Suction filter
RE 51491
Edition: 2021-04
Type S 8 to S 455 Replaces: -
▶ Nominal size 8 ... 455
▶ Connection up to G 3
▶ Filter rating from 10 µm nominal
Features Contents
Suction filters are used in hydraulic systems for separating Features 1
solid particulate from hydraulic and lubrication fluids. The Ordering code for suction filter 2
suction filters are designed to be screwed into the suction Filter design 3
line on pumps or inside reservoirs. Symbols 4
▶ Cleanable wire mesh filter media. Function, section 4
Information on filter material configuration is available Technical data 5
in RE 51548. Dimensions 6
▶ Filtration of hydraulic fluids and lubricants Assembly, commissioning, maintenance 7
▶ Filtration of industrial fluids Tightening torques 7
▶ Direct installation into suction lines Environment and recycling 7
▶ Direct wear protection of pumps Guidelines and standards 8
▶ Bypass valve and return flow protection possible Intended use 9
Improper use 9
RE 51491, edition: 2021-04, Hengst Filtration GmbH
2/10 S | Suction filter
Ordering code
Suction filter
01 02 03 04 05 06 07 08 09
S ‒ S00 ‒ ‒ 00 0 0
Design
01 Suction filter S
Frame size
02 S.. 8
16
28
45
75
115
175
280
455
Nominal filter rating in μm
03 Stainless steel wire mesh, cleanable G10
G25
G40
G60
G100
G130
G200
G500
G800
Element design
04 Standard adhesive T = 100 °C S00
Solenoid / bypass valve / maintenance indicator
05 without solenoid, without bypass valve, without maintenance indicator 000
without solenoid, with bypass valve 0.3 bar, without maintenance indicator, not configurable with check valve 010
Port
06 Standard 00
Seal
07 without 0
Material
08 Standard 0
Supplementary information
09 without 0
Check valve 0.02 bar, only possible with frame size 75, 115, 175, 280, 455; not configurable with bypass valve V
More detailed information on Hengst filter material configuration is available in RE 51548.
Order example:
S45 G100-S00-000-00000
Hengst Filtration GmbH, RE 51491, edition: 2021-04
Suction filter | S 3/10
Filter design
Easy selection of the filter size is made possible by the FilterSelect online tool. The filter can be designed using the
operating pressure, flow and fluid system parameters. The required filter rating is based on the application,
the sensitivity to contamination of the components and the environmental conditions.
The program leads you through the menu on a step-by-step basis.
A documentation of the filter selection can finally be created in the form of a PDF file. This file contains the entered
parameters, the designed filter with material number including spare parts, and the pressure loss curves.
Link FilterSelect:
http://www.filterselect.de
Other languages can be selected using the page navigation.
RE 51491, edition: 2021-04, Hengst Filtration GmbH
4/10 S | Suction filter
Symbols Function, section
Suction filters are used in hydraulic systems for separating
solid particulate from hydraulic and lubrication fluids. They
Filter symbol with Filter symbol with are intended for the direct attachment to suction lines
bypass reverse flow check
valve The suction filter consists of a combination of star-like
pleated filter media (4) which is wrapped around a
perforated support tube (3). The suction filter is sealed in
a longitudinal direction, using a 2-component adhesive.
The support tube and filter element mesh-pack are glued
to the upper part (1) and the end caps (2).
1
3
Hengst Filtration GmbH, RE 51491, edition: 2021-04
Suction filter | S 5/10
Technical data
(for applications outside the stated values, please consult us!)
general (net weights refer to versions without bypass and check valve)
Weight NG 8 16 28 45 75 115
kg [lbs] 0.1 0.12 0.14 0.24 0.3 0.45
[0.22] [0.27] [0.31] [0.53] [0.66] [0.99]
NG 175 280 455
kg [lbs] 0.58 1.46 1.6
[1.28] [3.22] [3.5]
Operating temperature range °C [°F] ‒20 … +100 [-4 … +212]
Storage conditions °C [°F] ‒40 … +65 [‒-40 … +149]; max. relative air humidity 65%
Material ▶ Upper part Polyamide with frame size 16 to 175
Aluminum with frame size 8, 280 and 455
▶ Support tube Galvanized steel
▶ Base Galvanized steel
hydraulic
Flow direction from the outside to the inside
Maximum differential pressure bar [psi] 1 [14.5]
Compatibility with permitted hydraulic fluids
Hydraulic fluid Classification Standards
Mineral oil HLP DIN 51524
Bio-degradable – insoluble in water HETG
VDMA 24568
HEES
– soluble in water HEPG VDMA 24568
Flame-resistant – water-free HFDU, HFDR VDMA 24317
Important information on hydraulic fluids!
▶ For further information and data on the use of other hydraulic
fluids, please refer to data sheet 90220 or contact us!
