Classic Felt Replacement Cartridge with Gasket, for #99

F35-24 Westwood Engineering Oil Filter Cartridge

The Westwood Engineering F35-24 Oil Filter Cartridge is a high-performance, professional-grade replacement element designed for use in standard fuel oil filtration systems. Constructed from high-density classic felt in a stacked-segment configuration, this filter element provides consistent particulate removal and flow stability. Engineered for use by professional technicians, the F35-24 ensures reliable filtration performance across a range of burner and oil transfer applications.

Technical Specifications

• Manufacturer: Westwood Engineering
• Model Number: F35-24
• Type: Oil Filter Cartridge – Stacked Segment Felt Element
• Material: Classic Felt (High-Density, Multi-Layer Construction)
• Configuration: Stacked Segment Design for Increased Surface Area
• Micron Rating: Nominal 10–15 µm (typical for fuel filtration)
• Operating Media: No. 1 and No. 2 Fuel Oil, Diesel, and Light Oils
• Operating Temperature Range: Ambient to 250°F (121°C)
• Flow Direction: Outside-to-In Filtration
• Seal Type: Compression Fit with Retainer Assembly
• Compatible Filter Models:
  • General Model 2A-700A
  • Unifilter Model 99
  • Westwood Models F30, F32, F35, F65, F70
  • Sid Harvey (Mitco) Models 265, 265F

Professional Notes

The Westwood F35-24 filter cartridge is designed for technicians servicing oil heating and burner systems that utilize standard filter housings. The stacked-segment felt design provides high contaminant retention capacity, maintaining clean fuel delivery and extending component life. Replacement should be completed during scheduled maintenance or when pressure drop across the filter exceeds acceptable limits. Proper gasket inspection and seating are essential to ensure leak-free performance upon reassembly.

Summary

The Westwood Engineering F35-24 Oil Filter Cartridge is a classic felt, stacked-segment element developed for professional fuel oil filtration systems. Compatible with General, Unifilter, Westwood, and Sid Harvey models, it provides dependable particulate removal, stable flow performance, and long service life in heating and burner system maintenance applications.