DFN Low Pressure Duplex Filter Assembly

Designed to maintain continuous filtration, even throughout element servicing, the DFN series filter assemblies provide a compact and user-friendly 4-way, 2 position housing completely sealed from the atmosphere. Remove particulate and water from a variety of fluids including hydrogen seal, oil, turbine lube oil, bearing lube oil, and FD-ID-PA fan lube.

Ideal for systems where filters must be serviced without system interruption such as hydraulic, gearbox, wind turbine, boiler feed pump, mechanical/electro hydraulic control, and servo systems.

Max Operating Pressure: 888 psi (61.2 bar)

 

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Operating Temperature 

Fluid Temperature

30°F to 225°F

(0°C to 105°C)

Ambient Temperature

-4°F to 140°F

(-20C to 60C)

Operating Pressure

DFN19

888 psi (61.2 bar) max

DFN39

350 psi (24.1 bar) max

ΔP Indicator Trigger

32 psid (2.21 bard)

Element Collapse Rating

Normal Collapse (Collapse Option N)

450 psid (31.0 bard)

 High Collapse (Collapse Option H)

3000 psid (206.8 bard)

materials of Construction

Head

Aluminum

Bowl

Aluminum

Interior Coating

Anodized
Media Description

M

G8 Dualglass, our latest generation of DFE rated, high performance glass media for all hydraulic & lubrication fluids. βx[C] ≥ 1000 (βx ≥ 200)

A

G8 Dualglass high performance media combined with water removal scrim. βx[C] ≥ 1000 (βx ≥ 200)

W

Stainless steel wire mesh media βx[C] ≥ 2 (βx ≥ 2)

Fluid Compatibility

Biodegradable and mineral based fluids. For high water based of specified synthetics, consult factory.

Replacement Elements
DFN replacement elements
ΔP Factor
DFN ΔP factor chart
Max flow rates and ΔP factors assume υ = 150 SUS, 32 cSt. See filter assembly sizing guideline for viscosity conversion formula on page 22 for viscosity change.
Filter Sizing Chart
DFN filter sizing chart
Max flow rates and ΔP factors assume υ = 150 SUS, 32 cSt. See filter assembly sizing guideline for viscosity conversion formula on page 22 for viscosity change.