The Solberg Model 485P Replacement Air Filter Element (Polyester Element with Pre-filter, 99+% Removal Rate to 5 Microns), engineered and manufactured by Solberg Manufacturing, Inc. in Itasca, Illinois, USA, is an industry-benchmark high-volume air intake filtration cartridge designed for demanding continuous-duty air compression and blower machinery.

Critical Role of Intake Air Filtration for Blowers & Compressors:
In municipal wastewater treatment plants, cement distribution terminals, and chemical processing facilities, heavy-duty blowers and compressors ingest thousands of cubic meters of ambient air per hour. Atmospheric dust, abrasive grit, and ambient moisture, if unmitigated, cause severe premature rotor scouring, impinge upon precision screw tolerances, contaminate lubrication oil, and blind fine-bubble aeration diffusers. The Solberg 485P provides reliable 99+% particulate retention at 5 microns while maintaining exceptionally low flow restriction across a high-throughput 4705 SCFM airflow rating.

Model Code Breakdown & Configuration (Solberg 485P):
- 485: Solberg's standardized dimensional envelope: 19.62" Outer Diameter (~498 mm), 14.0" Inner Diameter (~356 mm), and 21.5" Overall Height (~546 mm), engineered to deliver up to 4705 SCFM (~8,000 m³/h) of clean air.
- P: Suffix designating premium industrial-grade needle-felt Polyester media complete with an external Pre-filter wrap:
  + Outer Pre-Filter Blanket: Wraps around the outer pleated diameter to capture coarse sand, fiber airborne lint, and large dust particles before they enter the primary pleat pack. This dual-stage design increases overall dust loading capacity by 40% to 50%, significantly extending operational intervals between maintenance cycles.
  + Primary Pleated Polyester Pack: Deeply pleated needle-felt polyester fabric offering 71.7 to 75 ft² (~7.0 m²) of expanded surface area, delivering superior tear strength and structural resistance to ambient moisture.

Key Engineering Features & Operational Advantages:
- Washable & Reusable Filter Media: Unlike traditional paper filter cartridges that suffer irreversible structural degradation when exposed to high ambient humidity or water droplets, Solberg’s polyester element can be periodically serviced by blowing off with low-pressure compressed air, vacuuming, or thoroughly washing in warm soapy water. Once dried, it can be re-installed, drastically reducing ongoing operational consumables expenditure.
- Dual-Sided Wire Mesh & Expanded Metal Core Reinforcement: The pleated media is supported on both sides by epoxy-coated steel wire mesh and centered over a heavy-duty expanded metal structural core. This rigid design prevents pleat collapse under high differential pressure (ΔP) or vacuum surge conditions.
- Heavy-Duty Galvanized Endcaps with Neoprene Gaskets (GN Style): Features corrosion-resistant galvanized stamped metal endcaps bonded with industrial adhesive and fitted with resilient neoprene blend gaskets on the open rims. This guarantees a leak-tight seal against the filter housing seats, preventing unfiltered bypass air.
- Wide Thermal Operating Span: Built for continuous operation across an ambient temperature range from -15°C up to +104°C (-26°F to +220°F), easily handling harsh outdoor climatic conditions, hot engine rooms, and oily intake air environments.

Target Industrial Sectors & Applications:
- Municipal & Industrial Wastewater Treatment: High-flow intake air filtration on aeration blowers supplying biological aeration basins and aerobic digesters.
- Pneumatic Bulk Material Handling: Clean air delivery for pneumatic dilute and dense phase conveying of cement, flour, fly ash, carbon black, and plastic compounding pellets.
- Power Generation & Turbomachinery: Intake filtration for large auxiliary compressors, diesel generators, and stationary combustion turbines.
- Chemical, Petrochemical & Plastics: Protection for central process vacuum pumps, nitrogen boost blowers, and air separation units.

• Manufacturer: Solberg (Solberg Manufacturing, Inc.)
• Country of Origin: 100% USA (Made in USA)
• Product Line: Pleated Air Filter Replacement Elements
• Model / Order Code: 485P (BOM Number: 485P / SKU: 22275)
• Media Formulation: High-durability needle-felt industrial polyester fabric
• Pre-Filter Configuration: Factory-installed outer pre-filter wrap (provides 40 - 50% extra dust loading capacity)
• Particle Retention Rating: 99+% particulate removal efficiency down to 5.0 microns (5 µm)
• Rated Volumetric Airflow: 4705 SCFM (~8,000 m³/h)
• Total Active Surface Area: 71.7 to 75 ft² (approx. 6.7 to 7.0 m²)
• Physical Element Dimensions:
  - Overall Height: 21.5 inches (~546 mm / 21.45")
  - Outer Diameter (OD): 19.62 inches (~498 mm / 19.63")
  - Inner Diameter (ID): 14.0 inches (~356 mm)
• Endcap Construction: Galvanized stamped metal open endcaps (GN Style)
• Gasket Sealing: Pre-bonded heavy-duty neoprene blended compression gaskets
• Structural Core Reinforcement: Heavy-gauge expanded metal center core with epoxy-coated wire backing on both cloth sides
• Reusability: Washable in warm soapy water, vacuum cleanable, or cleanable with low-pressure air blow-off
• Recommended Replacement Differential Pressure: 15 to 20 inches of water column (15 - 20" H2O / ~380 - 500 mm WC) over initial clean ΔP
• Permissible Continuous Operating Temperature: -15°C to +104°C (-26°F to +220°F)
• Shipping Weight: Approx. 53 lbs (~24.0 kg)
• Compatible Solberg Filter Housings: Solberg F-485, FS-485, and C-485 filter silencer and canister series
• Quality & Standards Compliance: Conforms to American industrial filtration standards, ISO 9001 certified manufacturing.