• Fluid Compatibility—The PFA (perfluoroalkoxy resin)-lined assembly provides corrosion protection by shielding metal parts from the process media, making it ideal for controlling severely corrosive media.
• Permeating Service—A heavy duty PTFE bellows with stainless steel support rings is standard for all services in the 1- to 4-inch valve sizes. Compared to a standard bellows, the heavy duty bellows design has an enhanced resistance to permeation. This is due to a wall thickness of 2.5 mm (0.1 inch) and pressure retaining rings inside the bellows. This bellows features a modified PTFE material (TFM 1705) which provides additional permeation protection over the original heavy duty PTFE bellows.
• Economy—Because all metal parts are shielded from the process fluid, the use of expensive alloys is not necessary.
• Liner Integrity—Lining thickness is a minimum of 5 millimeters at all areas where the valve is exposed to process flow (3.5 millimeters minimum thickness for 0.5 inch and 0.75 inch valves). Transfer molding techniques provide for excellent consistency, density, and low permeability. Transfer molded PFA material is translucent. This allows for checking of the entire wall surface for pin holes and cracks in the material during the manufacturing process.

Greater safety under vacuum and high temperature service is achieved by dovetail anchorings which provide a mechanical bond, minimizing the possibility of detachment of the lining from the cast valve body.

• Easy In-Line Maintenance—The top entry design eases in-line maintenance. This design also minimizes the transfer of pipeline stress, which minimizes leakage both at the valve body joint and seat ring.
• Long Life Bellows Seal—The PTFE bellows seal is leak tight and, with proper use and maintenance, can have an expected life cycle exceeding 500,000 full stroke cycles.

Note
Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection, use and maintenance of any product. Responsibility for the selection, use, and maintenance of any product remains with the purchaser and end-user.

Valve Sizes

■0.5, ■0.75, ■1, ■1.5, ■2, ■3, ■and 4-inches

Face-To-Face and Flange Compatibility

Maximum Inlet Pressures and Temperatures(1)

See table 2

Downstream/Outlet Pressure Ratings(1)

See figure 3 for positive pressure service ratings
See figure 4 for vacuum service ratings

Application Limits

Liquid Service: For cavitating applications, contact your Emerson Process ManagementTM sales office
Gas Service: Velocity ≤ 0.33 MACH

Shutoff Classification

Class VI per ANSI/FCI 70-2 and IEC 60534-4

Bellows Seal

For 0.5 and 0.75 Inch Size: Standard PTFE
For 1- through 4-Inch Size: Heavy-duty PTFE with SST support rings

Construction Materials

See table 3

Expected Life Cycle

Full Stroke: 500,000

Temperature Capabilities

Positive Pressure Service: -29 to 180°C
(-20 to 360°F) (see figure 3).
Vacuum Service: -29 to 180°C (-20 to 360°F)
(see figure 4)

Standard Flow Characteristic/Valve Plug Style

Equal percentage

Flow Direction

Up through the seat ring (see figure 2)

Flow Coefficients

See table 1, the section titled Coefficients in this bulletin, or Catalog 12 for coefficients of Fisher valves

Port Diameters and Maximum Valve Plug Travel

See table 1

Bonnet Style

Plain

Packing Arrangement

Braided PTFE rings

Yoke Boss and Stem Diameter

See table 1

Approximate Weight

See figure 5

Options

■Line-Flange gasket, (stainless steel insert, compression gasket, and PTFE overlay) with thickness of 5.1 mm (0.20 inch) for 0.5 through 2-inch sizes, and 7.1 mm (0.28 inch) for 3- and 4-inch size valves
■Tool for removing and installing the seat ring