There are two proven methods of operating an actuator even in the case of a power outage: The method in which a DC motor is used, and the method in which an air motor is used.
Historically, DC motor-type actuators have been used for emergency isolation valves in many power plants, as well as water supply and sewerage systems.

• 1. High starting torque characteristics appropriate for valve characteristics
• 2. Motors to which the line starting method is applicable
  Because the motors to which the line starting method is applicable do not require current-limiting resistance at the time of starting nor a switching circuit, which are required for general-purpose DC motors, the circuit can be simplified.

• 1. Excitation type, self-excitation/cumulative compound type
• 2. Power supply
  100 V, 110 V, 115 V
  200 V, 230 V, 250 V (options)
  3. Size (Output: Based on starting torque)
  #2, #5, #7.5, #10, #15, #25, #40, #60, #80, #100, #150, #200
  4. Hours of operation (Short-time rating)
  20 % load (Intermediate load)　#2 to #25: 15 mins　　#40 to #200: 5 mins
  40 % load (Intermediate load)　#2 to #25: 7.5 mins　　#40 to #200: 2 mins
  5. Brake (Option)

Explanation on symbols

R/C: Reversible electromagnetic switch
51H: Thermal relay heater
R: Discharge resistance
(Note 1) External wiring to E2 terminal is prohibited.
(Note 2) R represents discharge resistance.
(Note 3) When the motor size is #7.5 and larger (with interpole), B2 is used instead of A2 as the terminal marking.