5 models in this file
Replacement Filters and Diaphragms for Quincy Compressors
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Quincy has built a longstanding industrial reputation for producing rugged, cast-iron reciprocating and rotary screw air compressors designed to operate in high-demand industrial shops, agricultural facilities, and mobile repair trucks. Operators running a primary quincy air compressor know that long-term mechanical reliability depends heavily on regular preventive upkeep. Over extended runtimes, atmospheric dust, shop particulates, and mechanical cyclic fatigue degrade vital wear items such as intake filter elements and valve tower unloader diaphragms. Because genuine factory parts can occasionally face distribution delays, high-grade aftermarket quincy air compressor parts provide a dependable, directly interchangeable path to restoring peak operational efficiency without prolonged equipment downtime.
While the intake air filters examined here vary substantially by mounting diameter, pleat surface area, and housing geometry, the unloader tower diaphragms focus specifically on isolating airflow and balancing cycling head pressures across heavy-duty reciprocating pumps.
The line-up at a glance
Quincy Air Compressor Parts Compared
| Model | Component Type | Equivalent Part Numbers | Quantity Included | Rated Service Life / Warranty |
|---|---|---|---|---|
| American Made Air Filter fits Quincy | Intake cleaner element | 112845-06, 11284506, Ridgid 18013 | 1 Count | 6 months warranty |
| Unloader Tower Diaphragms Compatible with Quincy | Unloader tower diaphragm | 1855 | 2 Pcs | Not listed |
| 2 Pcs 110377E100 Air Filter | Pleated intake filter | 110377E100, 110377E904, 32012957, 32165466, P5051A, 1R417 | 2 Count | 2500 to 3000 hours |
| Air Compressor Unloader Tower Diaphragms Compatible | Unloader tower diaphragm | 1855 | 2 Pcs | Not listed |
| 2 Pcs 2023400852 Air Filter | Pleated intake filter | 2023400852, 2023-4008-52, 2023400859, S1027, P05051A, 51291 | 2 Count | 2500 to 3000 hours |
No. 1 of 5 · Sellerocity
American Made Air Filter fits Quincy for Compact Intake Filtration
8.4/10 Our score
Best for: Contractors needing a single direct intake filter
What the listing says
- American Made high pleat count filter
- 6 month no hassle warranty
Pros
- American made high pleat count element
- Six-month no-hassle warranty
- Compact 3-inch diameter fit
Cons
- Single unit package
- Vehicle-specific fitment limits compatibility
The American Made Air Filter fits Quincy from Sellerocity is a direct replacement intake air cleaner element tailored for smaller footprint compressor housings. Built specifically to match OEM equivalent part number 112845-06 (also cataloged as 11284506 and crossing to Ridgid 18013), this single-pack cylindrical element is classified for vehicle-specific fitments and dedicated utility compressor assemblies. Featuring a compact 3-inch diameter, it slots into compatible intake filter silencers to form an essential first line of defense against abrasive environmental contamination.
From a manufacturing standpoint, this filter element emphasizes structural integrity through an American-made, high pleat count design. Dense pleating maximizes the available particulate collection area within a constrained external footprint, allowing the compressor head to breathe without excessive inlet restriction. Sellerocity backs the unit with a six-month no-hassle warranty and specifies a six-month spare parts availability window under European Union standards, giving equipment operators reliable peace of mind when performing seasonal tune-ups.
This intake element is ideally suited for technicians and service contractors operating service truck compressors or smaller utility units that use the classic 3-inch round cannister. It protects cast-iron cylinders and intake reed valves from early scoring caused by airborne debris. However, if your setup relies on mid-sized or industrial high-volume two-stage reciprocating pumps requiring 4-inch or 11-inch canisters, you will need to step up to larger options such as the 110377E100 or 2023400852 filter assemblies.
