KELLY Valves for safe drilling and production operations

New standard in the field of Kelly Valves - already successfully used


Primus Award for the new, patent pending pigging ball valve

Hydrogen Ready?!

H2 Ball Valves, Wellheads and Tests –The right selection of materials and reliable leak-tightness tests ensure safety

Why ball valves instead of gate valves at the wellhead?

Managing director Werner Hartmann explains the technical and commercial advantages of using ball valves instead of gate valves at the wellhead.

Our metal-to-metal sealing ball valves fulfill a leak rate of A or 0.

Ball valves

Metal-to-metal sealing ball valves, also for demanding conditions

Our high performance valves guarantee the highest level of safety and availability. Designed to individual customer requirements they resist aggressive media, extreme pressures, temperatures and high cycle operations. The metal-to-metal sealing between ball and seat ring provides an especially long service life and minimizes the requirements on maintenance. Besides the conventional ball valve designs we also produce pig valves and twin ball valves for increased safety requirements as well as multi-way ball valves. We develop special tailor made replacements for existing valves.

to the ball valves
A reliable combination: Hartmann wellheads with gas-tight ball valves provide an especially high level of safety and long service life.


High stability and low maintenance are what distinguishes our equipment.

Our API 6A conformant wellheads are designed to the highest requirements and have been deployed for decades in oil and gas production, storage technology and deep geothermal energy. Produced from high quality materials they are equipped as standard with metallic sealing ball valves. Due to an integrated design, not only is the installed height and weight minimized but by saving on flanged connections the safety is improved above all. An experienced service team is available around the clock for assembly service, repairs and maintenance work.

to the wellheads
The Hartmann Kelly Valves are characterised by their longevity and durability.

Kelly Valves

Kelly valves for safe drilling and production operations

Our Kelly Valves according to API 7-1 are used as safety valve in the drilling rig. Technically, they are characterised by a wide temperature range from -46°C to +180°C (L/X), class 2 as standard and by their longevity and resistance to higher differential pressures. Hartmann Kelly Valves are available in different lengths, outside and inside dimensions and thread types. They are manufactured and tested according to API specification 7-1 and in compliance with IS0 9001:2015. Hartmann offers an all-round package including short term delivery, stocking in Germany, spare parts and overhaul.

to the Kelly Valves
Oil /Gas Production
Wellheads und valves for demanding conditions
Storage Technology
Wellheads with integrated ball valves for storage
Chemical /Petrochemical
High performance ball valves for extreme conditions
Geothermal Energy
Approved and tested wellheads for deep geothermal energy
Renewable Energies
Pure metallic sealing ball valves for innovative power-to-gas plants
Power Plant Technology
High performance valves for water, steam and gas turbines


Challenging application? We support you with industry-specific expertise, innovative solution concepts and reliable products.


What distinguishes us

We start where the range of standard products ends: Hartmann develops tailor made high performance components of the highest quality. Safe. Reliable. Long-lasting.


Our sales and design engineers eagerly await your enquiries from the high performance sector. In close collaboration we develop suitable components for your special applications.

Solutions for
extreme areas

Hartmann ball valves and wellheads are designed for pressure classes up to 690 bar, temperatures from -200 to +550°C as well as for high cycle operations and media of all types.

that pays

Durable and low maintenance products reduce the life cycle costs of your plants. This is why we develop, assemble and test exclusively in Germany.

Expertise & consultation
from a single source

You profit from more than 70 years experience during all project phases. We provide you with support, from consulting, development right through to installation and maintenance service.

Hartmann Valves in the third generation

Quality for three generations – our customers have thanked us with loyalty over decades and interesting application reports.

→ Read press release

Martin, Werner and Christian Hartmann
Managing directors of Hartmann Valves GmbH since 1.1.2018

Innovative conversion in ammonia plant

In this project we could take no risks. With a wrong manufacturer we would have endangered the entire conversion both technically and in terms of time scale.

→ to the reference

Jürgen Rommel
Yara Brunsbüttel GmbH

freie Stellen und Ausbildungsplätze


Do you have any questions?

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Or call us or send us an e-mail. We look forward to your inquiry. You can reach us by this phone number: +49 5085 9801 0.

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