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938931Q Hydraulic Filter Element Replacement for Parker | High-Efficiency Microglass
Technical
1.Definition: The 938931Q Hydraulic Filter is a high-pressure, inorganic microglass-based replacement element designed for critical hydraulic systems. It functions as a precision barrier to eliminate microscopic particulates that cause siltation in servovalves and erratic performance in axial piston pumps.
Primary Filter Media: Multi-layered Borosilicate Microglass.
Micron Rating: 10 Micron Absolute .
System Integrity: Engineered to maintain isochronous operation under varying flow conditions.
2. Failure Analysis: Solving the "Chain Reaction of Wear"
Most hydraulic failures are invisible until the system shuts down. Standard cellulose filters often suffer from media migration or "unloading" during cold starts.
The Problem: Particulates between 5-15$\mu$m (the size of human hair) enter the clearance tolerances of pumps, causing internal leakage and heat buildup.
Our Solution: The 938931Q utilizes depth filtration technology. By capturing contaminants throughout the full thickness of the microglass media, it prevents the "chain reaction of wear," extending the Mean Time Between Failures (MTBF) for your entire hydraulic circuit.
Comprehensive Technical Specifications
| Engineering Property | Technical Data | Industry Standard |
| OEM Model | 938931Q | Direct Interchange |
| Filtration Efficiency | 99.9% at 10 Micron | ISO 16889 Multi-Pass |
| Collapse Pressure | 10 Bar (145 PSI) | ISO 2941 Tested |
| Seal Compatibility | Fluorocarbon (Viton) | ASTM D1418 |
| Fluid Compatibility | HH, HL, HM, HV, HFD | ISO 2943 |
| Flow Direction | Outside-to-Inside | Optimal Pleat Support |
Cross-Reference And Application
To assist procurement officers in technical verification, the 938931Q is a verified interchange for the following global entities:
Parker: 938931Q
The 938931Q is essential for machinery where precision control is non-negotiable:
Injection Molding Machines: Protecting high-speed proportional valves.
Construction Excavators: Ensuring smooth operation of the main control valve bank.
Industrial Power Units (Hydraulic Packs): Maintaining system pressure in 24/7 manufacturing.
Mobile Material Handling: Vital for telehandlers and reach stackers in port logistics.
The "AYREST" Manufacturing Advantage
As an integrated manufacturer of filters and precision accessories, we offer:
Pleat Optimization: Our 938931Q features higher pleat counts than generic substitutes, resulting in 35% more Dirt Holding Capacity (DHC).
Zinc-Plated End Caps: Superior corrosion resistance compared to painted or raw steel caps.
Epoxy Bonding: High-temperature resin ensures zero bypass even under high-vibration environments.
Customization: We offer private labeling and bespoke micron ratings (1μm, 3μm, 5μm) based on your specific oil analysis.
Preventive Maintenance Guide
When to Replace: Replace the 938931Q when the differential pressure reaches 1.5 - 2.0 Bar or during your scheduled 1,000-hour service.
Installation Tip: Never "pre-fill" the filter with oil before installation; this introduces unfiltered contaminants directly into the "clean side" of the system.
Oil Sampling: If your 938931Q clogs prematurely, it is an early warning sign of pump cavitation or cylinder seal failure. Perform a Patch Test immediately.
FAQ
Q: How does the 938931Q maintain the ISO 4406 cleanliness code?
A: By utilizing inorganic microglass with a high beta ratio, the 938931Q consistently removes particles in the 4μm, 6μm, and 14μm ranges, typically helping systems achieve a 16/14/11 cleanliness code.
Q: Can I use this filter for water-glycol fluids?
A: Yes. The inorganic glass media does not swell or degrade in the presence of water-based hydraulic fluids, unlike traditional paper filters.
Bulk Inquiries: Direct factory pricing for orders over 50 units.
Technical Support: Free Cross-Reference verification for your entire fleet.
Sample Policy: Paid samples available for performance validation.
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