The AirTAC GFR30008ALJC2WK 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 automatic drain and regulates 0.15 - 0.9 MPa (20 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR30008ALJC2WK is a size-300 filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is threaded PT1/4 (1/4 in), carries the fine 5 um filter element (code W) for cleaner air than the standard 40 um grade, and drains condensate automatically, so the bowl does not rely on someone opening a manual drain. The regulator is the low-pressure type, and an external round gauge with a psi scale is fitted so the set pressure is visible at the unit. A reverse/check valve is included, and no mounting bracket is supplied with this code.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of PT, G or NPT thread, manual, automatic or differential-pressure draining, 40 um or 5 um filtration, gauge style and scale options, and standard or low-pressure regulation. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR30008ALJC2WK AirTAC Filter Regulator PT1/4 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (PT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 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 | Automatic 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". |
| A | Drain: Automatic drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 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) |
Feeding clean, regulated air to the tool-change and clamping circuits of a CNC machining centre, where the 5 um element protects fine pneumatic valves from particulate and the psi gauge lets setters verify set pressure at the unit.
Conditioning the compressed air feeding analytical instruments and lab automation, where the low-pressure regulator type holds a modest working pressure and the automatic drain keeps condensate off the instrument without daily attention.
Supplying filtered, regulated air to the pick-and-place cylinders and seal jaws on a packaging line, with the check valve holding the downstream circuit if upstream supply dips and the psi gauge giving operators a visible setpoint.
Start with the port step: this unit is size 300 with a 1/4 in PT thread, and the sensible check is whether your line's air demand sits comfortably within the size-300 flow curve rather than forcing a smaller port to carry it. Because flow is published as curves and not a single rated figure, send us your application details and we will confirm sizing against the datasheet before you order. The 5 um element in this code suits points of use that see finer contamination than the standard 40 um grade handles; if the application only needs bulk water and chip removal, the standard grade is the alternative.
Other decodable choices on this family: draining is automatic here (manual and differential-pressure draining exist as alternatives), the gauge is the external round type on a psi scale (an embedded square gauge is standard, with MPa or bar scales available), the thread can be ordered as G (BSPP) or NPT instead of PT, and a mounting bracket can be specified if the J (no bracket) option does not suit your panel. The low-pressure regulator type is the right pick where the working pressure sits below the standard unit's range; we will confirm the exact adjustment range on request.
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 curves rather than a single rated figure, so there is no one rated flow number we can honestly quote for this 1/4 in unit. Tell us your application's air demand and we will confirm the sizing against the datasheet curves on request before you order.
The L in the code marks the low-pressure regulator type, intended for applications whose working pressure sits below the standard unit's range; the exact adjustment range for this variant is not published in our sheet, so we confirm it on request. The A marks automatic condensate draining, which ejects collected water from the PC bowl without a manual drain being opened. The C2 adds an external round gauge on 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.