Quality, Prompt Delivery, and Customer Satisfaction

qualitySince the beginning of our business we have had three primary goals to accomplish.  These three goals have been the basis of our success over the past decades.  These three main factors are:

ONE… Kelley produces only the highest quality orifice plates at competitive prices.

TWO… our quick delivery time results in less down-time, less cost, and higher satisfaction for our customers.

THREE…  we sell only through reputable distributors who are knowledgeable about the requirements of the natural gas industry and who maintain only the highest standards of excellence.

Quality Control is Number One at Kelley

MitutoyoFrom the first inspection of raw materials to the final inspection prior to shipping, Kelley Instrument Machine, Inc. maintains a rigid quality control program.  We use only stretcher-leveled quality stainless steel sheets that meet our exacting specifications for orifice plate manufacturing.  Each machining stage is performed in a temperature controlled environment.  Each Kelley Orifice Plate is inspected multiple times throughout the manufacturing stages by Kelley’s highly skilled workers using certified, calibrated measurement apparatus traceable to the U.S. National Institute of Standards and Technology Registry.

We also utilize a yearly certified and calibrated Apex CNC CMM which assures bore tolerances are within the closest parameters that are currently available on the market.



Kelley Instrument Machine has been manufacturing quality orifice plates since 1975.  In all areas, we meet or exceed the standards set for the production of orifice plates by the American Gas Association Report #3, American Petroleum Institute 14.3, the Gas Processors Association 8185-90,  A.S.M.E. MFC-3M-1989 and I.S.A. ISA-RP3.2.



All Orifice plates maintained in inventory are manufactured according to A.G.A. / A.P.I. specifications.

At customer’s request, plates can be manufactured outside of these specifications with additional information required.