Innovative Industrial Filtration
Individual solutions for all areas of application
Hengst – A Reliable Partner
Development, production and marketing –
all from a single source
Founded in Münster in 1958, the HENGST company is
today one of the leading manufacturers of filters and
filter systems worldwide.
The company offers the classic advantages of a familyowned
business: short decision routes, continuity of
company policies, and the ability to respond quickly and
flexibly to market conditions.
We attach particular importance to long-term customer
relations based on mutual trust.
State-of-the-art production technology and
excellent quality standards ensure consistently
high-quality, high-performance products.
HENGST is certified in accordance with the quality
and environmental standards TS 16949, ISO 9001
and ISO 14001.
Filter Cartridges for De-dusting Units
Individual filter concepts
for every application
• Powder coating systems
• Sandblasting equipment
• Gas turbines (inlet air filtration)
• Welding smoke exhaust systems
• Pneumatic conveyor systems
• Crushing and mixing plants
• Filling and draining plants
We provide custom-designed filter concepts and a
comprehensive assortment of standard sizes in accordance
with DIN 71459. Select the filter suited to your requirements
from a wide range of dimensions and materials.
You can rely on our years of experience
in selecting filter surfaces, filter media,
mounting designs and stabilization methods.
The Cartridge Module
De-dusting cartridges made to measure
HENGST is the sole supplier worldwide
of embossed filter cartridges with lengths
of up to 1200 mm.
For cellulose and synthetic fiber media, we provide
system manufacturers and operators with decisive
advantages in terms of service life and operating costs.
HENGST cartridge modules with filter cartridges for
de-dusting units optimally combine the cost-effective
production of standard filters with maximum flexibility
and a wide range of choice to meet your requirements.
The selection of a filter medium suitable for a particular
application is followed by the manufacture of the medium.
Selection procedure for
Hengst cartridge module
1. Selection of the appropriate dimensions
2. Selection of the mounting design
3. Selection of the external stabilizer
4. Selection of the filter medium
As shown below, the symbols resulting from
these four steps combine to form the order number.
Mounting/Design External stabilizer Filter medium
Dirty gas side
Dirty gas side
Clean gas side
mm mm m 2
327 1200 2 – 36
302 985 G O R B LB SM SB NS OS Designation
12 m 2
327 606 120 G OS Polyester
Filter Elements for
Cleaning Appliances and Power Tools
Filter elements for
• Vacuum sweepers
• Wet/dry vacuum cleaners
• Domestic vacuum cleaners
Our cellulose and polyester filters with round and flat
construction have ideal cleaning properties due to the
widely spaced pleats (System ProClean).
Wet/dry vacuum cleaners
From Hengst you can obtain flat pleat filters and filter
cartridges in various filter classes (e.g. BGIA: L, M, H),
with media made of natural and synthetic fibers.
These filter media can be further optimized depending
upon the type of application (e.g. oleophobic, hydrophobic,
nanofiber, meltblown or PTFE membrane media).
Domestic vacuum cleaners
We supply high-efficiency particulate air (HEPA) filters
and high-performance ultra-low penetration air (ULPA)
filters in accordance with EN 1822, made with glass fiber
media and washable media with a PTFE membrane.
To meet customer requirements, the materials used provide
continuous heat resistance for temperatures up to 100 °C.
Filter elements for
• Grinding machines
• Rotary hammers
• Wall chasers
We supply filter elements as well as complete filter modules.
The wide spacing between the pleats (System ProClean)
ensures a high dust-holding capacity and optimal cleaning
HENGST guarantees intensive support during the entire power tool development phase,
and also designs testing equipment in accordance with customer specifications.
System ProClean Flat Pleat Filters
the system with flexible pleats
Conventionally designed flat pleat filters have closely
spaced pleats, which are often rigidly held in a stabilizing
frame or cast component. The resulting small spaces
between the pleats rapidly fill with dust, which at best
can be only partially removed due to the rigid, closely
spaced arrangement of the pleats.
