Dollinger LL-142 Liquid Filters

The Dollinger LL-142 Liquid Filters are designed to remove final traces of dirt, pipe scale and other solid contaminants from process liquids.

Unlike conventional multiple-cartridge filters, the Dollinger Element Design Concept maximizes 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 customized filter designs and capacities to suit the particular process / application demands of the customer.

Housing and Design Construction
As standard, the Dollinger LL-142 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 – Canadian and European. 

Materials of Construction
The standard materials of construction of the Dollinger LL-142 filter are carbon steel or stainless steel. Where appropriate, a cost-effective option incorporates a carbon steel housing with stainless steel downstream of the filter element.

Special requirements for low temperature applications can also be accommodated.

Filter Element 
The Dollinger LL-142 Filter incorporates the efficient radial fin element design which provides the largest filtration area for given element size. This increases dirt holding capacity, minimizes pressure drop and results in an extended service life.

The filter media support structure utilizes carbon steel or alternatively, stainless steel. The standard element design ensures its integrity up to a differential pressure of 50 psid. Special designs are available for applications which demand higher differential capabilities.

Filter Media 
Dollinger offers an extensive range of synthetic and natural fiber filter media suitable for use with most process liquids. In addition, stainless steel mesh media can be incorporated in 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 contaminants. 

Inter-Changeability 
In the even of changing process conditions following installations, it is possible to interchange elements to vary the degree of filtration.