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- Ingersoll Rand
- 39903265
- Air Filter Element
- USA
- 380 × 205 × 375 mm
- 3.9 kg
- Xiamen, China
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Product Overview
The Ingersoll Rand 39903265 is an air filter element used in Ingersoll Rand Sierra rotary screw air compressor systems. It removes airborne dust and solid particles from incoming air before the air reaches the compressor airend.
In a rotary screw compressor, the quality of inlet air directly affects the condition of the compression components. Dust entering the airend can accumulate on internal surfaces, contribute to rotor wear, and introduce contaminants into the compressor’s oil circuit. The 39903265 serves as the first filtration barrier against these contaminants.
This element is associated with Sierra compressor packages, including the Sierra SL, SM, and SH 200–300 models, as well as L, H, and HH 250–400 packages. In these installations, incoming air passes through the inlet filter assembly before entering the compression stage. The filter element captures airborne particles while allowing the required airflow to continue toward the airend.
The filter becomes particularly important in industrial environments where compressors operate continuously and are exposed to dust generated by production activities, material handling, and general plant operations. A restricted or damaged element can affect inlet airflow, increasing the pressure drop across the filter and potentially reducing compressor performance.
For maintenance engineers, the 39903265 should be treated as part of the compressor’s regular intake-air maintenance program. Its condition affects both the cleanliness of incoming air and the workload placed on the compressor during operation.
The filter element is a replaceable component within the inlet filter assembly. The housing, cover, brackets, and clamps serve separate mechanical functions and should be inspected when the element is serviced.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Ingersoll Rand |
| Model | 39903265 |
| Product Type | Sierra Air Compressor Air Filter Element |
| Product Category | Compressor Intake Filter |
| Application | Sierra Rotary Screw Air Compressors |
| Filtration Function | Incoming Air Filtration |
| Installation Position | Compressor Air Inlet Filter Assembly |
| Compatible Equipment | Sierra SL, SM, SH 200–300; L, H, HH 250–400 |
| Dimensions | 380 × 205 × 375 mm |
| Weight | 3.9 kg |
Product Features
- Intake Air Filtration: Captures airborne dust and solid contaminants before air enters the compressor airend.
- Airend Protection: Helps reduce the entry of abrasive particles that can contribute to rotor and internal component wear.
- Sierra Series Application: Associated with specified Sierra compressor packages in the 200–400 frame range.
- Replaceable Filter Element: Allows routine intake filtration maintenance without replacing the complete filter housing.
- Airflow Management: Maintains the intended filtration path while allowing incoming air to reach the compression stage.
- Contamination Control: Helps limit dust accumulation in the compressor’s internal air and oil systems.
- Maintenance Accessibility: Can be serviced as an individual element within the inlet filter assembly.
- Industrial Duty Application: Suitable for compressor installations operating in manufacturing and process environments.
- Dedicated Part Identification: The 39903265 part number identifies the specific air filter element used in the corresponding compressor configurations.
Product Working Principle
The Ingersoll Rand 39903265 operates through mechanical filtration at the compressor air intake.
Before compression begins, atmospheric air enters the compressor through the inlet filter assembly. The air passes through the filter media, where suspended dust and other solid particles are retained. The filtered air then continues toward the airend.
The basic airflow arrangement is:
Atmospheric Air → Inlet Filter Housing → 39903265 Filter Element → Cleaned Intake Air → Compressor Airend
During operation, the filter media captures contaminants carried by the incoming air. As particles accumulate, the element gradually becomes more loaded, which can increase resistance to airflow.
Two conditions are particularly relevant to filter performance:
Particle Retention: The filter prevents airborne contaminants from entering the compression chamber, helping protect the rotor surfaces and internal compressor components.
Airflow Restriction: As the filter becomes loaded with dust, the pressure drop across the element may increase. Excessive restriction can reduce the available inlet airflow and affect compressor operating conditions.
The filter therefore needs to maintain an appropriate balance between particle removal and airflow resistance. Regular inspection and replacement help prevent excessive restriction and maintain the intended intake filtration process.
Unlike the ZS1215403 oil filter, which cleans circulating compressor lubricant, the 39903265 treats atmospheric air before it enters the compression stage. These filters protect different parts of the compressor system.
Role in Ingersoll Rand Sierra Compressor System Architecture
The 39903265 is installed in the intake-air section of the Sierra compressor package. It operates upstream of the airend and forms the first filtration stage in the compressor’s airflow path.
Its position is important because contaminants entering through the air intake can affect multiple internal components. Dust may reach the compression chamber, become mixed with lubricant, and contribute to contamination throughout the compressor system.
A simplified airflow arrangement is:
Atmospheric Air → 39903265 Air Filter → Compressor Airend → Air-Oil Separation Assembly → Minimum Pressure Valve → Aftercooler → Compressed Air Outlet
| System Component | Function |
|---|---|
| 39903265 | Filters incoming air before it reaches the airend |
| Inlet Filter Housing | Holds and supports the intake filter element |
| Airend | Compresses incoming air through the rotary screw mechanism |
| Oil Filter | Removes contaminants from circulating compressor lubricant |
| Air-Oil Separator Element | Separates lubricant droplets from compressed air |
| Oil Cooler | Controls the temperature of circulating compressor oil |
| Minimum Pressure Valve | Maintains the required minimum pressure within the compressor |
| Aftercooler | Reduces compressed-air temperature before downstream delivery |
| Intake Restriction Monitoring | Helps identify excessive resistance in the inlet filtration system |
The 39903265 is not interchangeable with an oil filter or air-oil separator. Its function is limited to the incoming-air filtration stage.
