Cellular Gas Filters for Hydrogen application!

In recent years, we confirm that we have supplied our ZFG/ZEFG Cellular Gas Filters from the spherocasting material several times for hydrogen applications. As today, we have not received any negative feedback on these projects.

The functional suitability for use with hydrogen has so far been confirmed by our customers.

The hydrogen content in natural gas is currently limited to < 10% (DVGW worksheet G 260:2013/G 262:2011 ), further requirements of the DVGW regulations on special required additional tests for the use of hydrogen are not available to us at this time.

At an independent institute, we have tested our Cellular Gas Filters of the types ZFG/ZEFG (spherocasting) and VZF/VZEF (aluminum casting) were subjected to a hydrogen emission test based on DIN EN ISO 15848.

The requirements of DIN EN ISO 15848 (max. 50 ppmV leakage) were met and even significantly exceeded.

Based on several years of experience of the use of our Cellular Gas Filters type ZFG/ZEFG for hydrogen as well as the successful emission test of all types, we evaluate our type-tested Cellular Gas Filters type ZFG/ZEFG and type VZF/VZEF as suitable for use in hydrogen plants.

On customer’s request, we are happy to carry out an additional leak test with helium.

We would like to point out that the suitability of the application for operation with natural gas-hydrogen mixtures with a hydrogen content of >10 vol-% up to 100% has to be determined by a risk assessment of the application operator before commissioning.


NEW! DVGW-Certificate for Cellular Gas Filters

made from Silumin Cast and Cast Iron :
Type Variants VZF/VZEF/ZFG/ZEF

In November 2017, we received our new DVGW certificates for extended application ranges of our cellular gas filters.

The extensions of the newly approved applications require no additional TÜV approval.

The new certificate acc. to EC Pressure Equipment Directive in German and English for the design in straight and corner type variants you can find here.

Cellular Gas Filter Typ Variants at a Glance:

All filter types, cast silumin and cast iron, are now available for an application range up to -20 ° C.
Again in the portfolio are our cast iron filters for PN40 in nominal sizes DN25-DN80.
Furthermore, the maximum pressure PN16 of cast iron cellular gas filters was approved for the operating temperature of -40 ° C, also for nominal sizes DN150.

Our updated new leaflets you can download here:


EU/2016/426 (GAR) certified for cellular gas filters

NEW! Differential Pressure Monitoring DP900 – Compactly Mounted!

Block Valve with Bypass:

For simple and compact installation of our DP900 differential pressure gauge, we have developed a block valve with bypass function.

The valve block is equipped with a fine filter and 2 pieces of DVGW-approved shut-off ball valves. The entire unit is completely assembled to your filter. Any piping and on-site adaptation is not applicable anymore. With the delivery you will receive a certificate according to EN10204 / 3.1 for the complete unit.

Your benefits at a glance:

# easy installation

# compact design

# with bypass

# with integrated fine filter

# optional with reed contact

# flow direction: right / left or left / right

# optional with special scale

Fair: GAT|WAT Cologne, 28.-30.11.2017

Fair Invitation: GAT|WAT in Cologne, Germany – November 28th – 30th 2017
We will be present for you! Boost C-004, Hall 7

Once a year, the entire spectrum of experts in gas and water management meet
the largest trade fair and accompanying trade fair in Germany, the GAT | WAT.

You are cordially invited to meet us at standour boost C-004 in hall 7 in person.
For the first time, you will find us, the company Thielmann Energietechnik GmbH, as an exhibitor at the trade fair in Cologne.

Get the latest information on our product innovations of cellular gas filters and type DP900 differential pressure gauge.
In addition you will receive solutions in a personal conversation with us for gas filtration and preheating
for your gas engineering systems in the project business.

Visit us during your stay at our booth.

We are looking forward to interesting interviews with you!
Yours Management Board and Sales Team!

01.09.2015 Company Information

Change of Company Ownership – Thielmann Energietechnik GmbH

We are pleased to inform you about the changes in ownership at Thielmann Energietechnik GmbH. Through a management buy-out, the company will operate independently of ‘Itron’ from now on. All existing agreements and business commitments remain effective. You are also welcome to contact your trusted partner.

With immediate effect our bank connection changes. Our e-mail address ending changes to: gts-thielmann.de.

Mr Rémy Brill will be the new managing director. Mrs. Carmen Ronkowski is available to you as authorized officer (proxy).