Valve Body Sizes and End Connection Styles

■8-, ■10-, ■12-, ■16-, and ■20-inch flanged valves with Class 300 and Class 600 raised-face flanges compatible with ASME B16.5. Consult your Fisher sales office for other end style connections.

Maximum Inlet Pressures and Temperatures(1)

Consistent with Class 300 or 600 pressure-temperature ratings per ASME B16.34

Maximum Allowable Shutoff Pressure Drop(1).

For Single-Seal and Dual-Seal Construction (Except where further limited by the pressure-temperature rating of the valve body):
■Class 300: 51 bar (740 psi) at 38°C (100°F)
■Class 600: 103 bar (1480 psi) at 38°C (100°F)

Flow Characteristic

■Modified linear with single high density attenuator, ■Modified equal percentage with single characterized attenuator (see figure 4), or ■Modified equal percentage without attenuator

Flow and Shutoff Direction

Unidirectional flow for Design V260 is forward flow. Seal is upstream.
■Single Seal Constructions: Should be used for unidirectional flow and unidirectional shutoff only.
■Double Seal Constructions: V260A and V260C may be used for unidirectional and bidirectional flow. V260B should be used for unidirectional flow only for effective anti-cavitation protection. Bidirectional shutoff requires the dual seal construction.

Flow Coefficients

See the section titled Coefficients in this bulletin, or Catalog 12

Shutoff Classification

Single-Seal Composition Constructions: 0.001% of maximum valve capacity (less than 10% of ANSI/FCI 70-2 Class IV and IEC 60534-4)
Dual-Seal Composition Constructions: 0.001% of maximum valve capacity (less than 10% of ANSI/FCI 70-2 Class IV and IEC 60534-4)

Seal Material and Temperature Capability(1)

■Delrin (Standard) -29 to 82°C (-20 to 180°F)
■PTFE/PEEK(2) (3) (Optional) -29 to 93°C (-20 to 200°F)

Maximum Ball Rotation

90 degrees

Actuator Mounting

Right-hand or left-hand mounted as viewed from the valve inlet for forward flow

Packing Arrangements

PTFE Packing: Standard construction
(see figure 5)
ENVIRO-SEAL ® Packing: This optional packing system provides improved sealing, guiding, and transmission of loading force to control liquid and gas emissions. Contact your Fisher sales office for availability of ENVIRO-SEAL packing (see figure 5)

Dimensions

See figure 6

Options

■Double block-and-bleed applications (Dual-seal construction is required), ■Two Stage V260A
Attenuator, ■Two or Three Stage V260B Attenuator, ■Class 150 or Class 900 flanges, ■Ring type joint flanges

• Superior Throttling Performance—The splined ball to shaft connection, splined shaft to actuator connection, double power-end bushing assemblies, and trunnion guiding, all provide improved dynamic control.
• Aerodynamic Performance—Up to -20 dBA acoustical attenuation can be achieved for the V260A within a single stage construction. Dual-stage construction can provide up to -25 dBA attenuation.
• Improved Service Life—The attenuator is an integral part of the seal assembly. The seal wipes to ball surface, not the attenuator, promoting increased service life.
• Trim Versatility—Key valve components, such as valve body, ball, shaft and bearings, are interchangeable between the Design V260A, V260B and V260C. This feature allows you to reduce your spare parts inventory and maintenance time.
• Sour Gas Service and Sour Crude Oil Capability—Optional materials are available that comply with NACE Standard MR0175.
• Tight Shutoff—Self-adjusting seal(s) that are pressure assisted provide tight shutoff for longer reliable service. The design incorporates a heavy duty S31600 stainless steel carrier that retains the composition seal for full-rated pressure drop service.
• Heavy Duty Trunnion—The ball trunnions are designed for demanding applications requiring longer service life, with a reduction in maintenance time and costs.
• Broad Hydrodynamic Applications—Single, dual, and three-stage attenuators for the V260B may be provided for a varying range of applications. A Kc value of 1.0 is achievable depending on service conditions.
• Flexible Applications—The attenuator is active throughout the ball rotation for very demanding services or a characterized attenuator is used to match the service conditions (see figure 4).

Note
Fisher does not assume responsibility for the selection, use, or maintenance of any product. Responsibility for proper selection, use, and maintenance of any Fisher product remains solely with the purchaser and end-user.