Industrial Applications
The 39903265 is relevant to industrial facilities operating compatible Ingersoll Rand Sierra compressor packages, particularly where continuous compressed-air production requires effective intake contamination control.
| Industrial Application | Typical Use |
|---|---|
| Oil and Gas Processing | Filtering atmospheric air entering compressors used for plant utility systems |
| Petrochemical Plants | Protecting compressor airends from dust contamination |
| Chemical Manufacturing | Maintaining clean intake air in continuous-duty compressor installations |
| Automotive Manufacturing | Supporting compressed-air production for pneumatic production equipment |
| Metal Processing | Reducing airborne particle entry into compressors operating near machining areas |
| Cement and Building Materials | Filtering dusty intake air in industrial compressor installations |
| Food and Beverage Manufacturing | Supporting intake filtration in production compressed-air systems |
| Textile Manufacturing | Protecting compressor components in facilities with airborne fiber and dust |
| Packaging Machinery | Maintaining compressor intake filtration for automated production lines |
| General Industrial Manufacturing | Controlling airborne contamination in plant compressed-air systems |
Installation and Maintenance
- Verify the Part Number: Confirm that the replacement element is Ingersoll Rand 39903265 and matches the installed Sierra compressor configuration.
- Check Compressor Compatibility: Review the compressor model and parts documentation before ordering or installing the replacement.
- Shut Down the Compressor: Stop the equipment according to the maintenance procedure and isolate the electrical power supply.
- Allow the System to Stop: Ensure that the compressor has stopped completely and that the intake assembly can be accessed safely.
- Inspect the Filter Housing: Check the housing, cover, brackets, and clamps for damage or accumulated dust.
- Remove the Existing Element: Carefully remove the used filter without allowing accumulated contaminants to enter the intake passage.
- Inspect the Sealing Surfaces: Check the filter seating area and associated seals for damage, contamination, or deformation.
- Prepare the Replacement Element: Inspect the new 39903265 for damaged media, packaging debris, or other visible defects.
- Install the New Filter: Position the replacement element correctly within the inlet filter assembly and ensure that it seats properly.
- Secure the Filter Housing: Reinstall the cover and associated retaining components according to the compressor maintenance procedure.
- Check Intake Conditions: Restart the compressor and inspect the intake system for abnormal noise, air leakage, or restriction indications.
- Record the Replacement: Document the part number, replacement date, compressor operating hours, and filter condition for future maintenance planning.
If inlet restriction remains high after replacing the element, inspect the housing, intake ducting, and downstream airflow path. A new filter cannot correct restrictions caused by damaged ductwork, blocked intake openings, or an incorrectly assembled filter housing.
Compatible System Components
| Component | Function |
|---|---|
| Ingersoll Rand 39903265 | Sierra compressor air filter element |
| Ingersoll Rand ZS1215403 | Rotary screw compressor oil filter |
| Ingersoll Rand ZS1215594 | Air-oil separator element |
| Ingersoll Rand ZS1215595 | Air filter element for a separate compressor application |
| Ingersoll Rand 49032709 | Pre-filter pad |
| Ingersoll Rand 47541573001 | Pre-filter pad |
| Ingersoll Rand 47541572001 | Pre-filter pad |
| Sierra Inlet Filter Housing | Supports and encloses the intake filter element |
| Intake Filter Cover | Secures the filter assembly |
| Intake Filter Clamps | Hold the filter housing components in position |
| Intake Ducting | Directs atmospheric air toward the compressor inlet |
Recommended Related Models
| Model / Product | Product Type | Typical Application |
|---|---|---|
| Ingersoll Rand 39903281 | Air Filter Element | Related Sierra compressor intake filtration |
| Ingersoll Rand ZS1215595 | Air Filter Element | Compressor intake filtration |
| Ingersoll Rand ZS1215403 | Rotary Screw Compressor Oil Filter | Lubricant filtration |
| Ingersoll Rand ZS1215594 | Air-Oil Separator Element | Oil separation from compressed air |
| Ingersoll Rand 49032709 | Pre-Filter Pad | Preliminary air filtration |
| Ingersoll Rand 47541573001 | Pre-Filter Pad | Compressor ventilation and pre-filtration |
Key Advantages
- Removes airborne dust before it reaches the compressor airend.
- Helps reduce contamination-related wear on internal components.
- Supports the intake filtration requirements of compatible Sierra packages.
- Replaceable element for routine compressor servicing.
- Helps maintain the intended airflow through the inlet assembly.
- Reduces the amount of airborne particulate matter entering the compressor.
- Dedicated part number for replacement identification.
Technical FAQs
1. Which Ingersoll Rand compressors use the 39903265 air filter element?
The 39903265 is associated with Sierra SL, SM, and SH 200–300 compressor packages, as well as L, H, and HH 250–400 configurations. The exact equipment model and inlet arrangement should be checked before selecting a replacement.
2. What happens if the 39903265 becomes clogged?
As dust accumulates in the filter media, airflow resistance increases. Excessive restriction can reduce the amount of air entering the airend and affect compressor operating conditions. A filter restriction indication or abnormal inlet pressure drop should be investigated.
3. Is the 39903265 the same as the compressor oil filter?
No. The 39903265 filters atmospheric air before it enters the airend. The oil filter removes solid contaminants from circulating compressor lubricant. They are separate components installed in different parts of the compressor system.
4. Should the complete inlet filter housing be replaced when changing the 39903265?
Not necessarily. The 39903265 is a replaceable filter element within the inlet assembly. The housing, cover, brackets, and clamps can generally remain in service if they are undamaged and correctly assembled. These components should still be inspected during filter replacement.