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.

• Fully protective trim—The valve body, shaft, and bearings are fully protected by hard wear-resistant trim materials.
• Pipeline and flange protection—The throttled flow stream is guided through a specially shaped flow ring to minimize turbulence and impingement on the pipe wall. The valve can be matched to the bore size of the inlet and outlet piping in order to prevent turbulence being generated by the step resulting in scouring erosion of the flange faces, unexpected leakage, and expensive rework. In addition, both the inlet and outlet valve flange faces are protected by a portion of the hard trim.
• Long Service Life—The Vee-Ball design, when used in reverse flow mode, keeps the high velocity down stream of the vena contracta within the flow ring bore at the outlet of the valve. Compared with other styles of valves, the exit flow is essentially parallel with the flow ring wall and a minimum of flow impingement occurs. Combined with a choice of hard wear-resistant materials, a significantly long life is obtained.

Easily replaceable trim parts allow the valve to be overhauled at predetermined intervals and the valve body used again during repeated operational cycles.

• Ease of installation—Full flanging on the valve body allows the valve body to be easily aligned centrally with the pipe flanges, an essential requirement in avoiding erosion across the flange faces.
• Excellent Flow Control—Precise contouring of the V-notch ball provides a modified equal percentage flow characteristic. When combined with a valve actuator/controller system having minimal lost motion, improved process control can be obtained.
• Quick and Easy Maintenance—All trim parts are retained without the use of press fits or screw threads exposed to the process fluid. See figure 2.
• Structural Integrity—The valve body, complete with flanges, is made from a one-piece casting. No welding is employed. No O-ring seals are used. Use of a flanged valve body does not require the use of extra long studs.

The shaft seal is made from well-proven PTFE chevron ring packing with the means for external adjustment.

• A PSZ (partially stabilized zirconia) ceramic flow ring insert is available with HCI (high chrome iron) or PSZ ceramic ball for particularly aggressive slurry services with extended lifetime requirements. The ceramic insert offers substantial increase in flow ring lifetimes.
• Trim materials are available to meet the requirements of corrosive/erosive slurries. See table 2.
• The "Flow Over the Top" V-Notch Ball offers an alternative to the standard V-Notch Ball in scaling applications.
• The drive shaft is available with either a double D or splined actuator connection to accommodate a choice of actuation between a spring-opposed diaphragm or a rack and pinion.

Valve Sizes

■NPS 3, ■4, ■6, ■8, ■10, and ■12

End Connection

V150S: CL150 Raised-face flange

Face to Face Dimension

See figure 3

Maximum Inlet Pressure

Consistent with pressure-temperature ratings per ASME B16.34 but do not exceed the material temperature capabilities shown below or the pressure drop limitations

Maximum Shut Off Pressure

See tables 3 and 4

Shutoff Classification

Class I per ANSI/FCI 70-2 and IEC 60534-4
(Class II and better not available). A defined initial maximum leak rate can be provided subject to review of service conditions.

Construction Materials

Standard Construction: See table 1

Temperature Capability

For Trim 1: 427°C (801°F) maximum
For Trims 2 and 3: 230°C (446°F) maximum
For materials: See table 1

Flow Characteristic

Approximately equal percentage

Dimensions

See figures 3 and 4

Flow Direction

Reverse flow recommended (into concave face of ball, out through the flow ring)

Flow Coefficients

See section labled Coefficients in this bulletin

Maximum Ball Rotation

90 degrees

Valve Installation

Shaft axis to be horizontal

Actuator Mounting

Right-hand or left-hand, as viewed from upstream end of valve

Valve/Actuator Action

With diaphragm or piston rotary actuator and splined shaft, the valve is field-reversible between PDTC or PDTO: ■push-down-to-close (extending actuator rod closes valve) and ■push-down-to-open (extending actuator rod opens valve)

Actuator Size Selection

Contact your Emerson Process ManagementTM sales office for information

Approximate Weight

NPS 3: 15 kg (33 lb)
NPS 4: 28 kg (62 lb)
NPS 6: 45 kg (99 lb)
NPS 8: 82 kg (180 lb)
NPS 10: 120 kg (265 lb)
NPS 12: 178 kg (390 lb)

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.