Ingersoll Rand 49164395 Air Filter Element | Donaldson FPG10 Spec

Product Overview

49164395 is the intake air filter element used on Ingersoll Rand screw air compressors, manufactured to Donaldson FPG10 specifications.

Its construction differs significantly from conventional single-stage air filters. FPG10 is a two-stage intake filtration system. Air first passes through an integrated tangential pre-cleaner — the airflow enters tangentially and spins at high speed, centrifugal force drives coarse particles to the housing wall, and approximately 85% of coarse dust is separated before reaching the primary element, then automatically discharged through the Vacuator dust valve at the housing base. Pre-cleaned air then enters the primary element, where cellulose filter media performs fine filtration. This architecture proves most valuable in dusty environments: the primary element carries only fine-particle load, maintaining longer service life even under high dust conditions.

The sealing method also differs from traditional air filters. FPG uses Donaldson's RadialSeal technology: a one-piece molded polyurethane end cap forms a radial seal directly against the housing outlet tube, eliminating the glued gasket of older axial elements. Fewer parts mean fewer failure points — gasket aging, detachment, and installation misalignment are eliminated in the FPG design, and no tools are required for installation or removal.

Key Specifications

Technical Parameters

Filtration Performance

Practical difference of two-stage design: A single-stage filter's media must handle both coarse and fine particles, causing rapid surface loading, fast pressure rise, and short life. FPG10 transfers the coarse-dust burden to the centrifugal pre-cleaner, significantly improving the primary element's load profile — this is why it is widely adopted on construction machinery and generator sets operating in dusty conditions.

Flow and Pressure Drop

Pressure drop and energy relationship: Rising intake resistance reduces intake pressure and density; the unit must work harder to maintain set discharge pressure and flow, increasing specific power. Based on 0.7 MPa discharge pressure and 101.3 kPa atmospheric pressure:

Engineering implication: As the element progresses from new to heavily clogged (0 → 6 kPa), unit energy consumption rises by approximately 6%. This ongoing electricity cost typically far exceeds the price of a filter element — which is why the original FPG10 filter housing includes a restriction indicator port: replacement timing should be determined by actual resistance, not calendar estimates.

Dimensions and Installation

Procurement note: When cross-referencing replacements, verify all three dimensions: 208 mm OD, 106 mm ID, 409 mm length. The FPG design uses radial sealing; push in until the end cap contacts the outlet tube — no additional gasket is needed. Do not attempt to add a gasket, as it will disrupt the radial seal fit.

Material Construction

Construction note: Traditional axial elements consist of three parts — metal end cap, glued gasket, and separate seal ring. Aging of any one causes bypass. FPG encapsulates the end cap, sealing surface, and media ends in a single polyurethane body, reducing part count and improving seal reliability — which also enables tool-free installation.

Operating Conditions

Service Life and Maintenance

Applicable Standards

Standard Maintenance and Installation Steps

A key feature of the FPG design is tool-free maintenance, with each service taking approximately 15 minutes.

1. Shut down, confirm zero pressure, lock out/tag out
   Stop the unit, disconnect main power and apply lockout/tagout. Criterion: controller shows system pressure at 0.

2. Open the FPG filter service cover
   Release the service cover latches — FPG is designed with two spring latches or a twist-off cover, requiring no tools. Criterion: latches intact, cover not deformed.

3. Remove the old element
   Grip the polyurethane end cap and pull straight out. Criterion: note that the RadialSeal design has no gasket to peel — if residual gasket material is found on the housing outlet tube, a non-genuine part was previously installed and must be cleaned off.

4. Inspect the Vacuator dust valve
   Check the Vacuator valve (rubber duckbill) at the housing base. Criterion: valve opens and closes freely, no dust caking, no foreign object blockage. This is the most commonly skipped step in FPG maintenance and the most consequential — a blocked dust valve disables the pre-cleaner, transferring the entire dust load to the primary element and significantly shortening its life.

5. Inspect pre-cleaner stage and housing for dust traces
   Look for dust bypass tracks inside the housing and abnormal accumulation in the pre-cleaner swirl zone. Criterion: no dust track bands on inner walls; if tracks are present, inspect sealing surfaces.

6. Install the new element
   Push 49164395 into the housing until the polyurethane end cap contacts the outlet tube. Criterion: end cap seats fully against outlet tube; no gasket is needed or permitted.

7. Reinstall service cover and check restriction indicator
   Replace cover, secure latches. Confirm restriction indicator is in green zone; if resettable, press reset and verify it returns properly. Criterion: green zone reading, indicator functions normally.

