Archives :: Processing & Handling :: Liquid, Gas and Air Handling :: Valves

Displaying 21 - 40 of 211 stories.
May 1, 2013
Minimizing process variability is an important component of a plant’s profitability. The performance of control valves within process control loops has a significant impact on maintaining consistent processes. This refresher outlines some of the important aspects of control-valve performance, including parameters of both the static response and the dynamic response. Static response A valve’s...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/Control-Valve-Performance_10469.html
May 1, 2013
For 40 years, this company has developed and manufactured bellows-sealed globe valves (photo) for hazardous applications in the chemical, petrochemical and nuclear industries. The...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/Bellows-sealed-valves-for-really-hazardous-chemicals_10492.html
May 1, 2013
The EasiDrive portable valve actuator effortlessly opens and closes valves in petroleum refineries, power plants, paper mills and chemical processing plants. Generating a torque of up to 2,000 Nm, this tool enables a...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/A-power-tool-for-opening-and-closing-valves_10494.html
April 1, 2013
Promation Engineering Designed for use on rising-stem globe control valves, the PL Series actuators (photo) provide up to 4,400 lb of force and up to 3.9 in. of travel. This increased up-and-down force, the company says...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/These-actuators-are-designed-for-large-pressures_10385.html
April 1, 2013
What if someone were to tell you that there is one method available for sizing relief valves that applies to virtually every situation, including two-phase flow and supercritical fluids? And what if they told you that method is more accurate and easier to use than traditional methods or formulas? As it turns out, both of these statements are true. The approach described here — the Direct Integration...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/The-Direct-Integration-Method-A-Best-Practice-for-Relief-Valve-Sizing_10394.html
March 1, 2013
  The 2040 digital position indicator uses a colored light signal, visible from a distance, to show the open or closed position of a valve. Four different color signals are used: open and closed by...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/Valve-position-indicators-that-tell-more-than-just-on-or-off_10266.html
March 1, 2013
Introduced last month, these two intrinsically safe solenoid valves (photo) have Ex ia IIC T6 certification. The solenoid operators are designed for use on the 327 range of direct-operated solenoid...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/Direct-acting-solenoid-valves-for-use-in-harsh-environments_10273.html
March 1, 2013
The Type 3738 electonic valve-position monitor can be used with on/off valves across a wide range of applications, and enables valve-position monitors to be configured at the push...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/Configure-this-valve-position-monitor-with-the-push-of-a-button_10290.html
February 1, 2013
The new Hard Seat VHS Micro-Dispense Valve offers repeatable, non-contact dispensing of fluids in the nano- to microliter range. It features a...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/This-little-valve-has-a-zirconia-ball-and-seat_10143.html
February 1, 2013
  With the newly developed, high-precision 4090 pneumatic volume booster it is possible to amplify the air strength of the set point signal from the positioner to the actuator such that these control valves (depending on the nominal valve...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/Control-valves-operate-four-times-faster-with-this-volume-booster_10167.html
February 1, 2013
Pressure-relief valves are widely and effectively used in situations where the pressure in a process vessel rises to above the vessel’s design-pressure rating. Proper relief-valve sizing is critical to plant and process safety to permit fluids sufficient flow area to exit the vessel. Sizing relief valves requires several equations for different flows (liquid flow, vapor flow and two-phase flow), as...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/Sizing-Calculations-for-Pressure-Relief-Valves_10173.html
January 1, 2013
The new micro dosing unit Type 7615 is a high-precision diaphragm pump for exact dosing in the microliter range. Comprised of three valves, the dosing unit doses 5...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/A-dosing-unit-for-microliter-volumes_10071.html
December 1, 2012
The Titan Series TSG valve is designed to meet the most demanding applications involving heavy-duty abrasive materials, such as sand, gravel, coal, whole grains, metal powders or minerals. The TSG Valve handles dry...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/Handle-heavy-duty-abrasive-materials-with-this-slide-gate_10002.html
November 1, 2012
The new V Series modulating ball valve is designed for controlling pressure, temperature flow and level. The valve body...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/A-new-valve-series-for-control-applications_9919.html
November 1, 2012
By expanding the valve line to include drive sizes up to 130 mm, globe valves, angle seat and diaphragm valves of the Element Series can now be used to achieve fittings up to...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/A-new-larger-drive-size-added-to-this-modular-valve-series_9923.html
November 1, 2012
Manual operators are often included on solenoid valves to enable functional checking during startup and commissioning. These operators are then removed prior to the plant being handed...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/This-solenoid-valve-operator-is-removable-under-pressure_9935.html
October 1, 2012
The new RapidDraw3D Valve-model Generator is a free automated valve-assembly model generator that allows users to quickly generate realistic, to-scale three...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/A-Web-based-application-for-generating-valve-assemblies_9816.html
September 1, 2012
The new GEMÜ 505 (hand-operated; photo) and 555 (pneumatic) angle seat valves were developed for pure steam shutoff valves, and are available in nominal sizes from DN 8 to DN 80. The valves provide an alternative to the...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/Aseptic-globe-valves-for-pure-steam-applications_9657.html
September 1, 2012
The MFO actuator from the proven 812/813 Series is a pneumatic actuator that was specially designed to be compatible with sterile and fine-chemical applications, and is particularly well suited for the tight space...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/A-hygienic-actuator-that-requires-less-space_9658.html
September 1, 2012
Though times are changing, many of the traditional challenges associated with running a chemical processing plant remain the same. For years processors have been asking for leak-proof, high-performance valves, but it is only recently that valve manufacturers are employing new technologies, designs and materials that improve performance and reduce leaks.   Improved Cv values “Traditionally...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/valves/Valves-An-Open-and-Shut-Case_9675.html
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