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Poly-Fine® XLD Filter Cartridges for Digital Ink Formulation

Overview
Specifications
Performance
Ordering Information
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Optimized Hybrid of Depth and
Pleated Filtration Technologies

The Poly-Fine® XLD filter is an innovative synthesis of depth and pleated filtration technologies. This product combines the high flow capacity and low pressure loss of pleated filters, with the gel retention capability and long life of a depth filter.

The Poly-Fine XLD filter is an excellent choice for a wide range of digital printing inks.

The construction of the Poly-Fine XLD filter has been tailored to meet the needs of digital ink formulation and the all-polypropylene construction is compatible with many of the current ink jet ink chemistries. The multi-layer media structure has been developed with fine dispersion classification and gel retention in mind.

Features and Benefits

  • Poly-Fine XLD filters are pleated-depth filters with all-polypropylene construction.
  • Four nominal filter lengths are available: 10''/254mm, 20''/508mm, 30''/762mm, and 40''/1016mm.
  • Poly-Fine XLD filters for digital ink filtration are available in key removal ratings from 1.0 to 10µm absolute (coarser grades are available for other applications).
Features Advantages Benefits
Optimized media structure Improved dispersion classification performance Effectively removes oversized material with minimum removal of colorant
Absolute rated filter media Consistent, repeatable filtration performance Dependable ink quality on every batch
Thick media structure Excellent gel retention Increased ink cleanliness and printer performance
All-polypropylene construction Excellent compatibility with most digital ink chemistries Ink chemists need to approve only one material for new ink formulations
High void volume media structure Significant porosity to capture and retain contaminant Long service life and low filter cost per gallon
Robust construction for higher viscosity fluids Filter pleats will resist pleat deformation when filtering higher viscosity digital inks Even pleat flow throughout service life for maximum media utilization and long service life.
Cartridges are free of surfactants, binders, resins and adhesives Very low extractables in most ink systems No impact on critical ink properties

Micrograph of Poly-Fine XLD Series filter media (magnification x 500)

Outer Pre-Filtration Layer 1

Pre-Filtration Layer 2

Pre-Filtration Layer 3

Inner Final Filtration Layer (Constant Pore Size)

Specifications

Materials of Construction

Filter Media Polypropylene
Core, Cage and Endcaps Polypropylene
Gaskets/O-Rings Ethylene Propylene (EPDM)(1)

(1)Please contact Pall for other available materials

Maximum Operating Temperature 65 °C/150 °F
Maximum Differential Pressure 280 kPa @ 65 °C / 40 psid @ 150 °F
480 kPa @ 20 °C / 70 psid @ 68 °F

Performance

Typical Liquid Flow Rate versus Differential Pressure3

3 Flow rate is per 10"/254mm cartridge. For liquids with viscosities differing from water, multiply the pressure drop by the viscosity in centipoise (cP)

Ordering Information / Part Numbers

This is a guide to part number structure only. For availability of specific options, please consult Pall.
XLD [Table 1] - [Table 2][Table 3][Table 4] - [Table 5][Table 6]

Table 1

Code Removal Rating
1 1.0μm
1.5 1.5μm
3 3.0μm
4.5 4.5μm
10 10μm

Table 2

Code Cartridge Length
10 10 in.
20 20 in.
30 30 in.
40 40 in.

Table 3

Code Hardware
U Polypropylene

Table 4

Code Gasket/O-ring Material
E EPDM (standard)
V 'Viton' A
N Buna N

Table 5

Code End Configuration
No Code Double-Open End (DOE)
M3 SOE, flat closed end, external 222 o-rings
M7 SOE, fin end, external 226 o-rings
M8 SOE, fin end, external 222 o-rings

Table 6

Code Special Ink Jet Specification
147 Preflushed cartridge with optimized media

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