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Model 390/391 Control Valve

Brand: Dyna-Flo Control Valve Services
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The Dyna-Flo 390/391 control valve is a heavy-duty globe style control valve.

This valve is used in all kinds of demanding applications, including oil and gas production and chemical process industries. Metal seats are used for increased seat life.

Model 390/391 valves are balanced cage guided, single port valves that can be used in either snap on/off acting or throttling applications of either liquids or gases.

A bolted bonnet is standard and a typical actuator is a Dyna-Flo Model DFC or DFO linear actuator.
Features
  • High quality construction
  • Versatility
  • Field service friendly
  • Industrial highly quality external coatings
  • Pressure drop capabilities
  • Sour gas service capability
  • Shut off Classification
  • Balanced design
  • Environmentally friendly

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Specifications

Brand

Enclosure, Body Material

  • 316 Stainless Steel - ASTM A351 CF8M, 1.4408
  • Carbon Steel (LCC or WCC)
  • Cast Steel (WC9)

Flange Size - 2” (DN 50)

  • 2” (DN 50) - 1500#
  • 2” (DN 50) - 900#

Flange Size - 3” (DN 80)

  • 3” (DN 80) - 1500#
  • 3” (DN 80) - 900#

Flange Size - 4” (DN 100)

  • 4” (DN 100) - 1500#
  • 4” (DN 100) - 900#

Flange Size - 6” (DN 150)

  • 6” (DN 150) - 1500#
  • 6” (DN 150) - 900#

Gasket Material

  • Sprial Wound Gasket: Alloy 600 (N06600)

Materials of Construction

  • Anti-Extrusion Ring: PolyEtherEtherKetone (PEEK)
  • Back-Up Ring, Paking Follower, Lantern Ring, Packing Box Ring: 316L Stainless Steel Dual Grade
  • Back-Up Ring, Retaining Ring, Packing Follower, Lantern Ring, Packing Box Ring: 316 Stainless Steel
  • Packing Stud: Stainless Steel (B8M)
  • Piston Ring: Graphite

NACE & NIST

  • NACE

Nut & Bolt Material

  • Packing Nut: Stainless Steel (8M)

Operating Temperature

  • -198° to 427° C (-352° to 800° F)

Packing Material

  • Graphite (Ribbon/Filament)
  • PTFE V-Ring

Seat / Seal Material

  • Seal Ring: Carbon-Filled PTFE/Elgiloy

Spring Material

  • 304 Stainless Steel

Stem Material

  • Valve Stem: Stainless Steel (S20910)

Welded Connection

  • 2” Butt Weld End
  • 3” Butt Weld End
  • 4” Butt Weld End
  • 6” Butt Weld End

Documentation

Data Sheets

Product Manuals

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