Restriction Orifice Unions
1/4" to 2" Socket-Weld or Female NPT Threads Restriction Orifice Unions Bored to Your Specifications
Restriction Orifice Unions feature one-piece stainless steel orifice plates shaped to match the union seat (ball to cone), eliminating the need for gaskets. The plates can be configured as recessed, pressed, or pressed with a tab, allowing easy identification of the orifice size without disassembling the union.
RESTRICTION ORIFICE UNION PRODUCT FEATURES:
- Designed for simple plate replacement
- Available in both Female NPT and socket-weld connections
- Seals will not loosen, even under extreme pressure
- Available with or without tabs for easy identification
- In-stock items ship within 24 hours
These unions are stocked in carbon and stainless steel bodies with pressure ratings of 3,000 PSIG. They come in line sizes ranging from 1/4" to 2" and offer female NPT or socket-weld connections. Non-standard sizes and materials are quickly produced upon request.
While orifices are typically bored based on your sizing calculation, we also offer sizing calculation services for a minimal fee. All orifice plates are stainless steel by default but can be ordered separately or combined with our restriction orifice unions.
NEED A BORE CALCULATION?
Let USA Industries' engineers calculate the correct bore size based on process data for the project.
Restriction Orifice Union Sizing Chart |
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|---|---|---|---|
| Size | A | B | 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" |
All Sizes in Inches
Note: USA Industries, Inc.'s orifice bore calculation service is provided on a professional fee basis.
Series 500, 520, 560, 590 & Restriction Union
Line Sheet
Frequently Asked Questions
Yes, we sell all 3 types of plates that can be bored to customer specs or as a blank plate.
No, there is also #6000 available, upon request.
This would depend upon your application, and the decision must be made by the customer.
Yes, female NPT and socket-weld connections are both available upon request.
Yes, we typically use the bore calculations provided to us by the customer, but we can do the bore calculations upon request for a small additional fee.
We stock our orifice plates in 304 & 316 stainless steel, but they are available in any material requested. We have produced orifice plates for clients in everything from monel to hastelloy to copper-nickel alloys and more!
Yes, we regularly coat our orifice plates for customers that request it. Just let us know what you need and we'll take care of you!
We're a manufacturer, completely capable to customizing or rushing an order through our facility to meet your deadlines. Between our rapid production abilities and massive in-stock inventories, we believe we can hit almost any deadline you require.