An alternative design to control flow, with a wide range of options.

Restriction orifice unions feature a single piece metal orifice plate that fits perfectly into the union seat, eliminating the need for a gasket. Orifice unions are commonly used in fire pump systems, since they have the ability to handle higher levels of pressure while maintaning a smaller overall pipe size.

  • Available with pressure ratings of 3000 and 6000 psig.
  • Threaded and socket-weld connections available
  • Unions are available in A105 carbon steel or 316 stainless steel, along with other materials
  • Available in pipe sizes ranging from 1/8” – 2”

Material Options: A105 carbon steel or 316 stainless steel

Industries: Any industry that requires flow measurement, including coolants, gases, steam and water.

  • Restriction Orifice Union 1
  • Restriction Orifice Union 3
  • Restriction Orifice Union 2

We have been using Mac-Weld for over 20 years and find them a true team vendor with quality, a great supplier.

Mary J., OEM manufacturer of Instrumentation

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