In order to solve this problem, we have developed
production processes that permit the manufacture of
flat pleat filter systems with freely movable pleats
spaced more than 5 mm apart.
Due to its outstanding cleaning properties, compact mounting dimensions and ease of assembly, our System ProClean
is used by many well-known manufacturers of original equipment such as vacuum cleaners, pneumatic conveyor systems,
drilling and grinding machines, shoe repair machines, wet/dry vacuum cleaners and wall sander.
System ProClean flat pleat filter
with trapped dust, before cleaning.
Outstanding cleaning properties due
to movable, widely spaced pleats.
System ProClean flat pleat
filter after cleaning.
Filter elements for wire, sink
and starting hole erosion units
Choose from our comprehensive program
• Lamellar and cartridge filters
• Galvanized and varnished versions
• With or without coupling
HENGST erosion filters protect the dielectric from
material removed from the working part or electrode,
preventing contamination which could lead to
malfunctions in the erosion process or even short
circuits between the working part and the electrode.
The long service life and improved resistance to collapse
are due to pleats with patented HENGST paper embossing.
Erosion filter elements are available with filter ratings
of 2 to 30 micrometers.
ZIMMER & KREIM
Filter Elements for Special Applications
Fast, flexible solutions –
even for new applications
Examples of solutions already successfully implemented for special applications:
Filter elements for radiant heaters for livestock
These filters provide intake air filtration for gas heaters.
The filter elements are washable due to the use of polyester media.
Maximum safety is guaranteed by the use of materials resistant
to high temperatures.
Filter elements for rainwater filtration
Cyclone filters with patented support ribs ensure an efficiency of
more than 95 %. Adhesion forces draw the fluid through the filter
fabric to the clean water side.
Filter elements for switch cabinet air conditioning
Innovative, patented pleat filters permit a significant increase
in air filtration performance, while complying with protection
class IP55. The pleating also increases the service life, thus
lengthening service intervals.
We will be glad to find
a solution for your
application that meets
Quality is Evident in the Details
Filter materials and processing
at the highest level
Reliable filtration with a high separation rate and long
filter service life is provided by a large selection of BGIAapproved
filter media, such as cellulose, synthetic fiber
materials and glass fiber media.
Additional options are also available to meet your
requirements, including hydrophobic, oleophobic,
flame-retardant, conductive, antistatic and nanofibre
materials, as well as PTFE membranes.
To complete the quality program, optimal pleat
geometry is ensured by embossed distance holders
or adhesive beads applied online, in addition to
polyester band, expanded metal, perforated plate
or net stabilization.
All products are thoroughly tested
at HENGST via extensive measurement
and testing facilities.
Embossed distance holders
Stabilizer bands Expanded metal stabilizer Perforated plate stabilizer Net stabilizer
A good foundation
In addition to years of experience, state-of-the-art
technology is also essential in order to achieve an
optimal selection of filter media.
For example, media characteristics in accordance with
VDI 3926 are determined via long-term dust testing.
An investigation under realistic conditions is carried
out in four phases.
Differential pressure and residual dust content values
are recorded during the entire test. The test parameters
can be adapted to the design and operating parameters
of the filter system.
Based on the test characteristics, the following
values are determined:
• Cleaning intensity
• Dust cake formation
• Average residual dust content
• Degree of cleaning
• Total test duration (characterizing the service life)
By means of individual testing, the optimal filter medium
for a particular application can be selected. The foundation
is provided by cellulose, synthetic and glass fibers, which
are combined and processed as required for the application.
Service life is decisively improved by nanofiber technology
Nanofibers combine exceptionally good cleanability with high air permeability. When they are used in conjunction with
pneumatic cleaning systems, previously unattainable service lifetimes can be achieved.
Differential pressure after cleaning
New condition 1 2 3
Filter media with and without nanofibers
194 082 102
Hengst GmbH & Co. KG
Nienkamp 55 - 85
Tel. + 49 251 20202 - 228
Fax + 49 251 20202 - 170