Model DA1

Description

The Model DA1 is a high performance, spring operated, flow-to-open, pressure reducing regulator with internal pressure balancing 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 construction. Applied primarily in clean gaseous or liquid services. Truly a “DO-ALL” pressure regulator.

Inlet Design Pressure

• 10–1480 psig (.69-102.1 Barg)

Outlet Pressure

• 1/2"–1"(DN15–25): 1–450 psig (.07–34.5 Barg)
• 1-1/4"–1-1/2" (DN32–DN40): 1–400 psig (.07–27.6 Barg)
• 2" (DN50): 1–275 psig (.07–20.7 Barg)
• 2-1/2"–4"(DN65–100): 1–225 psig (.07–15.5 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

• Standard: Female NPT (screwed)
• ASME Flanged:125#, 150#, 250#, 300#,600#
• DIN Flanged: PN16, PN25, PN40
• Opt-31: British Standard Pipe Threads
• Opt-32: Schedule 80 Extended Pipe Nipples
• Opt-34: 14" Face to Face Flange Dimension
• Opt-41: Extension Tube Ends

Material Combinations: Body / Spring Chamber

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

* Through 2" (DN50) body size only

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

Features

• Versatile: Five basic materials and multiple trim material combinations to select from.
• Tight Shutoff: Multiple composition materials provide Class 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 and pressure balancing for higher inlet pressure. Results in unmatched 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 1000:1.
• Heavy-Duty Guiding: Both top and bottom guided to maintain stability and increased diaphragm life.
• Failure Position: Fails open on loss of P1 or P2 pressures.