Standardised with our range of high quality ARI DP pneumatic actuators, they are an ideal option for large size weir type and straight-through diaphragm valves. ARI DP pneumatic actuators are linear, single acting, of the diaphragm and spring type, with a visual position indicator, emergency handwheel and modularity for fitting all kinds of control accessories. They can be supplied either normally open or normally closed. We offer a wide variety of models for every differential pressure condition. If the actuators are supplied with an electro-pneumatic positioner, they can perform control functions and connect to the plant DCS. Contact our application engineers. www.comeval.es