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multi-voltage electric valve actuator


S4 Series Universal-voltage Industrial Valve Actuators

The S4 Series is a quarter turn multi-voltage electric valve actuator which incorporates the latest advances in motor and control technology at an economical price.

The S4 unit incorporates automatic voltage sensing and allows for AC or DC supply anywhere from 24 to 220 volts. The electronic torque limiter protects the actuator and the LED status lights allow for easier field diagnostics. The domed position indicator provides a visual indication of valve position. The DIN wiring connections allow the unit to be field wired without opening the actuator.

Options include a plug-and-play analog to digital positioner and a battery “spring return” feature that allows the actuator to fail closed or fail open in the event of a power failure.


Optional Features for The S4 Series

S4 Series Electric Actuator on various valves

Features & Benefits

  • Universal Voltage:
    24 to 240 VAC/DC
  • Internal thermostat controlled anti-condensation heater
  • Isolated end of travel limit switches
  • Manual override for emergency hand operation
  • Electronic torque limiter
  • Auto-voltage sensing reduces field wiring mistakes
  • Visual domed position indicator
  • LED Status lights to indicate operational status
  • External wiring connection with DIN Plugs, no need to open unit for field wiring
  • ISO5211 mounting flange
  • CE Marked

Typical Applications

  • Ball valves up to 3"
  • Resilient seated butterfly valves up to 8"


  • Analog to digital positioner
    (4-20mA and 0-10 VDC)
  • Battery failsafe
    (fail closed or fail open)
  • Potentionmeter:
    1K, 5K,10K
  • 3 position stop
  • Cord sets or NPT DIN connectors


  • Housing (Body & Cover): Anti-corrosive Polyamide
  • Main External Shaft: Stainless Steel
  • Gears: Steel & Polyamide
  • Indicator: Glass Filled Polyamide
  • Internal Cams: Glass Filled Polyamide
ISO 5211 Direct Mount Connections
  • Sizes 170 and 300: F03 / F04 / F05
  • Sizes 480 and 750: F05 / F07
  • Sizes 1200 and 2600: F07 / F10
  • Female drive shaft connection
Electrical Connection
  • External PG9 Cable gland DIN plugs
  • NPT conduit or corded connectors optional
Temperature Range:
  • -4°F to 158°F
Weatherproof Enclosure Rating:
  • IP67
Electric Motor:
  • Single Phase
Duty Cycle:
  • 75%
Thermostat Controlled Heater:
  • 3.5 W
  • Class B
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