Single effect electro-hydraulic actuator spring return suitable to open and close the valve by a electric motor operated by on-board hydraulic power unit which provide the modulating or on/off service and the fail safe emergency operation. ASES actuator may be coupled to every type of valve having an angular stroke of 90 deg.

Main features:
• Rack and pinion design
• Valve coupling according to ISO 5211 standard
• IP 67 waterproof execution according to IEC 144
• Operation environment temperature from –15 to +70° C
• Electro-hydraulic emergency fail safe system
• ON-OFF or impulsive modulating service
• On board hydraulic power control unit
• Electric motor – standard voltages 110 Vdc / 400 Vac / 480 Vac
• Auxiliary emergency voltage – standard 24 Vdc / 110 Vdc / 110 Vac
• Adjustable emergency speed from 1 to 30 s
• Electronic control board
• Hand pump for manual operation
• Preloaded compression spring suitable to assure total opening or closing of the valve at maximum Delta P
• 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)
• Open/ Closed limit switches
• Local and remote control