Heavy-Duty Robust Hydraulic Pressure Filter HFM 75/95 - BH4HC

A key safety feature of Ayater's HFM 75/95 filter is the optional BH4HC robust filter element, mandatory for non-bypass valve filters operating at pressures above 20bar. The BH4HC element is engineered with a reinforced structural design, delivering superior pressure resistance and mechanical strength compared to standard elements, preventing element collapse and fluid contamination caused by unfiltered fluid in high-pressure non-bypass systems. This design addresses the critical safety risk of standard element failure in non-bypass applications, ensuring hydraulic system integrity and avoiding costly component damage from unfiltered impurities. For systems with bypass valves, standard Optimicron® (ON) elements (1-20μm) are used, balancing filtration precision and cost-efficiency.

The HFM series adopts a high-performance NBR (Perbunan) sealing system, with all O-rings and profile seal rings made of NBR for excellent oil resistance, temperature resistance and sealing performance, matching the filter's operating temperature range (-30°C to +100°C) and pressure rating. The sealing components cover all critical interfaces (element-spigot, bowl-head, clogging indicator-port), with dedicated back-up rings for the bowl O-ring (67.95x2.62) to prevent extrusion damage under high pressure. For special fluid applications (e.g., HFA/HFC emulsions), FPM seal options (marked V) are available on request, with the seal material tested for compatibility with the target fluid to avoid swelling, hardening or leakage. The sealing system's integrity is further ensured by strict assembly protocols-all sealing surfaces must be wet with clean operating fluid before reassembly to eliminate air gaps and prevent leakage.

Ayater's HFM filter is designed with environmental protection as a core principle, complying with national and international regulations for hydraulic fluid handling and waste disposal. During maintenance, hydraulic fluid must be drained into a suitable sealed container, with no discharge into soil, watercourses or sewer systems to prevent groundwater pollution and ecological damage. Used filter elements (non-cleanable) must be disposed of in accordance with environmental protection regulations, with Ayater providing guidance on compliant disposal methods for different regions. The filter is also compatible with biodegradable hydraulic fluids (VDMA 24568 HETG/HEES/HEPG), reducing the environmental impact of fluid leakage and waste, and supporting sustainable industrial operation. For high-water-content fluids (≥50%), custom filter modifications are available to avoid fluid separation and filtration efficiency loss.

The HFM 75/95 filter's inline design and standard port sizes (G ¾/H, G 1/J) enable seamless integration into most industrial hydraulic pipelines, with minimal modification required for existing systems. The filter housing is fully earthed to meet electrical safety standards, preventing static electricity build-up and discharge risks in flammable fluid applications. To ensure long-term reliability, Ayater recommends using only genuine spare parts and repair kits, as non-genuine parts may not meet technical requirements and lead to filter failure and system damage. Regular maintenance (element replacement, seal inspection, cleanliness checks) is critical, and the filter's performance can be further optimized by matching it with Ayater's hydraulic fluid condition monitoring systems, enabling predictive maintenance and reducing unplanned downtime. The filter's fatigue strength of 10⁶ pressure cycles ensures long service life in high-pressure cyclic operation, making it a cost-effective solution for heavy-duty industrial hydraulic systems.