OHE Maschinenbau GmbH is situated in Hattingen, Germany. Together with roof supports manufacturers we create a secure working environment for safe coal mining.
Today we develop and manufacture hydraulic, electrohydraulic and pilot control systems with all auxiliary hydraulic locks and valves, as well as connectors and fixtures for high pressure hoses.
Also, we provide qualified servicing, repair works, warrantee and post-warrantee maintenance that result in the extension of life expectancy of the equipment and therefore allow saving on investments.
OHE’s products are manufactured according to the highest quality. They pass a multi-stage monitoring system of quality control confirmed by certificates DIN EN ISO 9001 and have equipment application permits in underground mines, including conditions of explosive gas and a hazardous dust.
They were also certified by the Mining Products Safety Approval and Certification Center according to the MT419-1995 standard in China.
Electrohydraulic control unit
The electrohydraulic control units is specially designed equipment for operating underground longwalls.
Pressure relief valves
Pressure relief valves are used to limit the pressure in hydraulic circuits (cylinders or supply lines) to a specified maximum value (called setting pressure of the pressure relief valve).
Solenoid valves are used as pilot valves to execute electric signals and transform them into hydraulic impulses.
In our list of parts for the exhibition, the 4/3 way solenoid valve and 350-500 bar DN 20 pressure relief valve are newly designed and produced.
According to practical experiences, it is known that underground environment contains lots of water and other acidic/alkaline solutions, which will cause corrosion to the valves. Therefore to maintain a smooth operation and long life cycle, the new design had improved its rust-resistant ability.
We are also producing a new unload valve for pump stations. This new valve can operate under a pressure of about 375 bar (37.5MPa). It is suitable for pumps with up to 1000 kW power and 1340 L/min flow rate. These characteristics make this valve also capable for other heavy duty applications.
For other products in general, some changes are made on the connections and dimensions to ensure easy assembly and maintenance, especially when they are used underground. There are also some improvements to prevent malfunctioning and enhance performance. Those changes are made to fulfill customers’ requirement, and provide them with high quality and safe products that are also easy to use.
OHE Maschinenbau GmbH
Phone: +49 232 456440
Fax: +49 232 4564444
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