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Bronze companion flange coupling with cup and flange ends

Nibco, Inc.

Nibco, Inc. 771-LF 4 in Bronze Companion Flange Coupling

SKU CH-CE2W-3TNBQ

Connects 4-inch copper tube to a Class 150 bronze flange rated for 235 psi and 200°F

  • Class 150 flange rated for 235 psi working pressure
  • Sweat cup connection fits 4 in copper tube
  • Bronze body withstands 200 °F service temperature
  • 8 bolt holes on 9 in diameter flange
  • 11/16 in flange thickness adds joint strength

4 in Bronze Companion Flange

This 4 inch bronze companion flange couples copper tube to a flanged connection in air or non-potable water systems. The sweat fitting adapter accepts a 4 1/8 inch outer diameter tube on the cup side and presents a Class 150 flange face with eight bolt holes. It is suited for installers joining copper piping to flanged valves or equipment.

Verify tube size and pressure rating

Confirm the existing copper tube measures 4 1/8 inch outer diameter to match the cup connection. Ensure the system design pressure does not exceed 235 psi and the operating temperature stays within 200 degrees Fahrenheit. Check that the mating flange uses the same eight bolt pattern with 3/4 inch bolt holes.

Bronze body with Class 150 flange

The bronze construction resists corrosion in the stated applications while the 11/16 inch thick flange provides a rigid mating surface. Eight bolt holes allow secure fastening to a companion flange or flanged component. The sweat cup connection requires soldering skill and proper flux for a leak-free joint.

Highlights

  • Class 150 flange rated for 235 psi working pressure
  • Sweat cup connection fits 4 in copper tube
  • Bronze body withstands 200 °F service temperature
  • 8 bolt holes on 9 in diameter flange
  • 11/16 in flange thickness adds joint strength

Specifications

BrandNIBCO

Questions about this item

Does the 4 in bronze companion flange coupling include bolts or gaskets, or must they be purchased separately?

The coupling itself is the only component listed; bolts and gaskets for the eight 3/4 in bolt holes are not included and must be sourced separately.

Is the Class 150 rating the only pressure class available for this 4 in size, or are other classes offered?

The specifications show a single Class 150 companion flange rated to 235 psi at 200 °F; no alternative pressure classes are mentioned for this model.

What does the 235 psi maximum operating pressure mean when the flange is installed on a copper tube system?

It indicates the assembly can safely handle up to 235 psi at temperatures up to 200 °F when properly soldered to 4 1/8 in OD copper tube and bolted to a mating flange with a suitable gasket.

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