Roetelmann

Conventional ball valves utilize elastomeric or mechanical stem seals to contain the transmitted medium. If these seals fail, the medium escapes to the environment. This is a grave concern if the medium is a potential environmental pollutant or health hazard. The Roetelmann design eliminates this potential by encapsulating the stem and seals in a welded canister, should the seals fail the medium cannot escape to the atmosphere. Previous designs were unable to provide an indication that the internal ball had rotated to the desired open or closed position when the valve was actuated. The inclusion of a non-contact sensor has provided a technical solution for this problem. The valves are produced with a variety of construction and seal materials to meet customer requirements. Welded or flanged end connections, locking devices to meet OSHA requirements and actuators are available.