Also known as orifice plates, these mount between orifice flange unions.

When inlet pressure changes, these orifices automatically adjust to deliver a consistent outlet flow. They connect to threaded pipe, or fit into threaded holes

Push tubing into these orifices, and an internal ring holds them in place. They're for use with plastic and soft metal tubing.

Compression fittings bite down on the outside of hard metal tubing for a secure connection.

Also known as flow restrictors and precision orifice valves, these orifices are used to throttle, vent, bleed, or regulate flow in water systems.