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Model DA5

Back Pressure Regulator

SKU#:

Model DA5

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Overview

The Model DA5 is a high performance, spring operated, back pressure regulator with top-guided piston-cylinder that provides high flow capacity and high pressure drop capability. Internal trim design allows the same basic unit to cover a broad range of pressure settings. Performance approaches that of competitive pilot-operated designs in the basic design. Applied primarily in clean gaseous service, but also can be applied as a liquid or steam valve.

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Description

The Model DA5 is a high performance, spring operated, back pressure regulator with top-guided piston-cylinder that provides high flow capacity and high pressure drop capability. Internal trim design allows the same basic unit to cover a broad range of pressure settings. Performance approaches that of competitive pilot-operated designs in the basic design. Applied primarily in clean gaseous service, but also can be applied as a liquid or steam valve.

Inlet Design Pressure

  • Up to 675 psig (46.5 Barg)

Outlet Pressure

  • 1 psig (0.07 Barg) to 450 psig (31.03 Barg)

Line Sizes

  • 1/2" (DN15)
  • 3/4" (DN20)
  • 1" (DN25)
  • 1-1/4" (DN32)
  • 1-1/2" (DN40)
  • 2" (DN50)
  • 2-1/2" (DN65)
  • 3" (DN80)
  • 4" (DN100)
 

End Connections

  • NPT
  • FLANGED
  • BSPT
  • EXTENDED PIPE NIPPLES
  • 14" FACE TO FACE
  • EXTENSION TUBE ENDS

Material Combinations: Body / Diaphragm Case / Spring Chamber

  • DI/DI
  • CS/DI
  • CS/CS
  • BRZ/BRZ *
  • BRZ/DI 
  • BRZ/CS
  • HC/CS *
  • BRZ/SST
  • HC/SST *
  • SST/DI
  • DUP SST/CS
  • SST/CS
  • DUP SST/SST
  • SST/SST
  • DUP SST/DUP SST

* Through 2" body size only.

DI = Ductile Iron
CS = Carbon Steel
SST = Stainless Steel
HC = Hastelloy C
BRZ = Bronze
Dup SST = Super Duplex SST

Features

  • Versatile: Five basic materials and multiple trim material combinations to select from.
  • Tight Shutoff: Multiple composition materials provide Classes II, IV or VI inboard leakage rates. Designed as a soft-seated valve.
  • Capacity: Highest in the industry. Allows smaller body sizes than competitors in a majority of applications.
  • Pressure Drop: Highest in the industry when coupled with high flow capacity.
  • Trim Design: "DO-ALL" trim design provides FTO flow direction. Results in high sensitivity and stability. Internals are cage-contained within easily removable quick change trim.
  • Rangeability: Basic valve gives outstanding rangeability due to close tolerances, balanced
    trim, and a broad range of elastomeric diaphragms and soft seats. Can be as high as 500:1.
  • Heavy-Duty Guiding: Heavy top guided to maintain stability and increased diaphragm life.
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