Asco Joucomatic has produced a new range of modular positioner units for the E290 and E390 ranges of process valves, used in the process, food, pharmaceutical, automotive, water treatment and medical industries. It aims to provide a cost effective, space-saving and flexible method of achieving precise proportional control of liquids and gases. The introduction of the compact analogue 605 Series and the digital Posimatic 606 Series positioners extends the application range of the E290 and E390 valves beyond sterilising, fluid mixing, dosing, diverting, separating and recycling tasks, providing greater functionality to perform precise proportional regulation where the flow of a liquid or gas needs to be controlled. Typical applications that fall into these categories include: regulation of temperature systems (textile, laundry, sterilizers, exchangers etc); mixing product processes (food industry, chemical industry, pharmaceutical industry etc); and measuring systems (tank filling etc). The most compact of the positioners – and probably the most compact of such positioners on the market – is the Series 605 analogue unit. The Series 605 is a low-cost positioner that mounts directly onto E290/390 valves. It has been designed mainly for use with actuators that do not require significant airflow. For greater levels of accuracy, the Series 605 operates in closed loop mode, comparing the stroke signal to a set point signal from a potentiometer.
