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The Dyna-Flo 380 Series Valves are a heavy-duty cage guided globe style control valves designed for high pressure applications.

These valves are used in all kinds of demanding applications, including oil and gas production and chemical process.

Both Model 380/381 are cage guided control valves with balanced plugs.

Model 380 control valves are capable of class V shutoff at process temperature below 450° F (232° C).

Model 381 control valves are designed for high temperature / high pressure applications and are well suited for general applications that do not require tight shutoff.

380 Series control valves 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
  • Emissions reducing packing

Specifications

Enclosure, Body Material

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

Flange Size - 3” (DN 80)

  • 3” (DN 80) - 2500#

Flange Size - 4” (DN 100)

  • 4” (DN 100) - 2500#

Gasket Material

  • Seat Ring Gasket / Cage Gasket: Alloy 400 (N04400)

Materials of Construction

  • Anti-Extrusion Ring: PolyEtherEtherKetone (PEEK)
  • Back-Up Ring, Retaining Ring: 316 Stainless Steel
  • Back-Up Ring: 316L Stainless Steel
  • Piston Ring: Graphite

NACE & NIST

  • NACE

O-Ring Material

  • EPDM
  • Nitrile
  • Viton

Operating Temperature

  • -73° to 538° C (-100° to 1,000° F)

Packing Material

  • Graphite
  • PTFE

Seat / Seal Material

  • Seal Ring: PTFE/Elgiloy
  • Seat: Metal

Stem Material

  • Valve Stem: Stainless Steel (S20910)

Welded Connection

  • 3” Butt Weld End
  • 4” Butt Weld End

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