A versatile design for flow control, offering a wide range of options to meet various needs and applications.

Restriction orifice unions feature a single-piece metal orifice plate that fits directly into the union seat, eliminating the need for a gasket. Commonly used in fire pump systems, these unions can handle higher pressure levels while maintaining a compact pipe size. This design also makes them ideal for small bore applications, offering both durability and efficiency in a smaller footprint.

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

Material Options: A105 carbon steel or 316 stainless steel

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

  • Restriction Orifice Union 1
  • Restriction Orifice Union 3
  • Restriction Orifice Union 2
American Thermowell Orifice Plate Catalogue

American Thermowell Orifice Plates and More Catalogue

Available in a variety of styles, sizes and materials, see our catalogue for more details.

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