Email Document Reference

Enter your email address below and the reference for this document will be sent to shortly from webmaster@ceesi.com.

Title: Obtaining Performance From Regulators
Author: C. E. Terrell
Source: 1940 Southwestern Gas Measurement Short Course (Now called ISHM)
Year Published: 1940
Abstract: One of the first essentials to getting good performance from a regulator is that it be kept in good mEchanical condition. Tight packing glands, worn or eroded valve guides and valves, crooked valve- and diaphragm-stems, off-center diaphrasjms or carelessly adjusted valves, arc sources of trouble which work to defeat our efforts toward the perfect pressure line. The parts requiring most frequent attention arc the valves and in replacing them or making adjustments they should be so positioned on the stem that they will make a perfectly co-ordinated contact with their seats. A test for this adjustment may be conveniently made by closing the valves on narrow strips (approx. % wide) of cellophane or cigaret paper. When both valves take hold of the strips they are in practically perfect adjustment. This careful adjustment is especially important on soft-seat valves where a complete shut-off and no pressure build is desired. If one soft valve contacts its seat slightly in advance of the other scat a high lock-up pressure will occur. In making any adjustment on valves care should be taken to see that lock-nuts are left perfectly tight otherwise they will work loose. A final test for lock-up may be made by cracking the upstream gate admitting a slight flow of gas while the outlet side of the valves is at atmosphere then holding the valves closed by hand or lever.

In order to prevent spam and automated file downloads for documents within the Measurement Library, please follow the instructions below and then you will be able to email a reference to this article.