925835 937778Q Parker Hydraulic Filter Element Microglass

Product Overview

The 925835, 937778Q, 937397Q, 938075Q, 925023, 932694Q and 937398Q are Parker Hannifin hydraulic oil filter elements featuring Microglass III or high-performance multi-layer glass-fiber media for absolute high-efficiency filtration. Designed for hydraulic systems and air compressor lubrication/hydraulic circuits, they deliver high dirt-holding capacity and stable filtration performance. Fully interchangeable with original Parker elements, they install directly into existing housings without modifications. Every element is validated to ISO standards and undergoes 100% simulated operating condition testing to reliably remove metal particles, wear debris and other contaminants, maintaining oil cleanliness and extending the service life of critical compressor and hydraulic components.

Technical Specifications 

• Models: 925835, 937778Q, 937397Q, 938075Q, 925023, 932694Q, 937398Q
• Filter media: Microglass III or high-performance multi-layer glass fiber
• Filtration rating: Common absolute ratings of 2 μm, 5 μm, 10 μm etc. (typical βx(c) ≥ 200 depending on exact model)
• Collapse pressure: Supports low to medium collapse ratings (commonly approx. 10–20 bar or higher depending on version)
• Seal material: NBR or fluorocarbon (depending on configuration)
• Flow direction: Outside to inside or as per series design
• Operating temperature range: approx. –25…+120 °C (typical)
• Compatible fluids: Mineral hydraulic oils, lubricants, PAO and other compatible media
• Design features: Compatible with Moduflow Plus, 30P, GS and similar series housings; single/double length configurations
• Test standards: Compliant with ISO 2941, ISO 2942, ISO 16889 multi-pass and collapse testing

Key Technical Advantages

• Microglass III high-performance media: Multi-layer glass-fiber construction provides increased surface area and superior dirt-holding capacity while maintaining low initial differential pressure and high beta stability, significantly extending element change intervals.
• One-piece reliable design: Patented single-piece construction reduces loose parts, improves fatigue resistance and simplifies installation for continuous operation in compressors and hydraulic systems.
• Full interchangeability and precise fit: Manufactured to exact original Parker dimensions and interfaces, ensuring perfect compatibility with existing housings and enabling quick, modification-free replacement.
• Rigorous quality control: Validated to multiple ISO standards with simulated duty-cycle verification, guaranteeing long-term reliability under vibration, temperature fluctuations and high contamination loads.

Application Areas

Air compressor hydraulic and lubrication systems, construction machinery, injection molding machines, die-casting machines, metallurgical equipment, machine tools, test stands, and industrial hydraulic power units requiring pressure or return-line filtration. Especially suitable for OEM equipment and retrofit projects demanding high oil cleanliness and rapid element replacement.

Expert Maintenance Tips

Depressurize the system and thoroughly clean the filter housing interior before replacement to prevent secondary contamination. Ensure seals are intact and correctly seated, then tighten to the specified torque. Replace according to differential pressure indicators or contamination monitoring; do not exceed recommended pressure drop. Use appropriate-rated elements for initial flushing of new or overhauled systems. Regularly inspect seals and housing condition for corrosion. Always use compatible hydraulic fluid and maintain temperature and viscosity within recommended ranges to maximize element life and filtration efficiency.

Hydraulic Oil Filter Elements (Core Series)

• 937393Q
• 937394Q
• 937395Q
• 937396Q
• 937397Q
• 937398Q
• 937399Q
• 937400Q
• 937401Q
• 937402Q
• 937403Q
• 937404Q
• 937405Q
• 937406Q
• 937407Q
• 937408Q
• 933068Q
• 932629Q
• 933153Q
• 933155Q
• 933156Q
• 933366Q
• 933367Q
• 933368Q
• 933809Q
• 933810Q
• 933811Q
• 932686Q
• 932687Q
• 932688Q
• 932689Q
• 932690Q
• 932691Q
• 932692Q
• 932693Q
• 932694Q
• 932695Q
• 932696Q
• 932697Q
• 933116Q
• 933117Q
• 933118Q
• 933119Q
• 933193Q
• 933194Q
• 933195Q
• 933196Q
• 933202Q
• 933203Q
• 933204Q
• 933205Q
• 933210Q
• 933211Q
• 933212Q
• 933213Q
• 933218Q
• 933219Q
• 933220Q
• 933467Q
• 933468Q
• 933486Q
• 933487Q
• 933488Q
• 933489Q
• 933576Q
• 933577Q
• 933578Q
• 933579Q
• 933580Q
• 933581Q
• 933582Q
• 933583Q
• 933742Q
• 933812Q
• 933814Q
• 933816Q
• 933818Q
• 934121Q
• 934122Q
• 934123Q
• 934124Q
• 934194Q
• 934264Q
• 934265Q
• 934308Q
• 937836Q
• 937839Q
• 937870Q
• 937736Q
• 937769Q
• 932610Q
• 932611Q
• 932612Q
• 932616Q
• 932617Q
• 932618Q
• 932622Q
• 932623Q
• 932624Q
• 932630Q
• 932631Q
• 932669Q
• 932670Q
• 937778Q
• 938075Q

Air Compressor Spare Parts (Non-Filter Elements)

• RK22788
• FF22610
• KN40404
• RK16017
• RK22609
• RK22682
• FTAE1A20Q
• G04272
• PR3152
• 935140
• 935141
• 935142
• 935143
• 935144
• 935145
• 935146
• 935147
• 935148
• 935149
• 935150
• 935151
• 935152
• 935153
• 935154
• 935155
• 935156
• 935157
• 934476
• 930091
• 932627
• 934200
• 934234
• 934236
• 940803
• 940802
• 940974Q
• 940972
• 940973
• 940736
• 944097Q
• 944098Q
• 944012Q
• 944013Q
• 944014Q
• 944015Q
• 944016Q
• 944017Q
• 944022Q
• 944023Q
• 944024Q
• 944025Q
• 943999Q
• 940802Q
• 924732
• 921999
• 925023
• 924448
• 924450
• 924455
• 924452Q
• 924453Q
• 926541
• 924451
• 982131
• 925835