ASP – ASP/R actuators are manufactured to open or close the valve by means of electric motor. The actuator is composed by two unit : first electro-mechanical and second mechanical-hydraulic; the fail safe emergency action (open or closed) is assured by a spring return device. ASP – ASP/R actuators may be coupled to every type of valve having an angular stroke of 90 deg. Main features: • Rack and pinion design • ON-OFF or Modulating service • Valve coupling according to ISO 5211 standard • IP 67 waterproof execution according to IEC 144 • Operation environment temperature from –15 to +70° C • Electro-mechanic emergency fail safe system • Electromagnetic claw clutch for emergency operation (standard voltages 230Vac/24 Vdc or 110 Vdc) • Adjustable emergency speed from 5 to 30 s • Preloaded compression spring suitable to assure total opening or closing of the valve at maximum Delta P • Handwheel for manual operation • Electric equipment according to CEI rules Options : • Position transmitter signal 4÷20 mA (ON/OFF service or impulsive modulating) • Position transmitter and electronic positioner signal 4÷20 mA (Modulating service) • Torque switch – Open/ Closed limit switches • Local and remote control • Fieldbus system communication