News

• SINFT
• 2025-05-29 22:32:58

1. Background: Challenges in Phosphate Ester Hydraulic Systems

Phosphate ester-based hydraulic fluids are widely used in applications such as power generation, aerospace, and high-temperature systems due to their fire resistance. However, they also present unique challenges:

• High chemical reactivity demanding strict compatibility with filter media and adhesives

• Low electrical conductivity, prone to static buildup and discharge

• High cleanliness requirements (often NAS 5 or better)

• Common usage in precision control systems, sensitive to pressure drops

Traditional HC2246 filters perform well in mineral oil systems but are not fully optimized for phosphate ester environments.

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2. R&D Objective

Our goal was to develop a fully compatible and performance-enhanced HC2246 replacement filter with:

• Integrated antistatic functionality to prevent electrostatic hazards

• High filtration efficiency (βx(c) ≥ 2000)

• Low initial pressure drop and high flow capability

• Material compatibility with phosphate ester fluids

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3. Technical Solutions

• Functional Filter Media: Conductive polymer-grafted glass fibers for controlled static discharge

• Gradient Pore Design: Multi-layer structure ensures high dirt holding capacity and low flow resistance

• CST Verified: Full-cycle dynamic stability tested under pulsating conditions

• High Weight Media: >150g/m² for extended service life under extreme operating conditions

• Asymmetric Support Mesh: Enhances pleat stability and resists deformation

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4. Results Summary

Parameter	Original HC2246	New Replacement
βx(c) ≥	2000	≥2000
Initial Δp	0.18 bar	0.15 bar
Static Discharge	Yes	None
Material Compatibility	Partial	Full (glass fiber + FKM)
Lifetime	400h	>650h

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5. Conclusion

The development of this HC2246 replacement filter marks a step forward from replacement to upgrade. With enhanced performance, reliability, and safety in phosphate ester applications, we are setting a new benchmark for industrial filter innovation.