Oil-Gas Separation Filter Elements – Models KD390-010 · KD610-008 · KD900-018

Three interchangeable replacement elements for the final-stage oil-gas separation in oil-flooded rotary screw air compressors. Each model corresponds to a distinct dimensional envelope (outer diameter, height, thread/flange interface) but shares the same core technology: micron-grade glass-fiber media that coalesces oil mist from compressed air, returning lubricant to the system while discharging clean air with residual oil content typically ≤ 3 ppm w/w.

Key Features

• Glass-fiber media – high temperature resistance, corrosion-proof, electrostatic-dissipative design

• Filtration accuracy: captures particles down to 0.01–1 µm

• Initial differential pressure ≤ 0.02 MPa

• Change-out differential pressure: 0.08–0.15 MPa

• Service life: 3,000–4,500 hours under normal conditions

• Flow direction: Outside → Inside (air); oil drains via bottom return line

• Seal: NBR (standard); FKM optional for high-temperature or aggressive lubricants

• Mounting: spin-on or bolt-in per compressor housing design

Technical Specifications

📌 Model differences: KD390-010, KD610-008, and KD900-018 have different outer diameters, heights, and connection patterns. Verify dimensions (OD, length, thread size / flange bolt circle) against your existing element or compressor model before ordering.

Application Guidance

These elements are installed in the separator vessel of:

• Stationary and portable rotary screw air compressors

• Vacuum pump oil-mist recovery systems

• Chemical process compressor lube-oil separation

Selection by compressor size (approximate guide):

• KD390-010 – small to medium compressors (7.5–22 kW)

• KD610-008 – medium compressors (22–45 kW)

• KD900-018 – large compressors (45–90 kW)

Always confirm the element's rated flow capacity exceeds the compressor's actual displacement by 10–30 % to avoid excessive velocity, high residual oil, and premature clogging.

Installation & Service

1. Stop the compressor; depressurize fully; verify pressure gauge reads zero.

2. Disconnect power; tag out.

3. Remove the separator vessel cover; extract the spent element.

4. Clean the vessel interior and seal surfaces.

5. Install the new element – ensure the anti-static component contacts the vessel wall or cover plate.

6. Renew the gasket; close the cover; torque bolts evenly in a cross pattern.

7. Reconnect oil return line and control lines.

8. Restart; check for leaks; monitor differential pressure.

Replace when ΔP reaches 0.08–0.15 MPa or every 3,000–4,500 hours, whichever comes first. A zero ΔP reading indicates element rupture – replace immediately.

Ordering

Specify the exact model (KD390-010, KD610-008, or KD900-018) together with:

• Host compressor brand and model

• Rated displacement (m³/min or cfm)

• Lubricant type (mineral / semi-synthetic / full-synthetic)

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

• Mounting style (spin-on or bolt-in)

• Dimensions (OD, height, thread or flange pattern) – confirm against old element

Provide a photo or sketch of the existing element for cross-reference if uncertain. Custom dimensions can be accommodated – typical lead time 3–7 days.

All values nominal; KD390-010, KD610-008, and KD900-018 are glass-fiber oil-gas separation elements with 0.01–1 µm filtration accuracy, ≤ 3 ppm residual oil, ≤ 0.02 MPa initial ΔP, 0.08–0.15 MPa change-out ΔP, 3,000–4,500 h service life, and anti-static construction. Dimensional envelope varies by model – confirm against existing element before ordering. Replace proactively at change-out ΔP; zero ΔP indicates rupture.