No. 2 of 5 · Hoylty
Unloader Tower Diaphragms Compatible with Quincy for Head Pressure Control
9.0/10 Our score
Best for: Workshops maintaining multi-model reciprocating compressors
What the listing says
- Part number: 1855
- Replacement Part This set of two diaphragms is designed to replace worn or damaged unloader tower diaphragms in…
- Compatibility Compatible with Quincy 1855 compressor Unloader Diaphragm Air Compressor Parts 325, 390, 350, 5120
- Part shape and performance: This hexagonal design with holes can play the roles of isolation, buffering,…
- Package includes: 2 pcs (brand new and unopened for use)
Pros
- Compatible across five major pump models
- Hexagonal design regulates pressure balance
- Includes two brand-new diaphragms
Cons
- Limited strictly to unloader tower assemblies
- Requires AC powered compressor system
The Unloader Tower Diaphragms Compatible with Quincy by hoylty are engineered specifically to rebuild the unloader tower mechanism on Quincy reciprocating compressors. Supplied as a package of two brand-new, unopened diaphragms, these components carry part number 1855. They provide direct replacement compatibility across several renowned heavy-duty compressor lines, including the Quincy 250, 325, 350, 370, 390, and 5120 series pumps driven by AC electric power sources.
Mechanically, these unloader diaphragms feature a precision hexagonal design punctuated with perimeter mounting holes. This geometry is vital inside the unloader tower assembly, where the diaphragm plays three concurrent roles: isolation, buffering, and regulating internal airflow during operational transitions. By properly managing the inflow and outflow of gas across the unloader mechanism, the flexible membrane maintains system pressure balance, venting head pressure during unloader activation so the drive motor can start without working against trapped head pressure. The pair weighs just 0.05 kilograms, making them effortless to pack into a service technician tool chest.
This diaphragm two-pack suits shop mechanics, industrial plant technicians, and equipment rebuilders whose compressors power pneumatic tools, tire inflation systems, or spray painting booths. When unloader towers fail to vent head pressure, the compressor motor strains or trips breakers upon startup. Installing these fresh diaphragms restores consistent cycle control. If your current maintenance objective is preventing airborne contaminants rather than diagnosing valve head pressure issues, you will want an intake cleaner element instead.
No. 3 of 5 · Gevodakun
2 Pcs 110377E100 Air Filter for Heavy-Duty Canister Filtration
8.4/10 Our score
Best for: Heavy industrial setups requiring high-efficiency filtration
What the listing says
- HIGH-EFFICIENCY FILTRATION – Our 110377E100 air filter made of multi-layer composite filtration paper, features a large…
- HEAVY-DUTY CONSTRUCTION – Our air compressor filter have heavy-duty construction, durable polyester fiber element and dual…
- LONG SERVICE LIFE – Heat resistance, impact resistance, ensuring long-lasting performance.
- REDUCE MAINTENANCE COSTS – Our air compressor filter meets OEM specifications, offering a more affordable replacement to brand-name parts.
- EASY INSTALLATION – No specialized tools or technical support needed, install in just a few simple…
Pros
- Sub-micron filtration at 99 percent efficiency
- Dual mesh screens and polyester fiber
- Rated for up to 3000 operating hours
Cons
- Pack contains two identical units
- Specific to 4.33-inch canister housings
The 2 Pcs 110377E100 Air Filter set from Gevodakun delivers high-capacity filtration for mid-sized reciprocating and industrial rotary screw systems. Engineered to direct OEM specifications, this two-pack replaces part number 110377E100 along with alternate part numbers 110377E904, 32012957, 32165466, P5051A, and 1R417. Measuring 4.33 inches long, 4.33 inches wide, and 4.61 inches high, each filter element weighs 9.28 ounces and is packaged with two complete filters to support consecutive maintenance cycles.
Filtration efficiency is a standout feature of this model. Built with multi-layer composite filtration paper and a polyester fiber element, the filter achieves a 0.1-micron precision rating with up to 99 percent capture efficiency. This fine filtration barrier traps micro-particulates, metal shavings, and shop dust before they reach the compressor pump. Structural durability is reinforced by heavy-duty dual mesh screens on the inner and outer diameters, which prevent pleat collapse under intense inlet suction while delivering heat and impact resistance. The listing rates each element for an extended operational service life of 2500 to 3000 hours, requiring only basic mechanical hand tools for a rapid, multi-step installation.
This two-piece kit is the perfect match for busy automotive garages, cabinet shops, and manufacturing cells running medium-frame compressors where high airflow demand meets fine atmospheric dust. Its dual mesh reinforcement ensures optimal shape retention in demanding environments. However, if your pump uses the smaller 3-inch intake opening found on 112845-06 housings or requires the oversized 11-inch diameter of the 2023400852 series, this 4.33-inch unit will not fit your canister.
