The AirTAC GFR30008MLJC1WTK AirTAC Filter Regulator 1/4 in NPT 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 GFR30008MLJC1WTK is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in a single body. It removes water and particulate from compressed air through a 5 um element (the fine grade, code W) and regulates downstream pressure with a low-pressure type regulator. This configuration is 1/4 in NPT ported, has a manual drain on the PC bowl, comes with an external round gauge scaled in MPa, and includes a built-in reverse/check valve. No mounting bracket is fitted. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
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, and with choices of drain type, filter grade, gauge style and scale, thread (PT standard, G and NPT as options), bracket and reverse valve. Flow figures are published as curves rather than a single rating, so ask us to confirm sizing or any datasheet figure for your application before ordering.
| Model | GFR30008MLJC1WTK AirTAC Filter Regulator 1/4 in NPT |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT 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, MPa 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. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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 machining or assembly fixture that holds workpieces with air clamps running at low set pressures, this unit filters the supply to 5 um and lets the operator dial in a gentle, stable regulating pressure while the MPa gauge shows the setting at a glance.
Feeding the low-pressure actuation zone of a packaging or cartoning line, the unit strips water and fine particles from the shop air, the check valve holds the downstream circuit against supply reversals, and the manual drain is bled during scheduled changeover.
On a laboratory or pilot-plant test bench where instruments and pilot valves need clean, finely regulated air at low pressures, the 5 um element protects the hardware and the round MPa gauge gives a clear, repeatable setpoint reading.
Size 300 with a 1/4 in NPT port suits lines where moderate flow and compact mounting matter; step up to size 400 or 600 where the demand curve is higher. The 5 um element (code W) is the finer of the two published grades (40 um standard), a sensible choice where downstream valves or instruments are sensitive to fine particulate. The manual drain means an operator opens the bowl drain periodically - choose the automatic or differential-pressure drain variant instead if the unit is mounted where regular bleeding is impractical. The round gauge here reads in MPa; psi and bar scales are also available. NPT is the ordered thread option; PT is the catalogue standard and G (BSPP) is also offered. No bracket is fitted with this code - order a bracketed variant if you need panel or wall mounting. Because flow is published as curves rather than a single rated figure, send us your application details and we will confirm sizing against the datasheet 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 curves, not as a single rated figure, so there is no one number we can honestly quote. Send us your application - port size, expected demand and line pressure - and we will confirm the sizing from the datasheet curves before you order.
The M in the code selects the manual drain: an operator opens the bowl drain to expel collected water. It suits units mounted where someone passes regularly. If the unit sits in an inaccessible spot, the automatic (A) or differential-pressure (blank) drain variants discharge without operator action - those are separate order codes we can quote.
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.