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...

Email info@LambdaSquare.com   

See All Products
Browse our entire line...
Calibration Services
NIST certified facilities...
Technical Inquiry
Tell us your requirements...
Clients & Applications
Examples of typical installations...

Product information and specifications, company forms, project inquiry.

About Us
Credit Application

About the Oripac Model 5300 Dimension Sheet Tech Support Sheet
Part No. Reference System Specification Sheet Installation Instructions
General: Many of the installation problems associated with standard orifice plates have been eliminated by the use of the Oripac. Simply follow these instructions for an accurate and reliable meter.

Pipe Requirements: Upstream and downstream pipe requirements are contingent upon two factors: (a) Beta Ratio:-ratio of the orifice bore "b" divided by the inlet bore (pipe l.D.)  (b) The type of fitting or disturbance upstream of the Oripac. For most applications, 10 pipe dia. upstream & 5 dia. downstream are sufficient. (5 pipe dia. up and 2 dia. down are acceptable for non-critical application.) Refer to additional piping requirement sheet for specific scenarios.

Installation Tips: (a) If possible, do not install a valve upstream if it is going to be throttled. Install on the downstream a minimum of 6 diameters from the Oripac. (b) The use of straightening vanes is not necessary for most applications.

Actual Installation: (a) Insert bolts through bottom half of the flange bolt circle. (b) Slide Oripac between flanges (make sure arrow on Oripac faces in the direction of flow) (c) Make sure pressure connections are properly positioned.  Oripac can be installed vertically or horizontally. For horizontal liquid lines, install the Oripac with the connections on or under the horizontal center line. For horizontal air or gas lines, install with the connections on or above the horizontal center line. They should also be correctly oriented so as to not be blocked by bolts when remainder of bolts are inserted: (d) Add rest of bolts and nuts leaving all bolts loose so Oripac is free to move. (e) If necessary, the Oripac can be centered using a steel ruler to measure the total side to side movement and set Oripac at half way point all around. (f) Lubricate & tighten bolts diametrically alternating to recommend flange torque. (g) Check to insure the Oripac is installed with the arrow facing in the same direction as flow.

On Model 4150 only, do
not remove pressure fittings or nipples
as they are permanently attached.
Use wrench to steady pressure
fittings/nipples when installing additional

*Bolts should be 1.25” longer than standard make up flange bolts.

Connection Kit:
Includes 1/4" and 3/16" SS Extension Nipples with 1/4" and 3/16" SS Full Port Ball Valves - FNPT Ends.

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 1998-2019 Lambda Square, Inc. All rights reserved.

Designed and deployed by Industrial Advertising Links Page