Bimetallic steam traps contain a valve that is opened and closed by the differential expansion of metallic disks.
Bimetallic steam traps are used in many industrial and commercial applications in the chemical processing, energy production, food processing, HVAC, pulp and paper, mining, petro-chemical and pharmaceutical industries.
Here is a video that illustrates how a bimetallic steam trap works. It shows the thermostatic principal involved and how two bimetallic plates interact and provide physical movement to open and close a valve seat to discharge condensate.
Providing problem solving and educational information about flow control, industrial valves, and valve automation. Have a question about industrial controls, valves, and valve automation? Give us a call at (303) 232-4100. Supplying products nationally, with a focus on the markets of Colorado, Utah, Wyoming, New Mexico, Montana, Arizona, Nevada, Idaho, and the western Dakotas.| www.msecinc.com
Basics of Heat Transfer
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Heat moves from hot to cold (image courtesy of ces.fau.edu) |
Heat exchangers facilitate this phenomena with tube bundles and vessels which separates the hot medium from the cold. Heat penetrates the surface of the tubes and is transferred to the contents of the vessel, thereby heating or cooling fluids or gases in the vessel or in the tubes.
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Selecting a Stainless Steel Globe or Gate Valve
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Stainless steel valves (courtesy of Aloyco) |
Stainless steel valves are required in many applications found in pulp and paper, mining, chemical processing, food processing, waste water, and fertilizer processing.
Care should be taken to select the most suitable valves for your service(s). Exact specification of each valve should be made to avoid possible ambiguity. When requesting quotations and/or ordering the product a fully adequate description should be made.
Selecting the Valve Size
Nominal size of the pipeline into which the valve will be placed must be determined.
Valve Material
The following facts should be considered in determining the correct valve material:
- the medium or media which will be controlled
- the temperature range of the line medium (media)
- the pressure range to which the valve will be subjected
- possible atmospheric conditions which may affect the valve
- possible extraordinary stresses to which the valve will be subjected
- safety standards and/or piping codes which must be met
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Advantages of a Wafer Check Valve
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Wafer check valve (courtesy of Duo-Chek) |
A wafer check is designed to be "sandwiched" inline between two pipe flanges in the piping system, adding very little additional weight or bulk to the piping layout. Wafer checks overall tend to be stronger, lighter, smaller, more efficient and less expensive than conventional swing check valves and are easier to install between standard gasket and line flanges.
Along with being lighter, easier to install and store, wafer check valves also offer the following advantages:
- Disc travel is short with less impact force caused by valve closing.
- The disc closes quickly with less water hammer pressure. Water hammer pressure is only 1/2 to 1/5 times of flange type swing check valve and flange type lift check valve.
- Low flow resistance.
- Horizontal and vertical installation available.
- Very low opening (cracking) pressure differential.
- More reliable due to lower impact forces, less water hammer.
High Performance Butterfly Valves for On/Off and Throttling Service
High Performance Butterfly Valves (HPBF) are a standard in many industries including heating, ventilating and air conditioning, power generation, hydrocarbon processing, water and waste water treatment. The key features of HPBV are high performance shutoff and modulating service for standard industrial process lines, materials of construction options include carbon and stainless
steel, sizes up to 48”, both wafer and lugged body styles available, in pressures classes 150 – 600.
Here is a short video introducing the Flowseal high performance butterfly valve.
Cooling Towers for Exothermic Reactions in Corrosive Atmospheres
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Delta Plastic Cooling Tower |
Many exothermic reactions occur when mixing harsh compounds or chemicals. These harsh chemicals have a negative impact on the performance of the process equipment handling the reaction. The equipment is also exposed to vapors and contaminants in the surrounding atmosphere. Metallic structures are the most prone to attack and corrosion.
When a cooling tower is needed in a corrosive or harsh environment, metal framed cooling towers with metal walls should be avoided. Instead, cooling towers with seamless, double wall plastic (HDPE) shells, corrosion proof construction, PVC piping and water distribution systems and totally enclosed motors are recommended.
Sample industries where plastic cooling towers are used in harsh environments are water treatment, waste water treatment, pulp and paper processing, primary metals processing, plating, and corrosive chemical production.
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