I D
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical EngineeringChementator Briefs
Ethylene dichloride Recently, Chemetry (Moss Landing, Calif.; www.chemetrycorp.com) and Braskem…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEENGINEERING PRACTICEEQUIPMENT & SERVICESFOCUSNEW PRODUCTS + Show More

Comment PDF Automation & Control

Key Considerations in Specifying Control Valves

By Satyendra Kumar Singh |

Follow this guidance to specify a control valve accurately during the design phase   Control valves are one of the most common and important instruments used in the chemical process industries (CPI). They help to ensure smooth and efficient operation of process plants, by achieving the desired operating parameters by means of regulating the fluid flow in connected pipes. The need to properly specify control valves during the design phase of a plant cannot be overemphasized. The size of a control valve is derived from a parameter called the flow coefficient ( C v), which is defined as volumetric flowrate (in gal/min) of water through the valve at 60°F when pressure drop across the valve is 1 psi ( C v is calculated using the formula given in the standard ISA-75.01.01-2007). Process engineers should take the following aspects into consideration when specifying control valves, to ensure that the valves that are manufactured by the vendors function according to the requirements. 1. Controllability. While specifying a control valve during the design phase, the process engineer should ensure that the valve’s controllability must be good over the entire range between minimum and maximum flowrates. This can be done by estimating the…
Related Content
Focus on Valves
    A new motorized control valve for the semiconductor industry The 2/2-way diaphragm globe valve C53 iComLine (photo) was…
Introducing a new range of valve actuators
Launched in March, the E2HR Series Electro-Hydraulic Rotary valve actuators (photo) feature a very small installation envelope for¼-turn valve-actuating applications.…
Show Preview-IFAT
IFAT (rescheduled for September 7–11, Munich, Germany; www.ifat.de) is the world’s leading tradefair for water, sewage, waste- and raw-materials management.…

Andritz

The Influence of IIoT in the Dewatering Process Step of Pigment Production

Taking a look at dewatering, an important step at the heart of the colour pigment production process. By using a method for a calcined kaolin pigment as an example, we explain how an intelligent filter press can improve pigment production.

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
The influence of IIoT in the dewatering process step of pigment production
The Big 6 level measurement technologies, where to use them and why
Top five technologies for drying in chemical applications
Crude distillation unit (CDU) optimization
Upstream Oil & Gas: Automation intelligence from wellhead to distribution

View More