10/6/2015

Greater efficiency along with maintaining the availability of plants are important drivers within the power sector. Therefore, ensuring that all solid particles are removed from the gas stream in power plants is critical, especially for the gas turbines because any small particles could block injectors or even damage the turbine blade.
From its Dollinger brand, SPX provides a wide range of precision-engineered air intakes, fuel gas and fuel oil filtration packages, along with oil exhaust eliminators. The Dollinger series GP-146 high efficiency gas particulate filters are designed to remove final traces of dirt, pipe scale and other solid contaminants from process air and other gases. As well as cleaning the fuel gas stream entering a turbine they can be used in any gas pipework system to prevent damage to instruments or equipment from contaminants such as pipe-scale, dust or particles that may be present in the unfiltered gas.
Unlike conventional multi-candle filters, the Dollinger element design concept maximises the effective filtration area for a given vessel size resulting in lower differential pressure and extended service life. In addition to the standard range of filters, Dollinger is able to offer customised filter designs and capacities to suit the particular process and application demands of the customer. The majority of the filters are constructed in carbon steel or stainless steel. However, they are available in Duplex, Super Duplex and other high quality materials where required. Special requirements for low temperature applications can also be accommodated.
The Dollinger GP-146 filter incorporates the efficient radial fin element design which provides the largest filtration area for a given element size. This increases dirt holding capacity, minimises pressure drop and results in an extended service life. The filter element support structure is constructed from steel suitable for the particular application. Standard element design ensures its integrity up to differential pressures of 3.45 bar and beyond, with special bespoke designs available where required.
Dollinger offers an extensive range of synthetic and natural fibre filter media, suitable for use with most process gases and high temperature applications (e.g. Fibreloc© 99.9% of 3microns at 3710C). In addition, stainless steel mesh media can be incorporated into the existing element design for more demanding applications. In most instances, the Dollinger filter element can be cleaned and re-used many times. This feature is especially beneficial in applications having high levels of contaminant.
As standard, the Dollinger GP-146 filter housing is designed and constructed in accordance with the ASME VIII, Division I Pressure Vessel construction code. In addition, Dollinger can also provide full design services to other pressure vessel codes e.g. BS5500, Stoomwezen, AD Merkblätter, CODAP and AS 1210. Flexibility is also built in so if process conditions change following installation, it is possible to interchange elements to vary the degree of filtration.
In addition to the gas particulate filters, SPX Dollinger offers liquid particulate filters which work in a similar way filtering fluids such as diesel & fuel oils, removing solid contaminant providing a high level of protection for expensive components in systems like pumps, heat exchangers, etc. Along with air intake filters, which can be offered in the form/combination of Inertial Spin, Panel or Pulse Jet type housings which also filter solid contaminants from the atmospheric air commonly used for compressors, blowers and turbines, where again, the high efficiency levels preventing damage to critical equipment blades.
SPX Dollinger provides global leadership in filtration technology offering off-the-shelf and engineered solutions to the toughest applications. Many of its innovations were the result of serving an ever-widening range of industries with contaminant removal solutions for air intake filters, compressed air/gas particulate and coalescing filters, oil mist elimination and liquid process filtration.