1. General Introduction
Fisher 8580 is a high-performance butterfly valve offers excellent throttling and automated on-off, quarter-turn performance. An approximately linear flow characteristic provides precise throttling control, offers high cycle life and rugged reliability. The valve body meets PN 10 through PN 40, CL150,and CL300 ratings. Face-to-face dimensions meet EN558, API 609, and MSS-SP68 standards. Line centering clips provide for versatility to mount and align the same wafer style valve body in different piping configurations (ASME and EN ratings). The 8580 rotary valve features an eccentrically mounted disk with either soft or metal seal, providing capability for enhanced shutoff. The interchangeable sealing technology allows for the same valve body to accept both soft and metal seals. It mainly come with typical features as below:
Approximately linear flow characteristic: An approximately linear flow characteristic provides precise throttling control.
PEEK/PTFE bearing as standard: The PTFE-lined PEEK bearing is a low friction, low wear bearing. It allows the valve to operate under high pressure drops for a high cycle life while maintaining low torque. The “drop-in” bearing design enables fast, easy maintenance.
Spline-ended Shaft: The splined shaft with clamped lever and single-pivot linkage reduces lost motion between the actuator and the valve shaft.
Excellent Shutoff: Both the metal and soft seal rings have pressure-assisting sealing action that ensures tight shutoff regardless of pressure drop.
Sour Service Capability: Trim and bolting materials are available for applications involving sour liquids and gases. These constructions comply with NACE MR0175-2002, MR0103, and MR0175 / ISO 15156.
Travel Indication: Additional travel indication can be achieved by using the indication line on the shaft, along with the disk position markings on the packing follower.
2. Specification of Fisher 8580 Butterfly valve
Specifications | EN Standard | ASME Standard |
Valve Body Size | DN 50, 80, 100, 150, 200, 250, and 300 | NPS 2, 3, 4, 6, 8, 10, and 12 |
Pressure Rating | PN 10 to 40 per EN 1092-1 | CL150 / 300, CL150-600 for NPS 2 per ASME B16.34 |
Valve Body Materials | 1.0619 steel | ASME SA216 WCC steel |
1.4409 stainless steel | ASME SA351 CF3M stainless steel | |
ASME SA352 LCC | ASME SA352 LCC | |
CW2M | CW2M | |
M35-2 | M35-2 | |
Disk with PTFE or RPTFE Seal | 1.0619 steel | ASME SA351 CF3M stainless steel |
CW2M | CW2M | |
M35-2 | M35-2 | |
Disk with Metal or UHMWPE Seal | Chrome-plated EN 1.4409 Stainless Steel | Chrome-plated CF3M Stainless Steel |
Chrome-plated EN 1.4409 Stainless Steel | Chrome-plated CF3M Stainless Steel | |
End Connections | Mates with raised-face flanges per EN 1092-1 | Mates with raised-face flanges per ASME B16.5 |
Valve Body Style | Lugged with tapped or through holes, Double-Flange with through holes, and Wafer | |
Shutoff | PTFE, RPTFE, or UHMWPE seal ring - Class VI per ANSI/FCI 70-2 and IEC 60534-4 | |
S31600 (316 SST) seal ring - Class IV per ANSI/FCI 70-2 and IEC 60534-4 | ||
Flow Direction | Standard (forward flow) is with the seal retainer facing upstream; reverse flow is permissible for soft seals only | |
Flow Characteristic | Approximately linear | |
Disk Rotation | Counterclockwise to open (when viewed from actuator side of valve body) through 90 degrees of disk rotation | |
3. Construction Material Temperature Limits table of Fisher 8580 Butterfly valve
Components and materials of construction | Temperature Limits | |||||
EN flanges | ||||||
Valve Body | Shaft | Bearing Lining and Jacket | Seal | Packing | Celsius degree(℃) | Fahrenheit degree(℉) |
1.0619 Steel | S17400 or S20910 | PEEK / PTFE | PTFE or RPTFE | PTFE or Graphite | –10 to 232 | 14 to 450 |
UHMWPE | PTFE or Graphite | –10 to 93 | 14 to 200 | |||
Metal or Flow Ring | PTFE | –10 to 232 | 14 to 450 | |||
Graphite | -10 to 260 | 14 to 500 | ||||
R30006 (Alloy 6) or S31600 Nitride | Metal or Flow Ring | Graphite | –10 to 400 | 14 to 752 | ||
LCC | S17400 or S20910 | PEEK / PTFE | PTFEE | PTFE | –46 to 232 | –50 to 450 |
1.4409 Stainless Steel | S20910 | PEEK / PTFE | PTFE or RPTFE | PTFE or Graphite | –10 to 232 | 14 to 450 |
UHMWPE | PTFE or Graphite | –10 to 93 | 14 to 200 | |||
Metal or Flow Ring | PTFE | –10 to 232 | 14 to 450 | |||
Graphite | -10 to 260 | 14 to 500 | ||||
R30006 (Alloy 6) or S31600 Nitride | Metal or Flow Ring | Graphite | –10 to 500 | 14 to 932 | ||
CW2M | N10276 | PEEK / PTFE | PTFE or RPTFE | PTFE | –10 to 232 | 14 to 450 |
M35-2 | N05500 | PEEK / PTFE | PTFE or RPTFE | PTFE | –10 to 232 | 14 to 450 |
ASME flanges | ||||||
Valve Body | Shaft | Bearing Lining and Jacket | Seal | Packing | Celsius degree(℃) | Fahrenheit degree(℉) |
WCC steel | S17400 or S20910 | PEEK / PTFE | PTFE or RPTFE | PTFE or Graphite | –10 to 232 | 14 to 450 |
UHMWPE | PTFE or Graphite | –10 to 93 | 14 to 200 | |||
Metal or Flow Ring | PTFE | –10 to 232 | 14 to 450 | |||
Graphite | -10 to 260 | 14 to 500 | ||||
R30006 (Alloy 6) or S31600 Nitride | Metal or Flow Ring | Graphite | –10 to 427 | 14 to 800 | ||
LCC | S17400 or S20910 | PEEK / PTFE | PTFEE | PTFE | –46 to 232 | –50 to 450 |
CF3M Stainless Steel | S20910 | PEEK / PTFE | PTFE or RPTFE | PTFE or Graphite | –10 to 232 | 14 to 450 |
UHMWPE | PTFE or Graphite | –10 to 93 | 14 to 200 | |||
Metal or Flow Ring | PTFE | –10 to 232 | 14 to 450 | |||
Graphite | -10 to 260 | 14 to 500 | ||||
R30006 (Alloy 6) or S31600 Nitride | Metal or Flow Ring | Graphite | –10 to 454 | 14 to 850 | ||
CW2M | N10276 | PEEK / PTFE | PTFE or RPTFE | PTFE | –10 to 232 | 14 to 450 |
M35-2 | N05500 | PEEK / PTFE | PTFE or RPTFE | PTFE | –10 to 232 | 14 to 450 |
4. Assembly drawings for Fisher 8580 Butterfly valve
