Overview
The Schroeder KZ3 hydraulic filter cartridge is engineered for dependable performance in demanding hydraulic applications. This 9-inch cartridge features Z-Media synthetic microglass with a 3-micron absolute rating and outer dimensions of 3.9″ OD and 1.625″ ID. The element is suitable for hydraulic oils, petroleum-based fluids, high-water-content fluids, invert emulsions, and water-glycol applications, making it a versatile choice for diverse industrial hydraulic systems.
Key Features
- Excellement Z-media provides maximum dirt-holding capacity, superior particle capture, excellent beta stability, minimum pressure drop, and high flow rate
- Multi-layer construction evolved from laboratory testing; each successive layer performs a distinct function—outermost layer maintains integrity, spun-bonded scrim provides coarse filtration, and fine filtering media layers entrap dirt particles
- Lower pressure drop and improved flow stability for better flow characteristics
- Buna N seals with steel end cap and 150 PSID collapse rating
- Outside-in flow direction for efficient contaminant removal
Technical Specifications
- Cartridge Height: 9.25 inches (overall)
- OD (Top/Bottom): 3.85 inches
- ID (Top/Bottom): 1.61 inches
- Micron Rating: 3 micron (absolute)
- Media Type: Synthetic microglass (Excellement Z-media)
- Seal Material: Buna N
- Collapse Pressure: 145 PSID
- Operating Temperature Range: –13°F to 250°F
- Flow Direction: Outside-in
- Beta Ratio: 200/3 micron
- National Stock Number: 4330-01-346-4729
Typical Applications
The KZ3 is widely used in industrial hydraulic systems requiring fine filtration and extended element life. Applications include manufacturing equipment, mobile hydraulics, industrial presses, injection molding machines, and other systems where particle control directly impacts component longevity and system uptime. The compact 9-inch cartridge fits standard spin-on and bowl-type filter housings commonly found in legacy and modern equipment.
Compatibility & Replacements
Compatible With
- Standard cartridge filter housings with 9-inch element length
- Spin-on and bowl-type hydraulic filter assemblies
- Hydraulic systems operating on mineral oils and petroleum-based fluids
- High-water-content fluids and invert emulsions
- Water-glycol and phosphate-ester based hydraulic fluids
Replaces / Drop-In Replacement For
The KZ3 is a direct replacement for comparable 9-inch, 3-micron hydraulic cartridges with matching thread sizes (1.625″ ID, 3.9″ OD). Verify housing compatibility and seal material requirements with your system integrator before ordering.
Works With
- Schroeder filter housings and assemblies
- OEM hydraulic filter bowls (verify specific application)
- Aftermarket cartridge-style filter assemblies
- Industrial hydraulic maintenance programs
