WebFeatures. Fisher 657 and 667 actuators are designed to provide dependable on/off or throttling operation of control valves. These spring-opposed diaphragm actuators position the valve plug in the valve in response to varying controller or valve positioner pneumatic output signals. The 657 actuator is direct-acting, while the 667 is reverse-acting. WebJun 26, 2011 · Type 667 Size 30-76 & 87 Table 1. Specifications ACTUATOR SIZE SPECIFICATION(1) Nominal Effective Area Yoke Boss Diameter Acceptable Valve Stem Diameter Maximum Allowable Output …
Fisher 657 and 667 Diaphragm Actuators - control …
WebThis instruction manual provides information on installation, adjustment, maintenance, and parts ordering for the Fisher 667 actuator in sizes 80 and 100 (figure 1). Refer to separate instruction manuals for information about other equipment and accessories used with these actuators. www.Fisher.com . . . . . . . . . . . . . . . . . WebFeb 2, 2024 · The 667 actuator provides 76 mm (3 inches) maximum actuator travel. The 667-4 actuator provides 102 mm (4 inches) maximum actuator travel. Both actuators position the valve plug in response to varying pneumatic loading pressure on the diaphragm. Figure 2 shows the operation of these actuators. how is leptospirosis treated in animals
Fisher™ 657 and 667 Diaphragm Actuators Emerson US
WebAdditional Specifications for Fisher 657 and 667 Series Actuators ACTUATOR SIZE EFFECTIVE DIAPHRAGM AREA cm2 YOKE BOSS DIAMETER MAXIMUM TRAVEL 1. These values are based on material … WebThe 667 can be externally tubed for instruments or accessories when required. -Spring rates, travel stops, and manual operators are available for nearly any control valve application. -A molded diaphragm travels in a deep diaphragm casing, minimizing area change throughout the travel. WebThe 667 can be externally tubed for instruments or accessories when required. Spring rates, travel stops, and manual operators are available for nearly any control valve application. A molded diaphragm travels in a deep diaphragm casing, minimizing area … how isle royale became a national park