No. 4 of 5 · Wfcyq
Air Compressor Unloader Tower Diaphragms Compatible for Valve Tower Rebuilds
9.0/10 Our score
Best for: Technicians rebuilding unloader towers on 1855 heads
What the listing says
- Replacement Part This set of two diaphragms is designed to replace worn or damaged unloader tower diaphragms in…
- Durable Construction withstand the demands of industrial air compressor applications
- Easy Installation Straightforward replacement process to get your compressor back in optimal working condition
- Hexagonal Shape The diaphragms feature a hexagonal design with six mounting holes for a secure fit
- Compatible with: Quincy 1855 compressor Unloader Diaphragm Air Compressor Parts 325 / 390 / 350 /…
Pros
- Six mounting holes ensure secure seal
- Durable industrial construction
- Two-pack covers immediate and spare needs
Cons
- No additional installation hardware included
- Limited strictly to unloader tower applications
The Air Compressor Unloader Tower Diaphragms Compatible offered by populargoods and manufactured by WFCYQ supply another focused solution for servicing Quincy 1855 unloader towers. Delivered as a set of two diaphragms, this kit replaces worn, cracked, or hardened membranes on model 1855 assemblies used across Quincy 325, 350, 390, and 5120 reciprocating compressors powered by AC electrical systems.
Constructed to endure industrial demands, each diaphragm features a distinct hexagonal layout equipped with six precision mounting holes. These holes align with unloader tower cap studs to establish an airtight seal against pressure loss. The package measures 3.5 by 3.35 by 0.28 inches with a total weight of 2.08 ounces. By isolating control air and buffering valve actuation, these flexible membranes ensure the compressor unloader mechanism vents trapped cylinder pressure smoothly whenever the pressure switch cuts out the motor.
Maintenance professionals and rebuilding shops that handle legacy Quincy pump heads will find this two-pack an indispensable addition to their spare parts stock. It allows technicians to service the unloader tower immediately when diagnosing air leaks or motor starting stalls. Because it matches the functionality of the hoylty 1855 set, choosing between them comes down to packaging preference, while users needing intake air filtration should bypass unloader diaphragms in favor of dedicated inlet filter cartridges.
No. 5 of 5 · Bounetim
2 Pcs 2023400852 Air Filter for High-Capacity Inlet Protection
8.8/10 Our score
Best for: Large workshops needing extended intake filter service
What the listing says
- FIRST LINE OF DEFENSE – 2023400852 air filter is installed at the air inlet of the…
- EXCELLENT FILTRATION EFFECT – 2023400852 air filter is made with a polyester fiber element surrounded by…
- STRONG & DURABLE – Our 2023400852 air compressor filter alternatives have heavy-duty construction to withstand harsh conditions and challenging operating environments.
- MORE COST-EFFECTIVE – Our 2023400852 air compressor filter element meet or exceed OEM specifications and more…
- REPLACE THE FILTER REGULARLY – Regular replacement of the filter element can effectively extend the service…
- 2023400852 = 2023-4008-52 = 2023400859 = S1027 = P05051A = 51291
Pros
- Sub-micron 99 percent filtration accuracy
- Reinforced mesh screen on both sides
- Up to 3000 hours service life
Cons
- Bulky 11-inch diameter canister
- Requires regular 2000-hour inspection
The 2 Pcs 2023400852 Air Filter package by Bounetim is designed for large-displacement industrial compressors requiring maximum surface area and minimal airflow restriction. This two-pack directly cross-references to OEM part numbers 2023400852, 2023-4008-52, 2023400859, S1027, P05051A, and 51291. It provides heavy-duty inlet protection across high-output reciprocating pumps and large stationary screw compressors.
Engineered for high filtration volume, this substantial element measures 11 inches in length, 11 inches in width, and 11.8 inches in height, with the pair weighing 15.84 ounces. The media comprises a high-efficiency pleated polyester fiber element encased by structural wire mesh screens on both the inner and outer circumferences. This rigid reinforcement prevents deformation under intense continuous vacuum, maintaining full surface area exposure across the entire pleat structure. The media yields a 0.1-micron filtration accuracy and 99 percent efficiency, effectively stopping fine abrasive grit. The listing notes an operational lifespan of 2500 to 3000 hours, while recommending a standard replacement cycle of around 2000 hours depending on shop workload and environmental dust levels.
