The valves are intended for installation in pipelines in accordance with the EC guideline 97/23/EC concerning pressure devices. The type of medium (chemical, abrasive, and corrosive effect) agreed with the order and the limit values of medium pressure and temperature according to the data sheet must be adhered to. Any other additional use is not in accordance with that intended. The area of operation of the valve is under the responsibility of the plant planner. Observe special valve markings.