1. General Introduction
Fisher 8560 is a high-performance butterfly valves feature a stainless steel disk with a stainless steel seal ring, its pressure-assisted metal seal ring provides excellent shutoff against pressure applied in the recommended flow direction for both liquid and gas applications. The NOVEX and Phoenix III metal seals are available for demanding applications requiring excellent shutoff capabilities. The splined-shaft valve combines with a variety of power actuators to form a reliable, high-performance control valve suitable for throttling applications requiring extremely low leakage rates. An optional double D shaft combines with a variety of power and manual actuators for use in quarter-turn or on/off applications. It mainly come with typical features as below:
Excellent Flow Control: The eccentrically- mounted disk design provides an approximate linear flow characteristic and can be used for throttling or on/off control applications through 90 degrees of disk rotation.
Sour Service Capability: Trim and bolting materials are available for applications involving sour service. These constructions comply with the recommendations of NACE MR0175-2002.
Improved Environmental Capabilities: The optional ENVIRO-SEAL packing system is designed with improved sealing, guiding, and loading force transmission. It can control emissions to below the EPA (Environmental Protection Agency) limit of 100 ppm (parts per million) for valves.
Integral Shaft-to-Body Bonding: Standard valve construction includes conductive packing to provide electrical bonding for hazardous area applications.
2. Specification of Fisher 8560 Butterfly valve
Valve Size | NPS 3, NPS 4, NPS 6, NPS 8, NPS 10, NPS 12, available in lugged style |
Process Connection Type | Flanged, Single Flanged, Lugged |
Seal Type | Metal, Soft |
Shutoff Classifications | NOVEX Seal: For NPS 3 through 12. Unidirectional shutoff is Class IV Phoenix III Seal: For NPS 3 through 12. Bidirectional shutoff to Class VI |
Flow Characteristic | Approximately linear |
Flow Coefficient Ratio | 100 to 1 |
Disk Rotation | Clockwise to close (when viewing from the drive shaft end) through 90 degrees of disk rotation |
Actuator Action | With a diaphragm or piston rotary actuator, the valve action is field-reversible |
3. Construction Material Temperature Limits table of Fisher 8560 Butterfly valve
Components and materials of construction | Temperature Limits | |
Specifications | Celsius degree(℃) | Fahrenheit degree(℉) |
Valve Body Material | ||
Carbon Steel | -29 to 427 | -20 to 800 |
CF8M | -198 to 538 | -325 to 1000 |
Disk Material | ||
CF8M | -198 to 538 | -325 to 1000 |
Shaft Material | ||
S20910 | -198 to 538 | -325 to 1000 |
S17400 | -62 to 427 | -80 to 800 |
Bearing Material | ||
PEEK / PTFE lined | -73 to 260 | -100 to 500 |
Metal | -198 to 538 | -325 to 1000 |
Seal Ring | ||
NOVEX Metal Seal Ring | -46 to 538 | -50 to 1000 |
Phoenix III Metal Seal Ring & Fluorocarbon backup ring | 40 to 232 | -40 to 450 |
Phoenix III Fire-Tested Metal Seal Ring & Fluorocarbon backup ring | -40 to 232 | -40 to 450 |
4. Assembly drawings for Fisher 8560 Butterfly valve
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