Welcome to Hartmann Technology,   In addition to ball valves for the high-pressure and wellheads applications Hartmann Technology offers complete and tailor-made solutions for all your valve and actuator needs.                                                                     Valves                o Ball valves o Pig valves o Check valves o Butterfly valves o Plug valves        Actuation   o  Pneumatic -  Rack & Pinion Design -  Scotch-Yoke Design o Electrical -  Spring return Design -  Open / close Desing -  ET 25 Electrical                                                               ET25 The electrical actuator ET25 is designed to motorize valves in gas & fuel oil systems used in gas turbines (power plants).   further information