The AirTAC GFR30008MLJC2WK AirTAC Filter Regulator PT1/4, 5 um is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT1/4" ports, a manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR30008MLJC2WK is a GFR-series filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This size 300 unit is built with a PT1/4 (1/4 in) port, the 5 um filter element (code W) for finer filtration than the standard 40 um grade, and a manual drain, so condensate is released only when an operator opens the drain. It is the low-pressure regulator type, fitted with an external round gauge reading in psi, and a reverse (check) valve is fitted. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits the standard operating envelope of this size.
This is a genuine AirTAC part. The GFR300 series is one of four sizes (200/300/400/600), with port sizes stepping up from 1/8 in to 1 in, optional G (BSPP) or NPT threads in place of the PT standard, a choice of manual, automatic or differential-pressure drains, 40 um or 5 um elements, gauge and scale options, and bracket choices. Flow for this family is published as curves rather than a single rated figure; ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR30008MLJC2WK AirTAC Filter Regulator PT1/4, 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (PT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 130 psi) |
| Pressure type | Low-pressure type |
| Adjusting mechanism | Balanced type |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -5 to +70 °C (unfreeze) |
| Drain type | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, psi scale |
| Reflux valve | Fitted (reverse flow permitted) |
Specifications follow the official AirTAC G-series air-preparation data. The regulating band is set by the drain type: automatic and differential-pressure drains regulate 0.15 - 0.9 MPa, a manual drain regulates 0.05 - 0.9 MPa. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. Air must not freeze in the unit. Flow curves, weight and outline dimensions are not published in our data set — ask us and we will confirm from the factory datasheet.
| GFR300 | G-series filter regulator, 300 body — sets the port range. |
|---|---|
| 08 | Port size PT1/4". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
Field order is size, port, drain, type, bracket, gauge, shape, scale, grade, thread, reflux — a blank position takes the default. Example: GFR300-08 is a 300 body, PT1/4", differential drain, standard type, bracket included, gauge fitted, 40 µm, PT thread, no reflux valve.
A larger body carries a larger port and holds set pressure better as flow rises. AirTAC publishes flow only as curves, so size the body from your peak demand with headroom. The GFR600 uses an aluminium-alloy bowl; the 200, 300 and 400 bodies use PC.
| This model | GFR300 · PT1/4" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
On a carton-sealing or bag-closing line, the low-pressure regulator holds a gentle, stable supply to the sealing and clamping cylinders while the 5 um element keeps fine particles out of the sealing valve, and the check valve holds downstream pressure during upstream dips.
At a spray booth or finishing station, the 5 um filtration protects the spray gun and air cap from particulate and water carryover, the low-pressure regulation suits the modest working pressure spray work needs, and the psi gauge lets the operator set and verify the setting at a glance.
On a lab or test-bench fixture running delicate pneumatic actuators, the low-pressure regulator type provides gentle control, the manual drain suits intermittent supervised use, and the round psi gauge documents the supply pressure for each test run.
Size and port: the 300 size with its PT1/4 port suits lines plumbed in 1/4 in; step up to 400/600 or down to 200 if your piping and air demand call for a different port. Drain: this unit is manual-drain, so plan a routine drain check; choose automatic or differential-pressure drain codes where unattended condensate removal matters. Filtration: the 5 um element here is the finer option versus the 40 um standard - pick 5 um where downstream equipment is sensitive to fine particulate. Gauge: the fitted round gauge reads in psi; embedded square gauges and MPa or bar scales are the other catalogue choices. Thread: PT is the standard; G (BSPP) and NPT are order options. No mounting bracket is included with this code.
Sizing honestly: AirTAC publishes flow for this family as curves, not a single rated number, so we cannot quote a rated flow here. Send us your application's flow and pressure requirements and we will confirm the datasheet figures before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as performance curves, not as a single rated figure, so we do not quote a rated flow, Cv or SCFM number here. Tell us your application's flow and pressure requirements and we will confirm the relevant datasheet figures for this 1/4 in, size 300 unit on request before you order.
The code MLJC2WK decodes L as the low-pressure regulator type, intended for applications regulated well below standard working pressures; the exact regulation range for this variant is not published in our sheet, so we confirm it on request. M is a manual drain, meaning condensate is released only when an operator opens the drain, so it suits supervised installations. J means no mounting bracket, C2 is the external round gauge with a psi scale, W is the 5 um filter element, and K means a reverse (check) valve is fitted.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity, thread type (PT / G / NPT), gauge scale and destination. We confirm price, availability and lead time — usually within 7-8 hours.