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Depth, pleated, mesh filter cartridges

Home - Products - Filter elements - Filter cartridges - Depth (prefilters)

Purpose

Depth filter cartridges (pleated, wound, thermally bonded) are intended for high performance preliminary and clarifying filtration of neutral, aggressive liquid and gaseous media (compatible with cartridge materials), and also they are used as prefilters which ensure reliable protection of membrane filter, elongating its lifetime, also they are used as final filters in the cases when there is no need to clean a medium completely from particles exceeding specified size.

Mechanisms of depth filtration

Technofilter’s depth filter cartridges ensure the retention of particles from 0.5 to 100 μm. They consist of numerous layers of fibrous materials - polypropylene, fiberglass, cellulose. Depending on the thickness and the efficiency of the filter layer, the depth filter cartridges retain 95-99% of all particles larger than the filtration ratio.

The filtration process takes place mainly in the depth of the filter material due to mechanical confinement, as well as adsorption mechanisms.

Depth filters can be compared by composition and structure of the material with a voluminous labyrinth sieve, which consists of extremely small cells with the finest and infinitely branched channels. They form a hollow structure equal to approximately 70-85% of the total volume of the filter, which provides a high ability to trap microparticles.

Various suspensions, microorganisms, colloids, lipids are retained while following the long path of this labyrinth, the mechanical effect being enhanced by the adsorption effect, especially in microglass fiber materials. Unlike membrane filters, depth filters are characterized by increased dirt holding capacity and life-time.

Pleated depth filter cartridges

For high performance preliminary and clarifying filtration we offer the whole range of fiber pleated depth filters on the basis of nonwoven materials made of polypropylene fibers, fiberglass and various filter boards.

Technofilter’s pleated depth filter cartridges are highly effective (they retain 98-99.95 % of overall particles and colloid contaminations with the size exceeding filter separation limits), they provide high flow rate and resource at low differential pressure in long term operation processes. A stable matrix and thermal and chemical resistance of materials make it possible to wash, sterilize and regenerate filters multiple times. 

Materials of construction of depth filter cartridges

Brand

Filter material

Type of filter media packaging, retention mechanism

Material of inner and outer bodies, end parts

Description

EPV.S

Microfiberglass

Pleated, depth

Polypropylene

 

 

 

EPV.Sc

A combination of microfine glass, cellulose and polypropylene fibers

Pleated, depth

Polypropylene

EPVg.P

Increased density polypropylene microfiber fabric

Pleated, depth

Polypropylene

EPV.P

Wound polypropylene fibers

Wound, depth

Polypropylene

EPV.P

Thermally bonded polypropylene fibers

Thermo-bonded, depth

Polypropylene

EPNS

Stainless steel mesh

Pleated

Polypropylene

EPNS.P-PWM

Stainless steel mesh

Pleated

Full metal

EPNS.P-PSF Sintered metalic fibers as the filter screen
Pleated Full metal

Geometric characteristics of depth filter cartridge elements

Height, mm

250

500

750

1000

Height, inch

10

20

30

40

Inside diameter, mm

26 or 36

Outside diameter, mm

70

Types of adapters

А, А1, А4, D, D1, В, В(Sl)

All depth filter cartridges can be also produced in the form of capsules.


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