Orifices | McMaster-Carr

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1,057 Products

How to Measure Fittings

Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.

Threaded Flow Control Orifices

Connect these orifices to threaded pipe, or insert them into threaded holes.

Push-to-Connect Flow-Control Orifices

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

Compression Flow-Control Orifices

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

Barbed Flow-Control Orifices

Insert the barbed ends of these orifices into rubber and soft plastic tubing, and secure them with a clamp.

Press-In Flow-Control Orifices

Press these orifices into machined holes in connectors, manifolds, and other custom parts.

Flange-Mount Flow-Control Orifices

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

Pressure-Compensating
Threaded Flow-Control Orifices

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

Flow-Control Flange Unions

Measure, throttle, and regulate the flow of liquids and gases in your line by adding an orifice plate to these unions.

Flow-Control Orifices for Water

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

Flow-Control Orifices for Chemicals

Made of PVC, these orifices have excellent resistance to a wide range of corrosive chemicals.

Flow-Adjustment Valves for Dry Material

Also known as iris valves, these control the flow of powders, grains, and other dry material through bins and hoppers.

Metal Pipe and Pipe Fittings

Steel Bleed Rings

Access the inside of lines, so you can vent pressure, drain liquid, or take samples. Made of black-coated steel, these bleed rings should be used in dry environments to prevent rusting.

Stainless Steel Bleed Rings

Create an access point in systems where corrosion is a concern. Made of stainless steel, these bleed rings resist rusting.