Restriction Orifice Unions

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.

Our machining process includes ISO and LEAN principals, our CNC machines are always updated for maximum efficiency

Deane Clark, Production Manager, Mac-Weld

See factory for details