The Fisher 667-30 is a spring-opposed diaphragm actuator designed for precise valve control in industrial applications. It belongs to the 667 series, known for robust performance and compatibility with various valve types.

 Key Specifications of Fisher 667-30 Actuator

• Actuator Type: Pneumatic diaphragm, spring-opposed
• Size: 30 (smallest in the 667 series)
• Action: Direct-acting (push-down-to-close) or reverse-acting (push-down-to-open), depending on valve configuration
• Maximum Supply Pressure: Typically up to 2.4 bar (35 psig), depending on spring range and construction
• Travel Range: Commonly 19 mm (0.75 in) for size 30
• Bench Set: Adjustable spring compression to set desired travel range and fail-safe position
• Mounting: Designed for top-mounted installation on compatible control valves
• Materials: Corrosion-resistant steel and elastomers for diaphragm and housing
• Manual Override: Optional handwheel or travel stop for manual positioning
• Applications: Ideal for throttling or on-off control in chemical, power, oil & gas, and water treatment industries