Restriction Orifice Unions

All our restriction orifice union cups can be bored to specifications based on the customers application.

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.

Mac-Weld is a true partner. Their team works very closely with ours to understand business opportunities in-depth, thus ensuring a competitive, high quality and appropriate solution in a timely fashion. Mac-Weld is one of our most critical and valued suppliers.

Sam J., OEM customer

Restriction Orifice Unions

All our restriction orifice union cups can be bored to specifications based on the customers application.

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

Mac-Weld is a true partner. Their team works very closely with ours to understand business opportunities in-depth, thus ensuring a competitive, high quality and appropriate solution in a timely fashion. Mac-Weld is one of our most critical and valued suppliers.

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