Note
Neither Emerson ® , Emerson Process Management TM , 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.

• Safer Bonnet / Valve Body Connection— Unique design provides additional protection if disassembly of bonnet/valve body connection is inadvertently started while there is still pressure in the valve body. Pins mounted in the valve bonnet help ensure the bonnet disengages from the valve body as the hammer nut is removed, while the threads are still engaged.
• Heavy-Duty Guiding—Massive guiding (figures 2 and 3) positively aligns the valve plug in the seat ring for reliable service. The screwed-in seat ring completely encloses the seat ring gasket.
• Live-loaded Packing System—The packing system provides an improved stem seal to help prevent the loss of valuable or hazardous process fluids or gases. It features Fisher® ENVIRO-SEAL® packing technology to provide reduced packing maintenance.
• NACE Constructions—NACE compatible trim is available with the Design D4 control valve. These constructions meet the metallurgical requirements of NACE MR0175 / ISO 15156.
• Low Temperature Materials—Valve construction materials allow use in applications as low as -46°C (-50°F).
• Quick-Change Valve Plug—Removable groove pin allows quick, easy valve plug replacement.
• Severe Service Capability with Tungsten Carbide Trim—D4 valves are available with tungsten carbide trim for erosive service. This trim is designed specifically for severe service applications in the oil and gas industry. Durable tungsten carbide trim may benefit your application by wearing better and lasting longer.
• Easy Installation—Compact design allows installation where space is a premium. Screwed valve bodies feature compact face-to-face dimensions while flanged valve bodies conform to ISA-75 standards for maximum versatility.
• Easy Maintenance—Hammer nut bonnet/body joint allows repair or maintenance with a minimum of tools, without removing the valve body from the piping system. Seat ring can be removed with the same service tools used with a Fisher Design D valve.
• Integral Bonnet Flange— Bonnet has an integral flange that accepts hammer nut force when making the bonnet-to-body connection. There are no snap rings subject to possible failure in sour service or in atmospheric corrosion.
• Standard Trim for Throttling or On-Off Service— Micro-Form trim is standard for throttling or on-off service at no extra cost.
• Application Flexibility—Choices of port diameters up to 31.8 mm (1.25 inches), end connections, and trim materials suit these valves to many applications, including sour service.

Application Information

1. Type of application

Control Valve Assembly Information

Refer to the Specifications and review the information under each specification.

Available Configurations

Spring-To-Close
Spring-To-Open

Valve Sizes and End Connection Styles(1)

See table 1

Dimensions

See tables 9 and 10 and figures 4 and 5.
Face-to-face dimensions for flanged valves conform to ISA-75.03 (Class 150-600) and ANSI/ISA-75.16 Short (Class 900/1500)

Maximum Inlet Pressures and Temperatures(1)

Flanged connections are consistent with the ASME B16.34 pressure-temperature class, subject to Material Temperature Capabilities for the Valve Body Assembly (see following specification). For NPT end connections, the valve body rating is 4250 psig.

Maximum Pressure Drops(1)

See tables 5, 6, 7, and 8

Input Signal to Actuator

See tables 5, 6, 7, and 8

Actuator Maximum Casing Pressure

3.4 bar (50 psig)

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

Class IV

Flow Characteristic

Equal percentage

Flow Direction

Flow up only

Flow Coefficients

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

Port Diameters

See table 1

Construction Materials

Valve Body and Bonnet: ASME SA 352 LCC
Valve Plug and Seat: See table 3.
Valve Stem: S20910
Actuator O-Rings: (HNBR) Hydrogenated Nitrile
Bonnet O-Ring:
Standard: HNBR
Optional: Fluoroelastomer
Packing: PTFE/Carbon PTFE
Packing Springs: N07718
Packing Retainer: S17400
Actuator Diaphragm: Chloroprene
Actuator Spring: Painted steel
Seat Ring Gasket: S31600 (316 SST)
Spring Cover (Fail Up): PVC

Valve Plug Travel

19 mm (0.75 inch)

Valve Plug Style

Micro-Form valve plug

Actuator Diaphragm Effective Area

452 cm2 (69 inches2)

Actuator Pressure Connection Size

1/4 inch NPT female

Material Temperature Capabilities

Actuator Assembly:
Fail Down, Spring-to-Close: -40 to 93°C (-40 to 200°F)
Fail Up, Spring-to-Open: -40 to 77°C (-40 to 170°F)
Valve Body Assembly:
Standard Bonnet O-Ring: -46 to 149°C (-50 to 300°F)
Optional Bonnet Fluoroelastomer O-Ring: -23 to 204°C (-10 to 400°F)

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.