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Envelope filters

Envelope Filters: Solid Separation from a Fluid Medium

The separation of dust particles or other solid elements from an air stream is essential in many industries. At Foeth, we have a wide selection of used envelope filters available, ideal for these operations. All machines are tested by our technical team, and their functionality and mechanical integrity are validated before sale and delivery. We update our catalogs frequently to keep you informed of the latest acquisitions.

Choose the best envelope filters at Foeth!

Show Filters
Aerob AAS 2.7, Gr. 3 - Envelope filter

Aerob AAS 2.7, Gr. 3

Envelope filter

In stock NL

305U635

Seko Staubtechnik - Envelope filter

Seko Staubtechnik

Envelope filter

In stock NL

279U570

AVN Apparate- Filter und Anlagenbau - Envelope filter

AVN Apparate- Filter und Anlagenbau

Envelope filter

In stock NL

254S209

AVN Apparate- Filter und Anlagenbau - Envelope filter

AVN Apparate- Filter und Anlagenbau

Envelope filter

In stock NL

254S212

Hosokawa Mikropul 9-4SC-PSR - Envelope filter

Hosokawa Mikropul 9-4SC-PSR

Envelope filter

In stock NL

245P359

Euromilling - Envelope filter

Euromilling

Envelope filter

In stock NL

076H343

Euromilling - Envelope filter

Euromilling

Envelope filter

In stock NL

076H341

Euromilling - Envelope filter

Euromilling

Envelope filter

In stock NL

076H342

DCE - Envelope filter

DCE

Envelope filter

In stock NL

046H171

Waiweldai INDUSTRIEFILTER - Envelope filter

Waiweldai INDUSTRIEFILTER

Envelope filter

In stock NL

013Z067

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Premium quality

We only have machines from premium European manufacturers and mechanically test prior to shipment

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2800+ machines

Foeth has the largest stock in Europe and we update our inventory on a weekly base.

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Readily available

All our machines are available on our premises, ready to be tested and shipped to you!

Envelop Filters: Description and Operation

Envelope filters are units designed for the retention of solid particles while allowing the passage of fluid through the filter medium. The process is typically carried out intermittently, allowing for cleaning of the filter medium during pauses.

Contaminated air is drawn into the feeding hopper, where heavier particles settle and separate from the air stream, accumulating at the base of the system. Finer particles are carried by the fluid through the filter medium, where they accumulate on its inner surface. The clean air that surpasses the filter medium is drawn by an extractor and discharged into the atmosphere.

A wide variety of fabrics or felts with different permeabilities are used as filter media, which define the quality of the recovered air. The filtering surface is designed in a rectangular shape, as it is the most effective way to dislodge dust and ensure thorough system cleaning and uninterrupted operation. It is precisely this design that gives it the name "envelop filter."

Cleaning Procedure for Envelope Filters

The dust retained on the inner surface of the envelope filters remains in place until the extractor is turned off. At that moment, heavier particles can spontaneously fall due to gravity, while lighter ones remain adhered to the filter medium. To facilitate the separation of these particles, mechanical or manual agitation can be employed to release them into the discharge hopper.

The mechanical cleaning system vibrates the support frame of the filtration units, dislodging the internal dust and allowing it to fall into the collection hopper. Once clean, the system is ready to continue its operation. Depending on the system's capacity and the particle concentration in the fluid, the cleaning cycle can be shortened to a few hours.

Acquire envelope filters for your processes from the Foeth catalog! If you need additional information about our bag filters, please call or contact us directly!

Looking for something special?

If we do not have your desired process equipment in stock, please let us know! Our purchase team will try to find the best matching machine for you via their international purchase network.