This air filter kit is best suited for large commercial workshops, sandblasting operations, and production floors running high-horsepower Quincy compressors that demand superior dirt-holding capacity. Its oversized 11-inch diameter makes it unmatched for high CFM flow, but it is physically much too large for compact 3-inch or mid-sized 4.33-inch intake housings.
Before you choose
How to Choose the Right Quincy Air Compressor Parts
Selecting the proper replacement component for an industrial compressor requires careful attention to pump architecture, component role, and dimensional fitment. Operating heavy machinery with degraded or mismatched parts leads to increased internal wear, excessive electrical draw, and compromised air purity. When sourcing quincy compressor maintenance parts, consider the following technical factors:
- Exact Part Number Cross-Referencing: Before placing an order, consult the compressor manual or inspect the stamped numbers on your existing components. Air filter models such as the American Made 112845-06, Gevodakun 110377E100, and Bounetim 2023400852 each serve entirely distinct housing formats. Cross-referencing alternative factory numbers like 32012957 or S1027 guarantees that mounting flanges and canister depths align correctly.
- Filtration Efficiency and Media Design: Intake elements are the primary barrier protecting valve plates and cylinder walls from abrasive particulates. For fine dust environments, select filters with sub-micron ratings and dual mesh support screens, such as the 0.1-micron media found in the Gevodakun and Bounetim units. The dual wire mesh prevents pleat collapse under high intake suction.
- Diagnosing Head Unloader Problems: If your compressor motor struggles to start, trips thermal breakers, or fails to release trapped air when reaching cutout pressure, the unloader tower diaphragm has likely perished. The hoylty and populargoods 1855 hexagonal diaphragms restore proper pressure isolation and buffering across Quincy 250, 325, 350, 370, 390, and 5120 pump heads.
- Maintenance Intervals and Fleet Management: Technicians managing fleet operations often carry multi-function service gear such as a dewalt jump starter with air compressor for rapid roadside calls, while preserving dedicated shop air systems for continuous production. Keeping a multi-pack of filters or diaphragms in your shop inventory ensures that 2000-hour service intervals are met without machine downtime.
Questions people ask
FAQ
How often should a quincy air filter replacement be installed?
Under typical industrial operating conditions, a quincy air filter replacement should occur every 2000 to 3000 operating hours. However, in heavily contaminated environments like woodworking shops, metal fabrication bays, or mobile job sites, elements should be inspected monthly and replaced sooner if pleats show heavy dust loading, oil contamination, or physical restriction.
How do I determine which quincy part do i need for my compressor?
To determine which quincy part do i need, locate the metal data plate stamped onto your compressor pump crankcase or air receiver tank. Note the pump model number, such as 325, 390, or 5120, and cross-reference your existing part numbers against replacement listings. If replacing an intake filter, measuring the outer diameter and overall height helps verify whether your canister accepts a 3-inch, 4.33-inch, or 11-inch element.
What are the symptoms of a failing quincy 1855 unloader diaphragm?
When a quincy 1855 unloader diaphragm fails, the unloader tower cannot properly control airflow or vent trapped cylinder head pressure during shutdown. Common symptoms include continuous hissing air leaks from the unloader tower, electric motors stalling or humming on restart, and blown fuses or tripped thermal overload switches caused by starting against full head pressure.
Can third-party replacement parts match original equipment quality?
Quality aftermarket replacements that match OEM specifications provide excellent durability and performance. Filters featuring multi-layer composite media, 0.1-micron filtration accuracy, and dual reinforcing wire mesh deliver filtration efficiency up to 99 percent, matching factory requirements for internal pump protection. While contractors evaluating compact utility units might read about a california air tools compressor for quiet operation, heavy cast-iron industrial pumps depend entirely on robust, well-fitted maintenance components.
What is the difference between the 110377E100 filter and the 2023400852 filter?
While both filters feature 0.1-micron filtration precision, polyester fiber media, and dual mesh screens, they differ significantly in size. The 110377E100 filter measures 4.33 inches in diameter and 4.61 inches in height for medium-duty housings, whereas the 2023400852 air filter for quincy compressor applications is an oversized element measuring 11 inches in diameter and 11.8 inches in height, designed for high-displacement, high-CFM industrial systems.
Prices, specifications and the feature lines above are read from the product listing and can change without notice. Scores are out of 10, based on listed specifications and buyer feedback; nothing on this page is written from handling the product.
