• Total Steam Control—Combines pressure and temperature control in a single valve.
• Full Pressure Drop Capability—Rugged cage-guided design enables handling of full pressure drop of main steam.
• Noise Attenuation—Whisper III and WhisperFlo trims help to attenuate the noise by 30 to 40 dBA, respectfully.
• High Temperature Capability with Standard Class V Shutoff—Use of the patented Fisher Bore Seal trim gives capability of Class V shutoff as a standard up to 593°C (1100°F). This unique balanced trim is field-proven. See figure 7.
• Forged Valve Body—FEA designed valve body can handle the most demanding applications without thermal stress problems.
• Flow Up Angle—Permits vertical stem orientation for ease of maintenance in most applications.
• Thermally Compensated Trim—The cage is case-hardened for maximum life and is allowed to grow during thermally induced excursions. The plug is continuously guided and employs cobalt-based overlays for guide bands and tight metal-to-metal shutoff against the seat.
• Easy Maintenance Seat Ring—No bolting or gaskets used in the flow stream. Welded design provides Class V shutoff and long life. Deep Alloy 6 overlay can be refinished multiple times to maintain tight shutoff.
• Spiral-Wound Gaskets for Excellent Bonnet Sealing Under All Service Conditions—Premium gaskets provided with N06600 windings and graphite filler material.
• Precise Spraywater Injection—CFD designed spray manifold determines water injection point and insertion depth to maximize mixing and quick vaporization.
• High Turndown—Standard trim control rangeability is 50:1. Special construction can provide up to 75:1 turndown.
• Quick Stroking Actuation—High performance pneumatic piston actuators with FIELDVUETM digital valve controllers can achieve full stroke in less than 2 seconds while still maintaining highly accurate step response. Optimized digital valve controllers are available when high stroke speeds are required. Contact your Emerson Process Management sales office for assistance.
• Performance Diagnostics—With the self-diagnostic capability, questions can be answered about a valve's performance, without pulling the valve from the line. The present valve/actuator signature (seat load, friction, etc.) can be compared against previously stored signatures to discover performance changes before they cause process control problems.

• Blowdown Trim—Protects the working trim and machined surfaces of the valve body during steam blow.
• Hydro-Plug— Provides a convenient way to establish hydrotest boundaries associated with using a split pressure class valve.
• Split Functionality—When piping dictates, the TBX valve can be provided as separate components allowing the pressure control in the valve body and separate temperature reduction downstream in a steam cooler.
• Commissioning Service—Proper installation of blowdown trim and hydro-plug fixtures, along with reassembly and calibration of turbine bypass valves, is critical for the valves to be ready for service when needed. Let skilled Emerson Process Management technicians take care of this vital commissioning service to protect this very important plant asset.
• Diagnostic Services—The Emerson Process Management Diagnostic Services Group delivers world class services and innovative technologies for top performance of critical service valves and other production assets.

End Connection Sizes(1)

■NPS #x8(2), ■NPS #x12, ■NPS #x16,
■NPS #x18, ■NPS #x20, ■NPS #x24,
■NPS #x30, and ■NPS #x36

End Connection Types

■Buttweld (all sizes)
■Raised Face Flanges (all sizes)

Configuration

Angle Pattern (Flow Up)

Valve Body Ratings(3)

See table 8

Maximum Pressure Drop(1)

Valve with Whisper Trim III Cage: ■ 0.60 ∆P/P1 maximum for level A1
■ 0.75 ∆P/P1 maximum for levels B1 and B3
■ 0.85 ∆P/P1 maximum for level C3
■ 0.99 ∆P/P1 maximum for level D3
Valve with WhisperFlo Trim: ■Levels X, Y, and Z: 0.94 ∆P/P1 maximum. If greater than 0.94 ∆P/P1, consult your Emerson Process Management sales office

Flow Characteristics(4)

Whisper Trim III Cages: Linear
WhisperFlo: Linear

Flow Direction

Whisper Trim III Cage: Flow up
WhisperFlo: Flow up

Port Diameter and Maximum Travel

See table 8 for Whisper Trim III cages
See table 9 for WhisperFlo

Bonnet Type

Bolted

Shutoff Classifications per ANSI/FCI 70-2 and IEC 60534-4

■Class V (standard) (Whisper Trim III)
■Class V (standard) (WhisperFlo)

Body/Bonnet

■SA105 (Carbon Steel)
■SA182 Grade F22 (2.25Cr-1Mo)
■SA182 Grade F91 (9Cr-1Mo-V)

Bonnet Bolting

■SA105 Valve Body — SA193 Grade B7 up to 427°C (800°F)
■SA182 Grade F22 Valve Body
— SA193 Grade B16 up to 524°C (975°F), N07718 above 524°C (975°F)
■SA182 Grade F91 Valve Body
— N07718 up to 593°C (1100°F)

Control Plug

F22 with Alloy 6 guiding and seating surfaces(1, 2)

Stem

■SA479 Type S20910: up to 427°C (800°F)
■A565 Grade 616: over 427°C (800°F)

Cage

■SA182 Grade F22 Nitrided(1) ■S41000 cage, F22 Nitrided retainer(2)

Seat

■SA105 Valve Body -- Carbon Steel with Alloy 6 Seating Surface
■SA182 Grade F22 Valve Body -- F22 with Alloy 6 Seating Surface
■SA182 Grade F91 Valve Body -- F91 with Alloy 6 Seating Surface

Piston Rings

Alloy 6 with N07750 Expander

Bore Seal

N07718

Gaskets

N07750/Graphite

Packing

Graphite/Flexible Graphite

Nozzles

S41000 SST

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