The AirTAC GFR30008MLJF2WTK AirTAC Filter Regulator NPT1/4 Low-Pressure 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 GFR30008MLJF2WTK is a 300-size filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is threaded NPT1/4 (1/4 in), carries a 5 um filter element (the finer of the two catalogue grades), and uses a manual drain, so the bowl is emptied by opening its drain valve during maintenance rounds. It is the low-pressure type, intended for circuits that run at reduced pressure settings, and its exact adjustment range is not published - we confirm it from the datasheet on request. An embedded square gauge with a psi scale is fitted so operators can read set pressure directly, and a reverse (check) valve is fitted to hold downstream pressure if the upstream supply is lost. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. The polycarbonate bowl is suited to standard shop-air environments; only the 600 size in this family uses an aluminium bowl. No mounting bracket is included in this version.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and each size can be ordered with your choice of drain type, filter grade, gauge scale, thread (PT standard; G and NPT as order options), bracket, and reverse valve. Flow figures for this family are published as curves rather than a single rated number, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR30008MLJF2WTK AirTAC Filter Regulator NPT1/4 Low-Pressure |
|---|---|
| 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 — square, 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). |
| F | Gauge shape: Square. 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. |
| 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) |
Feeds filtered, regulated air to the clamp cylinders of a carton-sealing or case-packing station where the circuit is designed to run at reduced pressure settings, with the psi gauge letting operators verify the set point at a glance.
Supplies the 5 um-filtered air that sample-preparation instruments and pneumatic lab actuators need, with the manual drain allowing the bowl to be emptied as part of a scheduled lab maintenance routine.
Regulates and filters the air feeding diverter arms, stop gates and pop-up rollers on a distribution conveyor line, with the check valve holding downstream pressure if the upstream supply drops.
Start with the port step: this unit is 300 size with a 1/4 in NPT port, which suits lines plumbed at 1/4 in; step up to 400 or 600 when the circuit carries more flow, and down to 200 for compact drops. Because rated flow is published only as curves, not a single number, ask us to confirm sizing against your application before ordering. Choose the drain to match maintenance practice: manual (this unit) empties the bowl on demand, automatic drains continuously without attention, and the differential-pressure default drains only when the pressure drop across the element calls for it. This unit already carries the 5 um element (code W); the standard grade is 40 um, so pick 5 um where downstream valves and instruments need finer protection. The fitted square gauge reads in psi; MPa and bar scales and an external round gauge are alternatives. Thread is NPT here - PT is the AirTAC standard and G (BSPP) is also an order option. No bracket is fitted in this version; bracketed versions are available.
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 family as curves rather than a single rated figure, so there is no one rated-flow number we can quote honestly. Tell us your line pressure and the flow your application needs and we will confirm the sizing from the datasheet curves before you order.
The M in the code sets a manual drain: the polycarbonate bowl is emptied by opening its drain valve during maintenance rounds, which suits lines that are checked daily. If the unit is mounted where nobody drains it routinely, order the automatic-drain (A) or differential-pressure (blank) variant of the same GFR300 1/4 in configuration instead.
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.