NAGASE have a polymer filter for high viscosity fluids

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Polymer filter

Leaf Disk Filters

Aupports high viscosity and large flow quantity

The leaf disk filter offers the large filtration area even in a limited capacity ,the high mechanical strength and the good rheological properties.

Superior cleaning characteristics

NAGASE provides not only a conventional wire mesh retainer supported leaf disk filter but also our original TP (Twisted Plate) retainer supported leaf disk filter, which can reduce the initial pressure drop, extend the on-stream life and achieve the easy cleaning, in a variety of sizes, hub designs, filtration efficiencies and types of porous metal filter media to meet every requirement.

Product specification / filter size

  4inch 5inch 7inch 8inch φ290mm 12inch
OD 111mm 149mm 177mm 222mm 290mm 304mm
ID A 38.1mm 38.1mm 47.6mm 47.6mm 63.5mm 63.5mm
     B 47.6mm 47.6mm 63.5mm 63.5mm 76.2mm 76.2mm
     C       76.2mm 85.2mm 85.2mm
     D         115.5mm 115.5mm
Specifications of Retainer
：　Wire mesh or TP retainer
Filter Medium
：　Sintered metal fiber, Sintered Metal Powder,
　　Sintering wire mesh
Filtration accuracy
：　1~200μ(include development grade)

Hub Designs

TP soft hub Semi-hard hub TP semi-hard hub Hard hub

About TP retainer

The conventional type of leaf disk filter has a wire mesh retainer , which causes high pressure drop for the filter and this leads to problems as polymer stagnation , polymer degradation and gel creation.
To reduce the pressure drop , the TP retainer has been developed .
The TP retainer has the simple structure , made of one piece of stainless steel plate. And its original structure guides the polymer towards the center pole , so that the polymer flows more easily. This helps not only for low pressure drop , but also for long on-stream life . And This , in turn , helps good clean ability

Characteristic of TP retainer

Example of the effect with TP retainer.


A low pressure loss / a longer life effect by TP retainer.

  Conventional type
(Wire mesh retainer) 		Lower pressure drop type
(TP retainer)
 
Pressure Drop Wire mesh retainer has the structure that doesn't lead polymer to inner diameter. Therefore polymer stagnation could happen inside and the pressure drop is also higher. The TP retainer has the structure that leads polymer to the inner side. Therefore it enables polymer to flow more smoothly from outside to inside and the pressure drop is lower.
Filtration The effective filtration area is limited because outside area could not be used due to higher pressure of retainer. The effective filtration area is bigger because polymer can easily penetrate into outside area of filter medium due to lower pressure of retainer.
Cleaning It is tough to clean the space of backside of hub ring because it is too complicated structure. It is more easy to clean even space of hub ring because it is very simple structure of hub design and has more open area in it