Process hazard analysis (PHA) is required by U.S.
August 3, 2016
To better understand the actuators and controls in our water systems, we discussed the types and some of the considerations for sizing in the first part of this article, which appeared in the print version of VALVEMagazine and is posted here.
July 7, 2016
Actuators and controls are a critical process of how we move water through our supply and waste systems.
July 5, 2016
VMA is presenting a one-day version of its popular Valves, Actuators & Controls 101 educational program on July 14, the day before Valve World Americas Expo & Conference.
May 13, 2015
The error output from a control valve can come from a variety of sources: uncontrolled input pressure, uncontrolled input flow rate, inaccurate orifice size or turbulent flow through the system which causes irregularity of flow rates through the system.
February 23, 2015
The combination of North American shale fields that continue to fuel high levels of new domestic oil and gas projects and ongoing global efforts means the need for efficiency in instrumentation selection has never been higher.
February 17, 2015
Back in the “early days,” we were taught that, to properly control flow, we should select a linear valve characteristic when the valve controls more than 25% of the piping system pressure drop at full flow.
December 15, 2014
The number of valves and valve types that go into modern process plants today to precisely control operations is huge.
February 19, 2014
Compression packing is found in applications ranging from transmission of natural gas and water to caustics and high-temperature steam.
January 22, 2014
Hydrogen is very reactive and highly explosive, and it is composed of the smallest molecules known to man.
July 22, 2013
Emerson’s Fisher FIELDVUE DVC6200 digital valve controller series now incorporates a 4-20mA position transmitter that can also be configured as a discrete switch.
May 21, 2013
In their presentation at the Valve Repair Council Repair Meeting & Exhibition, Nov. 1 and 2, 2012, in Houston, Bob Donalson and Kevin Simmons of Pentair Valves & Controls shared valuable information about maintenance and repair programs for pressure-relief valves.
February 12, 2013
