Armak Ltd was founded in 2007 as a joint venture by

Krisch-Dienst GmbH and The Water Hydraulics Co. Ltd. Armak Ltd designs, manufactures, assembles and tests Air, Gas and Steam Motors at it’s manufacturing facility in Hull,

East Yorkshire, UK.


Armak Ltd currently manufactures Air Motors from 2kW to 16kW, Gas & patented Steam Motors from 2kW to 30kw. The complete range of motors can be supplied with patented valves and control systems, enabling accurate control and operation in all environments. The Air Motors can be supplied in accordance with ATEX Directive 94/4/EC, for use in potentially explosive environments for example in the offshore or mining industry.


Armak Ltd engineers have over 30 years experience in supplying complete drive solutions from a single source. All products are supplied globally in accordance with customers exacting requirements and worldwide legislation.







Armak Ltd has been continually developing a contact free rotary piston design of geared piston motor. The motors simple and compact design gives a longer lifespan with low operating and maintenance costs. The Armak motor range covers an extensive range of applications, they can also directly replace the RM radial piston motor offering greater power output.


The torque is developed by one power piston which is transferred to the output shaft by a second contact free rotating piston via a precision synchronized gear train. Both pistons rotate without physical contact resulting in near frictionless operation producing torque efficiencies in excess of 98%.The result being long maintenance free operation without downtime. The totally closed motor housing without breather holes permits applications in wet or dirty surroundings without corrosion inside the motor.


Armak building block design allows simple configurations to suit the individual application criteria. Control valves including Remote, Lever and Emergency stop are all bolt on options, Industry standard Brakes, Gears and Silencers are also available.



Armak Ltd. Alexandra house, English street, Hull, East Yorkshire, UK, HU3 2DJ

Phone: +44 (0)1482 595 000 Email: