Key Parameters & Specifications Parameter / Feature Category Description Product Name Fisher™ 585C Series Pneumatic Actuator Type Spring-and-Diaphragm, Linear (Sliding-Stem) Actuator Primary Function To provide linear thrust for operating sliding-stem control valves (e.g., globe valves). Actuator Type Spring-Return (Fail-Safe). Input Signal Standard: 3-15 psig (0.2-1.0 bar) or 6-30 psig (0.4-2.0 bar). Supply Pressure Typically up to 100 psig (7 bar) for the spring-return model. Action Field-reversible between direct-acting and reverse-acting. Fail-Safe Action Spring-Return. The valve fails to the position determined by the action (e.g., direct-acting fails open, reverse-acting fails closed). Diaphragm Material Nitrile (standard). Other materials like EPDM, Viton® are available for different temperature and fluid compatibility. Spring Ranges Multiple spring ranges are available to match the required thrust for different valve sizes and pressure drops. Stem Travel Available in various standard strokes (e.g., 3/4", 1-1/2", 2-1/2", 3-1/2"). Enclosure NEMA 4X (IP66) molded cover is standard, providing weatherproof and corrosion-resistant protection. Mounting Directly mounts to the yoke of Fisher and other compatible sliding-stem control valves. Accessory Mounting The yoke and cover are designed to mount accessories like: • Positioners (e.g., Fisher 480, FIELDVUE DVC) • Limit Switches • Transducers (I/P) • Solenoid Valves