles stick to the fibres through one of the following mechanisms:

1. Interception: Where particles in an air stream brush against a fibre and stick to it.
2. Impact: Where large particles are not able to avoid the fibres while in the air stream and are forced to impact directly with one of them. This effect increases with decreased separation between the fibres and increased airflow velocity.
3. Diffusion: Smaller particles, especially those smaller than 0.1 µm, collide with gas molecules. This impedes and slows down their passage through the filter. This behaviour is similar to Brownian motion and increases the probability of a particle being caught by one of the two previous mechanisms. It is the most prevalent when the air flow is slow.

Absolute filters with a polyhedral structure and a polystyrene frame. Continuous elastomer seal.
Classes from E10 to H13.  MPPS efficiency 85% to 99.95%.

Activated carbon has a hexagonal crystalline structure, it is extremely porous and can reach surface areas in the order of 500 to 1500 square metres per gram of carbon. This surface area varies depending on the raw materials and the activation process.

To understand how activated carbon works, we must first analyse the process of adsorption, a phenomenon by which atoms on the surface of a solid attract and retain molecules of other compounds through Van der Waals forces. As this phenomenon occurs on the surface, the more surface area available, the better the adsorbency.

There are two types of adsorption phenomena:

• Physisorption: This is the most typical for activated carbon: this type of adsorption involves no electron exchange between the adsorbent and the adsorbate, making the process reversible.
• Chemisorption: This is less frequent: this type of adsorption is usually irreversible as modifications occur in the chemical structures of the adsorbate and the adsorbent.

With injected polystyrene structure.
Maximum temperature: 55º C
Maximum relative humidity: 60 %
Initial pressure loss at maximum flow rate: 120 Pa
Speed of passage: 0,5 m/s

8 distinct adsorbents are available for retaining different types of compounds.

AP modules are V-shaped plastic cassettes made of granular activated carbon. These filters are reusable thanks to a removable cover on the side, which means that the carbon can be replaced and the cassette can be reused. This type of chemical filter is characterised by a higher absorption capacity than other disposable filters. 76mm carbon bed in the passage section.