Specifications: Model: 1078 (Spring-Return), 1078D (Double-Acting) Type: Piston Actuator, Scotch-Yoke design Action: Spring-Return (1078) / Double-Acting (1078D) Standard Travel: 90° and 180° rotation (other angles available) Air Supply Pressure Range: 3.0 to 8.6 bar (40 to 125 psig) for spring-return models. Up to 10.3 bar (150 psig) for double-acting. Ambient Temperature Range: -20° to 85°C (-4° to 185°F) with standard lubricant. Optional lubricants available for lower temperatures. Mounting Position: Any position. Mounting base can be rotated in 5° increments. Torque & Spring Output: Torque Output: Available in multiple spring ranges to provide specific breakaway and running torque values. Output is a function of air supply pressure and spring size. Example: A typical 1078 size 90 actuator can produce a spring-end torque of over 4,000 Nm (3,000 lb-ft). Spring Ranges: Multiple spring packs are available to match the specific torque requirements of the valve. Physical Data (Typical for a Size 90): Body Material: Anodized Aluminum Piston Rod & Yoke: Hardened Steel Weight: Varies significantly with size and spring configuration. Can range from approx. 70 kg (150 lbs) to over 450 kg (1,000 lbs) for the largest units. Accessories & Options: Positioners: Fisher FIELDVUE™ DVC or other types can be mounted for modulating control. Limit Switches: Proximity or mechanical switches to indicate valve position. Solenoid Valves: Used for direct electrical control of the air supply, essential for ESD applications. Air Filter Regulators: To clean and regulate the air supply. Manual Override: Handwheel or lever for manual operation in case of air failure. Weather & Explosion Proofing: NEMA 4, NEMA 7 (explosion-proof) enclosures for accessories.

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