Pneumatic Actuator for Diaphragm Valves in Sterile ServiceS. Himmelstein | August 21, 2017
SISTO Armaturen S.A., KSB’s Luxembourg subsidiary, plans to launch a new double-acting or single-acting pneumatic actuator at the end of 2017. It is designed for diaphragm valves used for sterile applications in the beverage, food and pharmaceutical industries.
The housing and the valve bonnet of the new MD30-MD115 actuator range are made from a single piece of material. Compared with predecessor models, this design change substantially reduces the actuator’s overall height so that less space is required to accommodate block-bodied multi-port valves. The actuators are also 45 percent lighter than the two-piece design.
In addition to the stainless steel variant, the two largest actuators, MD168 and MD202, are also available in a weight-saving aluminum design.
The actuator can be fitted to the valve body without nuts as the threads are integrated with the body to simplify mounting. The orientation of the air connection can be adjusted in 90-degree steps.
Accessories such as travel stop, positioner or proximity switches for actual-position feedback can be retrofitted by the operator, and the actuators can be replaced with manual actuation bonnets at any time.