8. Start up and record
   Start the unit, run to operating temperature, read intake restriction. Criterion: resistance within new-element baseline range; record date, running hours, and resistance reading.

Installation rule: Do not start the unit before the element is properly seated. If the RadialSeal is not pushed fully into position, air bypasses directly through the gap between end cap and outlet tube, disabling both pre-cleaner and primary element — equivalent to running with no filter.

Frequently Asked Questions

What specification is 49164395?
A two-stage RadialSeal primary element manufactured to Donaldson FPG10 specifications. The integrated tangential pre-cleaner removes approximately 85% of coarse dust first; the primary element handles fine filtration.

Is it interchangeable with 49101637?
No. 49101637 is FPG09, with different dimensions and rated airflow. Verification is simple: read the specification marking on the installed element's end cap — if it reads FPG10, order this part; if FPG09, order 49101637.

Why does this element have no gasket?
Because it uses RadialSeal radial sealing. The polyurethane end cap body forms a seal directly against the housing outlet tube, requiring no additional glued gasket or separate seal ring. Fewer parts, fewer failure points, and less chance of incorrect installation.

What does the Vacuator dust valve do?
It is the pre-cleaner dust discharge port. Coarse dust separated by centrifugal action in the pre-cleaner falls by gravity to the housing base and is automatically discharged through the Vacuator valve. Once the valve clogs, the pre-cleaner is completely disabled, and all dust loads the primary element directly. Check it at every element change — this is the critical maintenance action for the FPG design.

How often should it be replaced?
Recommended interval is 2,000 hours or 3 months, whichever comes first. More accurately, follow the restriction indicator: schedule replacement when resistance enters the yellow zone. In high-dust sites, replace earlier based on indicator readings.

Can the element be blown clean and reused?
No. This is a dry, disposable element — it cannot be washed or reverse-blown with compressed air. Reverse blowing damages the filter media fiber structure, creating invisible channels that allow unfiltered air to pass through, which is more dangerous than not replacing at all.

Can a gasket be added to improve sealing?
No, and it is unnecessary. RadialSeal relies on radial compression of the end cap body to form the seal. Adding a gasket pushes the element away from the outlet tube, disrupting the seal fit and causing bypass.

The restriction indicator never moves — is that normal?
No. A stuck indicator is a common failure point that can give a "clean" reading even when the element is actually clogged. Press-check it at every service to verify it returns properly; if it has failed, replace elements on a conservative time-based schedule until repaired.

What are the pros and cons of FPG's plastic housing versus metal?
The FPG injection-molded housing is corrosion-resistant, lightweight, and vibration-resistant — it will not rust in coastal salt-spray or humid environments. The tool-free service design also speeds up field maintenance. This is why the FPG series is widely used on construction machinery and mobile equipment.

How can I be 100% certain this is the right part?
Three steps: (1) Read the specification marking on the installed element's end cap to confirm FPG10; (2) Measure the old element's OD and length to verify 208 mm and 409 mm; (3) If the old element is discarded, provide the filter housing model marking and we will cross-reference by FPG specification.

Compatible Equipment

This part is supplied to Donaldson FPG10 specifications and fits Ingersoll Rand screw air compressors equipped with FPG10 air filter housings.

FPG10 is a Donaldson complete filter assembly specification adopted by OEMs as a standard intake filtration unit. Key identification points:

How to confirm compatibility

1. Preferred: Read the specification marking on the installed element's end cap. If it reads FPG10, this part fits; if FPG09, order 49101637.
2. Alternative: Measure the old element's OD and length to verify 208 mm × 409 mm.
3. Fallback: Provide the filter housing model marking or unit nameplate photo, and we will cross-reference by FPG specification.

Note on model coverage:

Donaldson FPG10 is a universal filter housing adopted by multiple OEMs, so this part's compatibility does not correspond exactly to any single specific model list. The determining factor should be whether the filter housing specification is FPG10, not the unit model itself. If the unit nameplate does not indicate the filter housing specification, confirm using any of the three methods above.

Related Components

The FPG10 air filter is a complete system. In addition to the primary element, there are 7 components serviced alongside this part. Listed by component — function — inspection point:

Companion replacement recommendation: The maintenance value of the FPG10 system centers on whether the pre-cleaner is working properly. When changing the primary element, inspect the Vacuator valve and restriction indicator at the same time. Failure of either small component will noticeably shorten primary element life — their cost is far lower than the primary element, yet they determine how long it lasts.