SFE Series
In-Tank Suction Strainer Element


HYDAC Suction Strainer Elements are designed for installation into suction lines of pumps. Extra caution should be taken to ensure that the suction elements are always mounted below the minimum oil level of the reservoir.

The suction strainer elements can be supplied with a bypass valve to reduce high pressure drops caused by contaminated elements or high viscosity fluids during cold starting. The bypass valve opens at 3 psi. for best results, suction strainer elements should be sized for clean element pressure drops of no higher than 0.5 to 0.7 psi.

HYDAC Suction Strainer Elements are manufactured using stainless steel wire screen media, plastic nut cap, and plated steel end cap and support tube.

Suction strainer elements are only intended to protect hydraulic pumps against catastrophic failure caused by coarse contaminant.

Suction strainer elements should be inspected and cleaned regularly.

Suction strainer elements should not be used as the only filtration elements in a hydraulic system. Pressure filters and return line filters, with reasonable dirt holding capacity, must be installed to provide protection against component damage caused by fine contaminants.

Cleaning Procedure

Remove external build-up of contaminant with cleaning fluid in separate tank.

Flush element with clean solvent and blow through wire screen media with air.

Hydraulic Data

Pressure Drop vs. Flow:

  • Pressure drop will be < 2 psi when strainers are used within the recommended flow range, and with a standard hydraulic fluid with a viscosity of 141 SSU and specific gravity of 0.86.


  • 15° to 180°F (59° to 176°C)
Size Nominal Flow
Media Area
(Sq. Inches)
SFE 11 3 1.33 2.62 3/8 3
SFE 15 5 1.95 4.19 1/2 16
SFE 25 8 2.67 3.55 3/4 50
SFE 50 10 2.67 5.25 1 90
SFE 80 20 3.39 6.62 1-1/4 135
SFE 100 30 3.39 8.76 1-1/2 195
SFE 180 50 4.03 9.88 2 230
SFE 280 75 5.19 10.25 2-1/2 325
SFE 380 100 5.19 11.53 3 410