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Model 8311LP

Back Pressure Regulator

SKU#:

Model 8311LP

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Overview

The Model 8311HP and 8311LP are high capacity, self-contained back pressure/relief regulators with a double-seat design. These units are utilized to control inlet (upstream) pressure between 1 and 200 psig (.07-13.8 Barg). Available in two inlet pressure designs; LP - larger diaphragm design for relief pressures up to 39 psig (2.69 Barg), and HP - smaller diaphragm design for relief pressures up to 260 psig (17.93 Barg).

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Description

The Model 8311HP and 8311LP are high capacity, self-contained back pressure/relief regulators with a double-seat design. These units are utilized to control inlet (upstream) pressure between 1 and 200 psig (.07-13.8 Barg). Available in two inlet pressure designs; LP - larger diaphragm design for relief pressures up to 39 psig (2.69 Barg), and HP - smaller diaphragm design for relief pressures up to 260 psig (17.93 Barg).

Inlet Design Pressure

  • Up to 39 psig (2.69 Barg)
     

Outlet Pressure

  • 1 psig (.07 Barg) to 30 psig (2.1 Barg)

Line Sizes

  • 1-1/2" (DN40)
  • 2" (DN50)
  • 2-1/2" (DN65)
  • 3" (DN80)
  • 4" (DN100)

End Connections

  • NPT
  • FLANGED
  • RAISED FACED
  • FLAT FACED
  • 14" FACE TO FACE

Material Combinations: Body / Diaphragm Case / Spring Chamber

  • CI/CI
  • CS/CS

CI = Cast Iron
CS = Cast Carbon Steel

Features

  • High Capacity: The highest capacity back pressure regulators Cashco manufactures due to dual ports.
  • High Stability: Outstanding operation resulting from balanced design which maximizes opposing plug forces, even at very low pressure drops. Diaphragm isolated from fluid velocity effects.
  • Heavy Guiding: Plug is top and bottom guided with hardened stem guides.
  • Broad Setpoint Range: 1-30 psig (.07 - 2.1 Barg)
  • High Pressure Drop Capability: Up to 260 psig.
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