PRODUCTS · PRECOATING DISPENSER
Precoating Dispenser – Protect filter cartridges
Precoating dispensers introduce a controlled layer of mineral powder into the extraction air stream before it reaches the filter. This protective layer helps prevent sticky, oily and difficult contaminants from adhering directly to cartridge media. The result is longer filter life, more stable filtration performance and easier maintenance in demanding industrial applications.
50 L
dispenser volume
45 m³/h
dosing airflow
38 kg
unit weight
ABOUT PRECOATING
What is precoating and when should you use it?
Precoating is a filtration support process where a fine mineral powder is introduced into the extraction air stream before contaminated air reaches the filter cartridges. The powder forms a protective layer on the cartridge surface. Sticky fumes, oily particulate and difficult dust then bind to this layer rather than directly to the filter media. This can reduce rapid clogging, help stabilise filtration performance and extend cartridge service life. Tehno Filter specifically recommends the TFD for dust that is difficult to remove from filter cartridges and for sticky or oil-saturated applications.
Why use a precoating dispenser?
Some contaminants do not behave like ordinary dry dust. Sticky or oily particulate can quickly block cartridge media, increase pressure drop and shorten filter life. By introducing precoat powder into the airflow, these contaminants are neutralised or dried before they accumulate directly on the filter surface.
KEY FEATURES
Function
Filter cartridge protection
Precoat material
Calcite-based powder
Installation
Upstream of the filter
Main benefit
Reduced cartridge clogging
Typical contaminants
Sticky, oily and difficult dust
Operation
Periodic powder injection
PRODUCT
Precoating dispenser in our range
A compact dosing solution designed to protect cartridge filtration systems in difficult process conditions.
CALCITE PRECOATING DISPENSER
TFD Dispenser
TFD is a compact precoating dispenser designed to inject calcite powder into the extraction air stream before it reaches the filtration unit. The dispenser is installed on the duct upstream of the filter. At defined intervals, calcite is introduced into the pipe and carried with the airflow onto the filter cartridges.
50 L · 45 m³/h · cartridge protection
Not sure whether your process needs precoating?
Tell us what type of dust, fumes or oil contamination reaches your filter cartridges and we will help determine whether precoating can improve filter performance and service life.
APPLICATIONS
Where precoating dispensers are used
Precoating is particularly useful in processes where dust is difficult to remove from cartridge media or where sticky and oily contaminants can rapidly foul the filter surface.
WHY TEHNO FILTER PRECOATING
A simple way to protect expensive filter media
NEED TO PROTECT YOUR FILTER CARTRIDGES?
Tell us what contaminant reaches the filter, how quickly the cartridges are loading and what filtration system you currently use. Our team can help determine whether a precoating dispenser is the right solution.