RE 51491, edition: 2021-04, Hengst Filtration GmbH
6/10 S | Suction filter
Dimensions
(dimensions in mm)
Type Dimensions (mm)
ØA B B1: C ØD: SW
For version with For version with
check valve check valve
S8 40 45 G 3/8 24
S 16 57 60 G 1/2 36
S 28 57 90 G 3/4 36
S 45 77 95 155 G1 55 55
S 75 77 130 190 G 1 1/4 55 55
S 115 109 135 189 G 1 1/2 75 75
S 175 109 180 234 G2 75 75
S 280 150 169 254 G 2 1/2 105 105
S 455 150 249 334 G3 105 105
Hengst Filtration GmbH, RE 51491, edition: 2021-04
Suction filter | S 7/10
Assembly, commissioning & maintenance
Assembly
Install the suction filter directly to the suction line of the pump. Vertical installation preferred.
Commissioning
Commission the system.
Maintenance
▶ If the suction filter is contaminated (recommendation max. 0.3 bar underpressure (absolute)), it should be replaced
or cleaned
▶ Switch off the system
▶ Screw off the suction filter
▶ Replace or clean the suction filter
▶ Suction filters made of wire mesh can be cleaned. The cleaning process requirements depend on the type of
contamination and the differential pressure obtained before the suction filter service interval
For detailed cleaning instructions, refer to data sheet RE 51548
▶ Install on the new or cleaned suction filter
The torque specifications ("Tightening torques" section) are to be considered
▶ Commission the system
Tightening torques
(dimensions in mm [inch])
Series suction filter S... 8 16 28 45 75 115 175 280 455
Suction filter 25 Nm ± 10 Nm
Environment and recycling
▶ The used suction filter has to be disposed of according to the country-specific legal regulations for environmental
protection.
Notice: Warranty expires in the event that the delivered item
▶ If the recommended differential pressure is is changed by the ordering party or third parties or
disregarded, the disproportionally increasing improperly mounted, installed, maintained, repaired,
differential pressure may damage the suction filter used or exposed to environmental conditions that do
(collapse). not comply with the installation conditions.
RE 51491, edition: 2021-04, Hengst Filtration GmbH
8/10 S | Suction filter
Guidelines and standards
Product validation
Hengst filters are tested and quality-monitored according to different ISO test standards:
Compatibility with hydraulic fluid ISO 2943:1998-11
The development, manufacture and assembly of Hengst industrial filters and Hengst filter elements is carried out
within the framework of a certified quality management system in accordance with ISO 9001:2015.
Use in potentially explosive atmospheres according to directive 2014/34/EU (ATEX):
The suction filters are not equipment or components in the sense of directive 2014/34/EU and are not provided with
the CE mark.
It has been proven with the ignition risk analysis that these suction filters do not have own ignition sources according
to DIN EN ISO 80079-36.
The suction filters can be used for the following potentially explosive atmospheres:
Zone suitability
Gas 1 2
Dust 21 22
WARNING!
▶ For use of the suction filters in potentially explosive is to be removed from the suction filter outside
atmospheres, ATEX suitability of the complete filter the potentially explosive atmosphere.
assembly is an imperative requirement. ▶ Maintenance to be conducted only by specialists, as
▶ Conductivity of the medium: at least 300 pS/m per the instruction by the machine end-user according
▶ During suction filter exchange, the packaging material to DIRECTIVE 1999/92/EC Appendix II, section 1.1
Hengst Filtration GmbH, RE 51491, edition: 2021-04
Suction filter | S 9/10
Intended use
The suction filters serve as components as per the EC Machinery Directive 2006/42/EC in hydraulic machinery for
the separation of dirt particles.
The suction filters are to be used under the following boundary conditions and limits:
▶ only in hydraulic systems with fluids of group 2, according to Pressure Equipment Directive 2014/68/EU
▶ only according to the application and environmental conditions in the chapter "Technical data"
▶ only with hydraulic fluids and the intended seals according to the section "Compatibility with hydraulic fluids"
▶ Use in potentially explosive atmospheres according to the chapter "Guidelines and standards"
▶ Compliance with application and environmental conditions according to the technical data
▶ Compliance with the specified performance limits
▶ The suction filters are intended exclusively for professional use and not for private use
Improper use
Any use deviating from the intended use is deemed as improper and thus not admissible.
Improper use of the suction filters includes:
▶ Incorrect storage
▶ Incorrect transport
▶ Lack of cleanliness during storage and assembly
▶ Incorrect installation
▶ Use of inappropriate/non-admissible hydraulic fluids
▶ Operation outside the approved temperature range
▶ Installation and operation in inadmissible device group and category
Hengst Filtration GmbH does not assume any liability for damage caused by improper use. The user assumes all risks
involved with improper use.
RE 51491, edition: 2021-04, Hengst Filtration GmbH
10/10 S | Suction filter
Hengst Filtration GmbH © This document, as well as the data, specifications and other information
Hardtwaldstr. 43 set forth in it, are the exclusive property of Hengst Filtration GmbH. It may not
68775 Ketsch, Germany be reproduced or given to third parties without consent of Hengst Filtration
Phone +49 (0) 62 02 / 6 03-0 GmbH. The data specified above only serve to describe the product. No
hydraulicfilter@hengst.de statements concerning a certain condition or suitability for a certain application
www.hengst.com can be derived from our information. The information given does not release the
user from the obligation of own judgment and verification. It must be
remembered that our products are subject to a natural process of wear and
aging.
Hengst Filtration GmbH, RE 51491, edition: 2021-04
