DFFH & DFFHM Series
Reverse Flow & Bi-Directional Filters
6000 PSI • Up to 100 GPM

Hydac_DFFH_DFFHM Series Filters

Features

  • DFFH Reverse Flow models filter fluid in the forward direction and bypass the filter element when the flow direction is reversed.
  • DFFHM Bi-Directional model allows fluid filtering in both directions. There is a filter element for both directions.
  • Inlet/outlet port options include SAE 4-bolt flange code 62, or SAE ports (DFFHM flange only) to allow easy installation without costly adapters.
  • O-ring seals are used to provide positive, reliable sealing. Choice of O-ring materials (Nitrile, Fluoroelastomer, and EPR) provide compatibility with petroleum oils, synthetic fluids, water-glycols, oil/water emulsions, and high water base fluids.

Technical Details

Mounting Method DFFH: 4 Mounting Holes
DFFHM: 8 Mounting Holes
Port Connection
DFFH 160/240/280
DFFH 330/660/1320
DFFHM 160/240/280
DFFHM 330/660/1320
SAE-20, 1-1/4˝ SAE Flange Code 62
SAE-24, 2˝ SAE Flange Code 62
1-1/4˝ SAE Flange Code 62
2˝ SAE Flange Code 62
Flow Direction Inlet: Side                         Outlet: Side
Construction Materials
Head
Bowl
Ductile Iron
Steel
Flow Capacity
160
240
280
330
660
42 gpm   (160 lpm)
63 gpm   (240 lpm)
74 gpm   (280 lpm)
87 gpm   (330 lpm)
100 gpm (660 lpm)
Housing Pressure Rating
Maximum Operating Pressure
Proof Pressure
Fatigue Pressure
Burst Pressure
6000 psi (420 bar)
9000 psi (610 bar)
6000 psi (420 bar)
Contact HYDAC Office
Element Collapse Pressure Rating
BH/HC, V
BN/HC, W/HC
3000 psid (207 bar)
250 psid  (17 bar)
Fluid Temperature Range -22° to 250°F (-30° to 121°C)
Fluid Compatability
Compatible with all petroleum oils and synthetic fluids rated for use with Fluoroelastomer or Ethylene Propylene seals. Contact HYDAC for information on special housing and element constructions available for use with water glycols, oil/water emulsions, and HWBF.
Indicator Trip Pressure
ΔP = 29 psid (2 bar) - 10% (Optional)
ΔP = 72 psid (5 bar) - 10% (Standard)
Bypass Valve Cracking Pressure
ΔP = 43 psid (3 bar) + 10% (Optional)
ΔP = 87 psid (6 bar) + 10% (Standard)

 

Available in: Alabama, Arizona, Arkansas, N.W. Florida, S. Idaho, Kansas, Louisiana, Mississippi, W. Missouri, Montana, Nevada, New Mexico, W. North Dakota, Oklahoma, W. South Dakota, Texas, Utah and Wyoming