Model ALR-1

Description

Model ALR-1 is high performance, pressure loaded diaphragm-type, flow-to-open pressure reducing regulator. Design includes an internal pressure balancing pistoncylinder that provides high flow capacity and high pressure drop capability. The internal trim design allows the same basic unit to cover a broad range of pressure settings. Performance meets or exceeds that of competitive pressure loaded or pilot-operated designs. A back pressure regulator or "unloader" is piped to the top of the dome and is "set" to control the outlet pressure of the pressure reducing regulator.

Inlet Design Pressure

• Up to 700 psig (48.2 Barg)

Outlet Pressure

• 2.0 - 400 psig (0.13 - 27.6 Barg)
• Multiple spring - ranges dependent on selection of the unloader

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
• ASME Flanged: 125#, 150#, 250#, 300#, 600#
• DIN Flanged: PN16, PN25, PN40
  • (Integral Flanged Body unless listed under Opt.-30)
• Opt-31: British Standard Pipe Threads
• Opt-34: 14" Face to Face Flange Dimension

Material Combinations: Body / Cover Dome

• DI/DI
• BRZ/BRZ
• SST/DI
• CS/DI
• BRZ/DI
• SST/CS
• CS/CS
• SST/SST

DI = Ductile Iron
CS = Carbon Steel
BRZ = Bronze
SST = Stainless Steel

Features

• Versatile: Five basic materials and multiple trim material combinations to select from. Multiple methods of pressure loading.
• 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 majority of applications.
• Droop: Highly accurate outlet pressure control, due to absence of range spring in design, provides almost zero “droop effect”.
• Trim Design: FTO and pressure balancing allows for higher inlet pressure. Results in unmatched sensitivity and stability. Internals are cage-contained with in easily removable quick change trim.
• Rangeability: Basic valve gives outstanding rangeability due to close tolerances, balanced trim, and a broad range of elastomeric and metallic diaphragms and soft seats. Can be as high as 2000:1.
• Heavy-Duty Guiding: Both top and bottom guided to maintain stability and increased diaphragm life.
• Failure Position: Fails closed on loss of loading pressure.