Advertisement Feature - Cover Story The Art of Diverting
Diverters by DMN-WESTINGHOUSE come in many types and sizes, suitable for a specific use or a variety of applications
Last year DMN-WESTINGHOUSE introduced the new SPTD plug diverter. This diverter has a single straight pipe and is very suitable for applications in the food, pet food, plastics and petrochemical industries. The design of the SPTD plug diverter conforms to all current legislation regarding safety in the workplace. Consequently there are no moving parts on the outside. The new SPTD has been designed to be user friendly, pressure shock resistant and with standard static seals suitable for pressures up to 3 bar g. All sizes are optionally available with inflatable seals.
The SPTD has been specially designed to route powders and pellets with minimum degradation in pneumatic conveying systems. A smooth passage of product is guaranteed by precision machining, very effective sealing and a complete obstruction free passage. The user friendly fool proof design enables fast in situ internal examination, cleaning and, if necessary, replacement of seals. The SPTD has been available in sizes from 150 mm up to 400 mm, but currently extending the range with sizes 80, 100 and 125 mm is being researched.
USDA dairy accepted The DMN-WESTINGHOUSE tube diverter range have been updated and completed in the past few years. Available in 2 ports (2-TDV), 3 ports (3-TDV) and 4 up to 14 ports (M-TDV), the complete range was recently evaluated by the USDA (United States Department of Agriculture) Dairy Grading Branch, Equipment Design Review Section, and attained the Acceptance Certificate to be compliant with the USDA Dairy Equipment Guidelines. The whole range of tube diverters (2-, 3- and M-TDV) are of a sanitary design and have stainless steel AISI 316 product contact parts with a multiple choice of line connections, ranging from a simple pipe connection to a milk coupling.
The swan neck pipe connecting the inlet to outlets is designed to give minimum product degradation in every conveying direction. All conveying lines that are not in use are also sealed at the diverter outlet. This ensures that there is no air or product leakage from destinations that are not being used. The uniquely designed seal that has already been proven on the M-TDV is also being used on the 2- and 3-TDV. This seal is made from EPDM and is very easy to fit and clean, and being inflatable guarantees absolutely tight sealing in the conveying line up to 3 bar g. (higher on request) This also applies to liquids.
Diverter range Two well known members of the DMN-WESTINGHOUSE plug diverter range are the PTD dual pipe plug diverter and the GPD gravity plug diverter. The PTD is a universal diverter, specially designed to route powders and pellets with minimum degrada- tion in pneumatic conveying systems. The GPD is a two-way, demountable gravity diverter and is ideal for system installation that require frequent cleaning with minimum downtime. The rugged BTD ball diverter has been specifically designed to converge or diverge abrasive systems in pneumatic conveying systems. When diverting the product itself provides the wear surface. The diverter is also suitable for systems having relatively high pressures and temperatures, e.g. thermoelectric power stations (coal and fuel oil ash), incinerators, foundries and cement, glass, ceramic, limestone and gypsum factories. The FDV flap diverter and FVV fill and vent valve complete the diverter range. Both valves are available with flange or pipe fittings.
For more information contact DMN UK Ltd on 01249 818 400 or visit
www.dmnwestinghouse.co.uk
www.solidsandbulk.co.uk
March 2011 • Solids & Bulk Handling 9
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