Kalrez® News 1 - Article 12

DuPont Dow Features Kalrez® KVSP™, Kalrez® At ISA Conference And Exhibition Oct. 21-24

* Copyright for photograph

DuPont Dow Elastomers will feature Kalrez® KVSP™ valve stem packing systems and Kalrez® perfluoroelastomer parts at its booth (#2038) at the Instrumentation, Systems and Automation (ISA) conference and exhibition in Chicago Oct. 21 to 24.

Kalrez® KVSP™ can help to significantly reduce fugitive emissions and improve process control to overcome the deficiencies of polytetrafluoroethylene (PTFE) and graphite packing systems. PTFE can creep and cold flow during temperature cycling which leads to increased fugitive emissions and graphite systems can restrict valve movement causing inconsistent process control.

The resiliency of KVSP™ provides improved sealing for control valve stems to help keep emissions below 1ppm. KVSP™ also improves a valve's ability to react quickly and smoothly to process changes. KVSP™ helps to move a control valve's performance closer to the ideal through low stem friction and low deadband therefore reducing process control variability.

Recent interest in the poor, dynamic response of control valves has resulted in a new ISA standard, and in the development of simple calculation methods to determine the dynamic requirement specifications for control loops and valves. Specifiers of control valves who want to explore methods of calculating control valve response should attend a technical paper at ISA on Wednesday, Oct. 23, at 9:30 a.m. called, "A Method to Determine Control Valve Dynamic Requirements" by Cullen Langford. Langford notes that many process control problems are caused by poor dynamic response of control valves. Control valves may respond slowly and unpredictably and reduce the ability to control.

Basic calculations can explain control loop problems and help solve frustrating process control loops. The method applies to both new design and existing installations. Process basic data and simple math provide the basis for the analysis. Langford compares control valve packing systems including graphite, PTFE and perfluoroelastomer.

About DuPont Dow Elastomers

DuPont Dow Elastomers, a global supplier of specialty elastomers with global headquarters in Wilmington, Delaware, is a joint venture between the DuPont Company and The Dow Chemical Company, with more than US $1 billion in sales. The company is the industry leader in chloroelastomers, ethylene elastomers and fluorinated elastomers, serving the automotive, chemical, construction, general rubber and wire and cable industries.

Kalrez® is a registered trademark of DuPont.

* © Photographer: Henry Azui of Arnhem, Gelderland, Netherlands | Agency: stock:XCHNG

Next Article: Article 11: DuPont Dow Elastomers Features New, Low Particle Generation Kalrez® Seals At SEMICON West