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Flow Measurement Orifice Plates

Restriction
Orifice Unions

Simple to use and easy to troubleshoot
PRECISION
CNC
MACHINING
For superior accuracy and quality control
  • Restriction Orifice Unions
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Product Overview
Restriction Orifice Unions
Precise Flow Control & Pressure Management

Restriction Orifice Unions feature one-piece stainless steel orifice plates shaped to match the union seat (ball to cone) — eliminating the need for gaskets. Plates can be configured as recessed, pressed, or pressed with a tab for easy orifice size identification without disassembly.

Construction
Stocked in carbon and stainless steel bodies rated to 3,000 PSIG — seals will not loosen even under extreme pressure. Non-standard sizes and materials produced quickly upon request.
Sizes & Connections
Line sizes from 1/4" to 2" — available with female NPT or socket-weld connections to suit your installation.
Plate Configurations
Available as recessed, pressed, or pressed with tab — tabbed design allows easy identification of orifice size without disassembling the union.
Plate Replacement
Designed for simple plate replacement — no gaskets required, reducing maintenance time and parts inventory. In-stock items ship within 24 hours.
Applications
Compressed Air Water Steam Hydraulic Fluids Gases Chemicals Coolants
USA Industries
(800) 456-8721  ·  usaindustries.com
Restriction-Orifice-Union-Side-View-Cut-in-Half-2
Technical Data Sheet
Restriction Orifice Union
DS-ROU-001 Rev. Current
SizePipe Size ADim. A BDim. B CDim. C
1/4"1 3/4"1/4"1 3/8"
3/8"1 7/8"3/8"1 5/8"
1/2"2"1/2"1 3/4"
3/4"2 1/4"3/4"2 3/16"
1"2 9/16"1"2 9/16"
1 1/4"2 7/8"1 1/4"3 1/16"
1 1/2"3 1/8"1 1/2"3 7/16"
2"3 1/2"2"4"
Size Range 1/4" – 2"
All Dimensions Inches
Compliant ASME
Dimensional Notes
All dimensions in inches
USA Industries
(800) 456-8721  ·  usaindustries.com

Frequently Asked Questions

Why USA Industries?

40+ years of manufacturing excellence and innovation

Fast Turnaround

Fastest Turnaround

Same-day shipping on stock items. Custom orders in days, not weeks.

In-House Manufacturing

Manufactured In-House

U.S. produced steel, PMI verified, QC certified.

ISO Certified

ISO 9001:2015 Certified

Quality-driven manufacturing process ensures excellence.

Engineering-Innovation

Engineering Innovation

Precision-Engineered Industrial Solutions — Delivered Fast!

USA Materials

100% USA Materials

All raw materials sourced from American mills.

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