Oil-Gas Separation Filter Element – Models RSC12031 · KR1420-006P · RSC1203-1 · IC-RSC12031-1

Four Interchangeable part numbers for the same high-efficiency oil-gas separation element engineered for oil-flooded rotary screw air compressors and related compressed-air systems. The element performs the final-stage separation of lubricating oil mist from compressed air, ensuring the discharged air meets cleanliness requirements while recovering lubricant for recirculation. All four designations (RSC12031, KR1420-006P, RSC1203-1, IC-RSC12031-1) refer to the same core product platform and are fully interchangeable.

How It Works

The element processes oil-laden compressed air discharged from the compressor block through three sequential mechanisms :

1. Interception & Diffusion – As the air stream passes through micron-grade glass-fiber media, large oil droplets are directly intercepted; sub-micron droplets undergo Brownian motion and contact the fibers.

2. Coalescence – Captured droplets collide, merge, and grow into larger oil drops on the media surface.

3. Gravity Settling & Return – Large drops penetrate the media under aerodynamic and gravitational forces, settle into the bottom groove of the element, and return to the lubrication system via the return line — discharging clean compressed air with extremely low residual oil content (typically ≤ 3 ppm w/w) .

Key Features

• Glass-fiber media (alternative: polypropylene fiber or activated carbon fiber) — high temperature resistance, corrosion resistance; glass-fiber is the most widely used media in industrial applications

• Filtration accuracy: intercepts 0.01–1 µm particulates

• Initial differential pressure ≤ 0.02 MPa

• Service life: 3,000–4,500 operating hours under normal conditions (shorten in harsh environments or with poor-quality lubricant)

• Compliant with JB/T 10910-2025 – General oil-injected rotary air compressor – Oil-gas separation filter element; supports the industry requirement of ≤ 30 mg/m³ oil carry-over from screw compressors

• Electrostatic-dissipative design – anti-static metal pin/copper strip ensures safe operation

• Spin-on or bolt-in mounting – gasket sealed; vertical installation in the separator vessel

Technical Specifications

📌 Zero differential pressure indicates element rupture or air short-circuit — replace immediately .

Application Guidance

Deployed as the final-stage fine separation element (also called "precision separation") in:

• Oil-flooded rotary screw air compressors (22 kW and above typically use internal elements; 7.5–15 kW typically use external spin-on elements)

• Vacuum pump oil-mist separation

• Hydraulic reservoir breather oil separation

• Chemical compressor lubrication oil recovery

Selection criteria :

• General pneumatic tools (≤ 10 ppm): standard grade

• Textile, chemical (≤ 5 ppm): high-efficiency grade

• Food, pharmaceutical, electronics (≤ 3 ppm): ultra-high-efficiency grade

The element's rated flow capacity must be 10–30 % higher than the compressor's nominal displacement . Undersized elements cause high velocity, elevated residual oil, excessive ΔP, and shortened life.

Why Oil-Gas Separation Matters

A failing element triggers five cascading failures :

1. Clogging → soaring exhaust resistance → surging power consumption — motor load rises, operating current increases

2. Rupture → excess oil carry-over — contaminates spray painting, pneumatic components, adsorption dryers, and precision downstream filters; causes product defects in food, pharma, electronics, and coating lines

3. Poor oil return → host overheating trip — accumulated lubricant cannot drain back, oil level rises inside the element, gas entrains more oil, separator tank temperature climbs, triggering high-temperature alarms and frequent shutdowns

4. Frequent oil make-up — lubricant costs double

5. Downstream equipment damage — dryers lose effectiveness, precision filters clog rapidly

Matching the correct element and replacing it proactively at the 0.08–0.15 MPa change-out differential pressure is the single most cost-effective maintenance decision for any compressed-air system.

Fluid Compatibility

• Mineral compressor lubricants — NBR seal standard

• Semi-synthetic and full-synthetic compressor oils — extended service life (semi-synthetic: 3,000–4,000 h; full-synthetic: 6,000–8,000 h)

• Not suitable for highly polar fluids or phosphate-ester synthetic lubricants without media customization

Installation & Service

External spin-on element (7.5–15 kW machines) :

1. Stop the compressor; cool to ambient temperature; open the drain valve to fully release system pressure; verify the pressure gauge reads zero.

2. Cut main power; tag "Do Not Energize".

3. Clean the mounting base; remove residual oil and debris.

4. Use a strap wrench to unscrew the old element counterclockwise (clockwise for reverse-thread models).

5. Apply a thin film of lubricant to the new gasket; hand-thread until the gasket contacts the base, then tighten ¼–½ turn with a wrench — do not overtighten.

6. Restore power; test-run; inspect for oil or air leaks.

Internal element (22 kW and above) :

1. Depressurize and de-energize as above.

2. Disconnect the minimum pressure valve line, oil return line, and control lines — label each for correct reassembly.

3. Remove the top cover using a cross-pattern bolt loosening sequence.

4. Extract the spent element (dispose — never reuse); thoroughly clean the vessel interior and top-cover sealing face.

5. Place the new element vertically centered in the vessel; apply a thin film of lubricant to the new gasket; ensure the anti-static metal component contacts the vessel wall or cover plate.

6. Reassemble in reverse order; torque bolts evenly in a cross pattern.

7. Power on; verify no oil leakage, no air leakage; observe oil level and operating status.

⚠️ Critical: A zero differential pressure reading means the element is ruptured or the airflow is short-circuiting — replace immediately . Monitor ΔP continuously; replace at 0.08–0.15 MPa regardless of elapsed hours. Shorten the interval in dusty, humid, or high-temperature environments, or when lubricant quality is poor .

Quality Assurance

• JB/T 10910-2025 – General oil-injected rotary air compressor – Oil-gas separation filter element (issued by the Ministry of Industry and Information Technology, effective November 1, 2025)

• ISO 8573-1 – Compressed air purity classes (reference)

• Bubble-point integrity test per media specification

• Dimensional and gasket compatibility verification against the host separator vessel

Ordering

Specify any one of the interchangeable part numbers — RSC12031 / KR1420-006P / RSC1203-1 / IC-RSC12031-1 — together with:

• Host compressor model and rated displacement (element flow capacity must exceed compressor displacement by 10–30 %)

• Required residual oil grade: standard (≤ 10 ppm) / high-efficiency (≤ 5 ppm) / ultra-high-efficiency (≤ 3 ppm)

• Lubricant type: mineral / semi-synthetic / full-synthetic

• Mounting style: spin-on (external) or bolt-in (internal)

• Element dimensions (OD, length, thread or flange pattern) — confirm against the existing element

• Operating pressure and temperature of the separator vessel

Provide the existing element's dimensions or the host compressor model for cross-reference confirmation. Non-standard legacy vacuum pumps and customized compressors can be measured and manufactured to order — typical lead time 3–7 days.

All values nominal; RSC12031, KR1420-006P, RSC1203-1, and IC-RSC12031-1 are fully interchangeable designations for the same oil-gas separation element platform. Glass-fiber media, 0.01–1 µm filtration accuracy, ≤ 3 ppm w/w residual oil, ≤ 0.02 MPa initial ΔP, 0.08–0.15 MPa change-out ΔP, 3,000–4,500 h service life, compliant with JB/T 10910-2025 . The element intercepts and coalesces oil mist from compressed air, returns lubricant to the system via the drain line, and discharges clean air. Exact dimensional envelope varies by host separator vessel — confirm against your existing element before ordering. Replace proactively at the change-out differential pressure; a zero ΔP reading indicates rupture and requires immediate replacement .