DFH High Pressure Duplex Filter Assemblies - Duplex Filter Housings & Assemblies - Hydraulic & Lubricating Filtration Systems

Hydraulic & Lubricating / Filtration Systems

DFH High Pressure
Duplex Filter Assemblies

Donaldson Hy-Pro duplex filter assemblies for high-pressure hydraulic and lube oil systems where service can't interrupt operation. Trigger-actuated valve enables seamless changeover at pressures up to 3,600 psi.

DFH High Pressure Duplex Assembly

Product Overview

DFH duplex filter assemblies eliminate the downtime trade-off in critical fluid systems. With a squeeze of the trigger and a turn of the wrist, a fresh element comes online while the used element valves out of service, all without stopping flow. Internal equalization and external vent ports automatically purge air from the standby housing, preventing the air-induction failures that plague lesser duplex designs.

Trigger-actuated changeover for service without stopping flow
Two series: DFH19 (3,600 psi) and DFH39 (3,000 psi)
Internal equalization and external vent ports prevent air induction
DFE-rated G8 Dualglass media with β3[C] ≥ 4000 efficiency
Optional water-removal media for combined particulate and water capture
Cast steel head and bowl construction
Optional bypass valve and ΔP indicator (visual or electric switch)
Compatible with HP19 and HP39 replacement elements

DFH19 vs DFH39

DFH19

3,600 psi max, 25 gpm max. Higher pressure rating for hydraulic and servo systems with lower flow rates.

DFH39

3,000 psi max, 70 gpm max. Higher flow rating for turbine lube, boiler feed pump, and bearing lube oil systems.

Specifications

Max Pressure (DFH19)

3,600 psi (248 bar)

Max Pressure (DFH39)

3,000 psi (207 bar)

Max Flow (DFH19)

25 gpm (95 lpm)

Max Flow (DFH39)

70 gpm (265 lpm)

Filtration

β3[C] ≥ 4000

ΔP Indicator Trigger

73 psid (5 bar)

Fluid Temperature

30°F to 225°F

Connections

Code 61 Flange

Media Options

G8 Dualglass (M) Dualglass + Water (A) Stainless Mesh (W)

Typical Applications

Turbine lube oil systems
Hydrogen seal oil and bearing lube oil
Boiler feed pump systems
Mechanical and electro-hydraulic control systems
Wind turbine and fuel handling systems
Hydraulic, gearbox, and servo systems requiring continuous service

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