SRF Series

Suction / Return Line Tank-Top Filters

Tank-Top Reservoir Filters remove contaminants from hydraulic systems. Zinga filters have the highest levels of dirt-holding capacity. and are manufactured to the exact standards to protect pumps and hydraulic circuits from contamination for per ISO 4406.


  • Flows Up To: 83 GPM (Return) 28 GPM (Suction)
  • Port Sizes: 1 1/4″ & 1 1/2″ NPTF, 1 5/8″ – 12 UN (SAE – 20), 1 7/8″ – 12 UN (SAE – 24), 1″ & 1 1/4″ BSP
  • Pressure: 100 PSI Max Operating
  • Temperature: Up to 250°F Operating
  • Application: Petroleum-based fluids; consult factory for synthetic fluids


  • Protects hydraulic system
  • Easy to install and use
  • Helps keep your system in compliance with ISO 4406 standards
  • Highest levels of dirt-holding capacity

Performance Chart

Average Pressure Drop Through Clean Filter Assembly With 150 SUS Oil At 105 ̊ F

Design Features

  • Radial seal grommet used in SRE Series filter elements.
  • Filter housing mounting bolt pattern matches Zinga RF, TR, and TS series as well as Schroeder ST, RT, and LRT series housings.
  • SRF series housings are fully compatible with Schroeder K series elements.

Diagrams and Dimensions


Bottom Flow Filter Application

Bottom Port Options

Zinga Filter Media Types

Z-Glass Media

Multi-Layered, non-woven glass media that provides the highest levels of depth filtration efficiency and capacity. Higher capacity means longer service life. Coupled with a steel support mesh, Z-Glass can withstand higher differential pressures.

Cellulose Media

Traditional paper based media that provides a nominal level of depth filtration and capacity. Used with petroleum-based fluids only. Some grades of cellulose include a layered glass fiber substrate to provide more efficiency.

AquaZorb Media

Water absorbing cellulose based media designed specifically to absorb and retain free water from petroleum-based fluids. Commonly used in offline systems, AquaZorb will operate until it is fully saturated and ultimately curtail flow through the media. A system by-pass valve and service gauge is recommended when using AquaZorb.

Stainless Steel Mesh

Woven in a variety of precision patterns, stainless steel mesh provides a basic surface type filtration with very low differential pressure. Applications include pump protection and “last chance” valve protection. Stainless steel mesh can be serviced by ultrasonic cleaning. (30: 560µ, 60: 280µ, 100: 141µ, 200:75µ, 200×1400: 10µ)

Compatible Filter Elements

SRE & ZSRE Series Filter Elements
for Zinga SRF & TS Housings, or as direct interchange for Schroeder “K” series elements