Industrial Controller
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Infinite Innovation, the Future of Industrial Control Systems
Infinite Innovation, the Future of Industrial Control Systems
PRODUCT POSITION:HOMEPRODUCT—FISHER™ 646
FISHER™ 646
Specifications: Valve Size: 3" to 12" (DN 80 to DN 300) Pressure Class: ANSI 150 End Connections: Wafer, Lugged Temperature Range: -20° to 400°F (-29° to 204°C) [Dependent on seat material] Performance & Flow Characteristics: Shut-Off Class: ANSI Class VI (Bubble-tight) Flow Coefficient (Cv): High Cv values. Specific values depend on valve size. Pressure Rating: 150 psi (10.3 bar) saturated steam; 275 psi (19.0 bar) for water, oil, and gas. Materials of Construction: Body: Ductile Iron (epoxy coated standard), Carbon Steel, Stainless Steel Disc: 316 Stainless Steel (standard) Stem: 17-4PH Stainless Steel (standard) Seat: Resilient materials such as Buna-N (Standard), EPDM, or Viton® for different fluid compatibilities and temperature ranges. Actuator & Accessories: Actuator Types: Pneumatic: Fisher 1051/1052 SRD spring-return and double-acting piston actuators, 657/667 spring-diaphragm actuators. Electric: Electric motor actuators. Positioner: A Fisher FIELDVUE™ DVC or other rotary positioner can be mounted for precise modulating control. Accessories: Limit switches, solenoid valves, filter regulators, etc.
DESCRIBE
The Fisher™ 646 is a high-performance, resilient-seated butterfly valve designed for on-off and modulating control services in a wide range of industrial applications, including water, air, steam, and other general utility services. It bridges the gap between standard butterfly valves and more expensive high-performance designs, offering an excellent balance of performance, reliability, and value.
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