 |
| GEMÜ |
This firm has introduced a new motorized open/close actuator for globe and diaphragm valves. The 24-V d.c. actuator (photo) is an alternative to current designs and also to solenoid valves. Valves using this actuator are especially suited to applications without plant air. Also, the operating costs of the motorized actuator are said to be lower than those of a comparable pneumatic actuator or even a solenoid valve. The actuating speed is between 4–10 mm/s, depending on the nominal size. The S680 diaphragm valve, for example, closes in about 0.5 s in nominal size DN 15, and about 2 s for DN 25. The design of motorized diaphragm valves makes them insensitive to particles and solids in the medium — even grains of sand and pieces of lime scale in water pipes impair neither the function nor the tightness of the valves. — GEMÜ Gebrüder Müller Apparatebau GmbH & Co. KG, Ingelfingen-Criesbach, Germany