A typical rising stem valve showing the effects of water contamination

Mitigating MOV stem nut failure through proper maintenance and wear measurement

A major problem with stem nut thread failure is that stem position is usually interpolated from the number of stem nut rotations. If the stem nut threads strip out, the stem nut will still turn but will give a false indication of position to the control room. Such a failure of control and indication on a valve could cause a critical safety or environmental incident. This paper reviews approaches to stem nut maintenance and introduces a more scientific approach to measure stem nut thread wear. Read more...
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Valve World Magazine
Pneumatic actuators for pulp and paper plants

Pneumatic actuators for pulp and paper plants

The "kraft process" is a method of converting wood chips into pulp and then to cellulose fibers. This...
20 September 2017

MMP to construct Delaware crude oil pipeline

Magellan Midstream Partners, L.P. (MMP) is commencing construction of a new Delaware Basin pipeline ...
20 September 2017
Orbinox knife gate valves for bulk handling

Orbinox knife gate valves for bulk handling

ORBINOX ‘BC’ series square ported knife gate valve technology was selected for use on a coal mill rejects...
20 September 2017

MWP announces strategic reorganization

Mueller Water Products, Inc. (MWP) announced its strategic reorganization plan designed to accelerate...
20 September 2017

Union Tech added to ExxonMobil’s AML

Union Tech Co., LLC was added to the latest edition of the ExxonMobil Piping AML and will be listed under category 7.4 (PI 608 / ASME B16.34 – Metal Seated, Floating Ball) in the ball valve section.Prior to February 2017, Union Tech supplied ExxonMobil, as well as other companies, with severe-service...
19 September 2017

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