End connections provide the means for installation of control valves in pipelines. Popular end connections include several types of screwed pipe threads, bolted and gasketed…

The previous discussions of gasket and packing material selection underscore the importance of the temperature ratings of all the control valve components. The temperature limits…

Basic Packing Selection Considerations – The general rule for packing material selection that is suggested by most valve manufacturers is as follows: • If the…

Adjustable Belleville Spring Operation – During installation, the Belleville springs are compressed until the indicator disk aligns with the maximum (MAX) compression line on the…

Live-Loaded Packing With Load Scale – For extremely high temperature and high pressure applications, a graphite packing arrangement that does not include PTFE packing washers…

Low Leakage Graphite Packing – When low leakage is required at higher temperatures and pressures, graphite packing rings are included in the packing arrangement. Refer…

Low-Leakage PTFE Packing – PTFE cold forms easily and it does not have good memory; i.e., after PTFE becomes deformed, it does not return to…

Low Leakage Packing – In North America, the Environmental Protection Agency (EPA) has recently enacted strict guidelines for the maximum allowable leakage of specific pollutants…

Jam Style Graphite Packing Arrangements – Graphite packing arrangements are commonly specified in applications where high temperatures (temperatures above 450 degrees F) disallow the use…

Jam Style PTFE Packing Arrangements – In some applications, a jam style packing arrangement is preferred to the spring-loaded design. A double, jam style, PTFE…