Orifice plates, differential pressure flow measurement equipment, venturi tubes, ASME flow nozzles, restriction unions and more...
Over 50 Years of Differential Pressure Flow Metering Experience...

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ABOUT THE RESTRICTION ORIFICE UNIONS
Designed and calculated to restrict or 'knock-down' pressure.
Used on smaller pipe sizes and eliminating flanges.

 

HEX NIPPLE:
Body — Brass or SS
Orifice — Sapphire/Nylon Sleeve
Max Operating Pressure — 100 psig
Orifice Sizes — .0012" to .0252" Dia.
Connections — 1/8" NPT

SPECIFICATIONS:
Materials:
  Orifice Plate — 316 Stainless Steel
  Union — A105 Carbon Steel or 316 SS



Sizes — 1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2"
Connections — NPT or Socket Weld



Pressure Rating:
  Carbon Steel — 3000 PSI
  Stainless Steel — 3000 PSI




Ordering Information:
If orifice size is known, provide 1) Orifice Size, 2) Connection Size, Union Material and Connection Type.

If orifice size is unknown, please provide 1) Connection Size, 2) Union Material, and 3) Connection Type.
Plus, all of the following data;
- Fluid Type
- Fluid Supply Pressure and Temperature
- Pressure Differential Across Orifice
- Required Flow Rate
- Pipe ID



Extra Plates: To order plates only, provide the same information as required above.

STANDARD and TAB TYPES
Ends:
FNPT or Socket Weld
Ratings: Hex 3000# Standard / Hex 6000# Available

Each union is furnished with one 316 stainless steel orifice plate (bored or blank) Plates bored to 0.020" minimum standard. Laser drilling available for smaller bores. Unions available in standard materials (1/4" - 2" line sizes) - carbon steel, 304SS, 316SS.
Monel, aluminum, PVC, brass and other materials available upon request.
Unions feature 'metal-to-metal' seal.
Double "O" Ring type available for standard unions. O-Ring material and body material as per application.
Standard pipe unions - 'non-orifice' - also available.
Custom fabrication of special sizes available.
Pipe Size
A
Socket
Bore Dia.
Across
Flats
D*
Socket
Depth
WT. (lbs)

1/4"

1.750

0.555

0.750

1.375

0.438

0.36

3/8"

1.875

0.690

1.000

1.570

0.563

0.52

1/2"

2.000

0.880

1.125

1.800

0.625

0.72

3/4"

2.375

1.090

1.375

2.200

0.688

1.24

1"

2.500

1.360

1.625

2.560

0.750

1.75

1 1/4"

2.875

1.700

2.040

3.060

0.813

2.61

1 1/2"

3.125

1.950

2.310

3.430

0.875

3.40

2"

3.500

2.440

2.875

4.090

1.000

5.40

* This dimension chart based on stainless steel unions.


Lambda Square, Inc 1-800-587-5423 Tel: 631-587-1000 Fax: 631-587-1011


Lambda Square, Inc. specializes
in the manufacture of differential pressure flow measurement equipment including venturi tubes, orifice plate and orifice flanges, meter tubes, orifice holding blocks, orifice restriction unions, sanitary plates, single and dual chamber fittings, ASME flow nozzles, manifolds, straightening vanes, elbow flow meters, seal pots and many other liquid, gas and steam control products.
Please contact Lambda Square with any questions concerning design and custom manufacture.
Copyright 1998-2017 Lambda Square, Inc. All rights reserved.



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