Jack Siedler Jack Siedler has spent 41 years in the valve industry, including his current nine-year stint as a technical sales specialist with Assured Automation. During his career, Mr. Siedler has worked with bar stock globe control valves (with customized trim), rising-stem three-piece, three-way globe valves and spring and diaphragm-actuated diaphragm control valves. He has experience with sizing valves for chemical and pharmaceutical applications and has provided technical input for valve applications in the nuclear and fossil power industries. CCI / BTG VALVES In 2001 BTG Specialty Valves was acquired by CCI and changed its name to CCI Sweden. The products are branded 'BTG Valves.' CCI is the world's leading manufacturer of severe-service control valves and hydraulic and pneumatic actuators. Trim, Soft-Seated: Valve trim with an elastomeric, plastic or other readily deformable material used either in the. The style of valve used and the sizing of the valve can have a large impact on the performance of the control valve assembly in the system. Siedler has also worked with the NAVSEA () engineering group in Crystal City, Va. On valve applications for the military market. Siedler can be reached at or 732-381-2255. Dell storage manager driver uninstallation will not continue. Q: For many applications, valve sizing and selection will determine the ultimate success or failure of the larger process. In your opinion, what are some key steps end-users can take to ensure the proper sizing and selection of valves? A: For the purpose of the following line of questions, let’s define the type of valves we are discussing. Years ago, control valves were generally thought of as throttling control valves. Today, however, many consider actuated on-off valves as control valves as well. For the sake of this discussion, I am going to assume we are considering both. Throttling control valves include the rising-stem type of valves, both soft-seated and metal-seated, and quarter-turn valves, both soft-seated and metal-seated with standard trim or characterized trim, coaxial, angle-seated, and diaphragm valves. Once the appropriate type, or types, of valves for the application have been identified, the user should then attempt to determine the “approximate” size of the valve that is required. A user can effectively determine a rough valve size either by using an appropriate formula or sizing program. Open ocr files. The OmniPage File Converter will give you the productivity boost you’ve been looking for by preventing you from having to retype documents so you can get things done faster and more efficiently. Valve Selection Regarding valve selection, users should first analyze the material of construction of the valve based upon compatibility with the media being handled. If there are a number of choices, select a few and rate them regarding their relative compatibility. The end-user is generally the best source for this determination, because in the majority of cases, it is the user that has prior experience with the media being handled, and they know more about it than anyone else. For example, the users may know the piping material that has been successful in handling their particular media. Quite often, the media is a unique mixture of chemicals. Standard chemical compatibility charts may be inappropriate for materials of construction in such cases. Know the characteristics of the media you are handling – is it a relatively easy product to handle (air, water, inert gas) or is it toxic, corrosive, abrasive, carcinogenic; does it polymerize, solidify, crystallize; does it contain fine particulates; is it a slurry, does it have a high coefficient of expansion? ![]() All of these characteristics should be considered. With the size, the materials of construction, the characteristics and the pressure/temperature of the media, as well as the pressure class of the piping system, the end-user can now look for the appropriate type (or types) of valve to handle the application. Armed with this information, the user can approach valve vendors for guidance in choosing the appropriate valves for the application. And once the appropriate valve has been chosen, the user can proceed to the task of sizing. Valve Sizing Valve sizing is the procedure of determining the appropriate flow coefficient (Cv) for the valve and the application.
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