Waterproof-type Actuators (Flood resistant)

• Applied units: SMB and JMB

• Water resistance: Operable within 10 m underwater for up to 72 hours

• Precautions:

  • Ensure proper connection of electric wires to prevent water ingress through the wire port during floods, which may reduce insulation performance.

  • Overhaul is not required after each flood (which usually occurs only a few times a year), but annual overhaul is recommended.

  • For seawater applications, additional anti-corrosion measures are required.

Sulfidation Resistant Actuators (for geothermal power plants)

• Main application: Designed for geothermal power generation facilities.

• Usage considerations:

  • Sulfidation treatment varies depending on on-site conditions; please provide details of the operating environment in advance.

  • If the sulfurizing gas atmosphere is weak, or if nitrogen gas is injected into the electric room during installation or inspection, the effectiveness of sulfidation treatment will be reduced.

Heat Resistant Actuators

• Functionality: Capable of electric operation for a specified duration even when surrounded by fire.

• Applied unit: SMB

• Fire-resistance performance (based on fire simulation test):

  • Flame temperature: 1,200°C – 1,400°C

  • Operable for 15 minutes after ignition

Cold Resistant Actuators

Two grades are available depending on the ambient temperature:

• Cold resistant type I: From –20°C to –40°C

• Cold resistant type II: From –40°C to –60°C