GMN International GmbHis the worldwide leading supplier of Test Stands and test equipment used mainly in automotive and filter
industries. Our core competence lies in the development and the production of test equipment that is used
for testing various kinds of filters.
Our special testing machines and equipment are produced on the highest technological standards and isadjusted to your special requirements and needs. We manufacture our products at our own plant locatedin Hatzfeld, Germany. Also a very extensive network of partners, who provide us with expert assistance,
distinguishes us from our competitors.
Over the past few years, GMN International GmbH has supplied nearly every well-known filter
manufacturer with testing equipment of a different kind.

ideas become reality
www.gmn-gmbh.net

Test Stands • Customized Machines and Systems

Our products for Automotive- / Industrial Filter Manufacturer and R&D Center:– Multi Pass Test Stand acc. ISO 16889– Oil filter Test Stand acc. ISO 4548 (SAE HS 806)
– Fuel filter Test Stand acc. ISO 4020
– Fuel filter Test Stand acc. ISO 19438– Dry tightness Test Stand for different kind of filter application– Oil separator Test Stand acc. ISO 12500 und ISO 8573
– Customized machines and systems

Multi Pass Test Stand (ISO 16889, ISO 19438 & ISO 4548-12)

Other products and service:– Service & maintenance– System validation and calibration

Experience in the field of testing and production equipments since 1990
First Multi Pass Test Stand acc. ISO 4572 in 1994
Customer in Europe and USA:

Customer in Asia:– 3M– Ahlstrom USA– Argo Hytos– Baldwin Morocco– Boll + Kirch– Bosch– Brano– Donaldson Poland– Freudenberg– Hengst– Hollingsworth & Vose (Hatzfeld)– IBS Filtran– J.C. Binzer– Knowlton Technologies LLC– Mahle– Mann + Hummel– Neenah Gessner– Saati– Sefar– Unitech– Vorwerk– VW / SGS– Wix Dana

– Ahlstrom Korea– Anhui Phoenix International Co., Ltd– Brano Ningbo– CAF Changchun (now Freudenberg)– China Changchun Mann+Hummel Faway Filter Co. Ltd– China Leemin Hydraulic Co., Ltd– Chongqing Zaisheng Technology Co., Ltd– Cummins Wuhan– Factory 116 Xinxiang– FAW R&D Center Changchun– Filda Filter Corp.
– Fleetguard Shanghai– Hengst Kunshan– Hollingsworth & Vose (Suzhou) Co., Ltd.
– Mahle Shanghai– Mann+Hummel Shanghai– Mann+Hummel India– Northwest Institute for Non-ferrous Metal Research (NIN)– QAP– Shan Dong Ren Feng Special Materials Co., Ltd– Thai Yang Bangkok– Wuxi Hualing– Wuxi WeiFu– YCWY Engineering (YL) Co.,Ltd Yulin– Zhejiang Yinlun Machinery Co., Ltd

Filter types:

spin on filter, filter elements,
flatsheet filter media
Flow range:
3 loops: 0,3 – 420 l/min
Differential pressure: 16 bar
Dosing pump:
50 – 250 ml/min
Max. diluting HCB:5:1 (25 ml/min sample flow)
Max. diluting SLS:
50:1 (10 ml/min sample flow)
Flatsheet test head: 200 cm² (max. 16 bar)
Particle counter:
online particle counter (Pamas)
calibrated per ISO 11171
4 – 70 µm(c) HCB,
1,5 – 20 µm(c) SLS
32 channels up- / 32 downstream– Evaluating filtration performance of Spin on- and filter element– Evaluating filtration performance of flat sheet filter media– Particle retention ability and contamination holding capacity– Differential pressure characteristics

GMN International GmbH • Edertalstrasse 27a • 35116 Hatzfeld / Germany
phone: +49 (0) 6467 915 888 • fax: +49 (0) 6467 915 879
web: www.gmn-gmbh.net • email: info@gmn-gmbh.net– The Test Stand can be also configured and quoted according

to customer individual specificationDifferential pressure / Oil filter Test Stand(ISO 4548-1 & ISO 3968)

Filter types:
Filter diameter:
Filter height:
By-pass valve connection:
Pipe diameter/type:
Flow range:
Flow sensor type:
Flow sensor size:
System pressure:
Oil temperature:
Tank capacity:
Hydraulic medium:spin on filter and filter elements
60 – 180 mm
40 – 500 mm
adapter with 3 set toolingfor 3 different by-pass valves
1"/EO2
1 - 12.000 l/h
carioles Principe
DN 4 and DN 25
0 – 15 bar
15 – 105 °C
300 lmineral to synthetic oils,
e.g. SAE oils (SAE 30 ... SAE 140)

– Differencial pressure characteristics acc. ISO 4548-1 andISO 3968
– Flow rate ramp
– Differencial pressure characteristics of by-pass valve– Opening pressure of by-pass valve– Leakage volume of by-pass valve– Features according customer technical specification canbe provided and quoted

Pulsation and burst pressure Test Stand(ISO 4548-5, ISO 4548-6 & ISO 4020-6.8)

Filter type:
Filter diameter:
Filter height:
No. of test stations:Servo valve type:
Pulsation pressure:
Pulse wave:
for sinusoid waveform:
for square waveform:
Burst pressure:
Oil temperature:spin on hydraulic, oil, fuel filter(other types are also possible)
65 – 140 mm
65 – 350 mm
4 parallel stations
company Moog®
0,2 – 40 bar
trapezoidal, sinusoidal,
special waves controlled by PLC
0,5 – 15 Hz programmable
0,5 – 3 Hz programmable0 – 140 bar
37 – 150 °C ± 12 °C– Square wave pulse test acc. ISO 4548-5– Square wave pulse test acc. ISO 4020
– Sinusoidal wave pulse test
– Static burst pressure test acc. SAE HS-806 and ISO 4548-6– The Test Stand is designed as a High Speed Dynamic

Impulse Test Stand as part of the features according
customer technical specification can be provided andquoted