The AirTAC GFR300-10MLJF2WG AirTAC Filter Regulator G3/8 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 PT3/8" 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 GFR300-10MLJF2WG is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in one body. It removes water and particulate from compressed air through a 5 um element (the fine grade, code W, versus the standard 40 um) and regulates downstream pressure in a low-pressure configuration. This unit is built with a G3/8 port (3/8 in, G/BSPP thread), a manual drain bowl in polycarbonate, an embedded square gauge scaled in psi, and no mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). As a low-pressure type, its exact adjustment range is not published in the catalogue; we confirm it on request.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, and each size can be ordered with manual, automatic or differential-pressure drain, 40 um or 5 um filtration, standard or low-pressure regulation, square or round gauges in MPa, psi or bar scales, an optional reverse/check valve, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm flow and datasheet figures for your application.
| Model | GFR300-10MLJF2WG AirTAC Filter Regulator G3/8 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (G (BSPP) 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 | Not fitted |
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. |
|---|---|
| 10 | Port size PT3/8". 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. |
| G | G (BSPP) thread. PT is the default; G is BSPP and T is NPT. |
| (blank) | No reverse-flow valve (the default). |
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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Finishing lines running spray guns need clean, dry air held at a steady low setting; the 5 um element protects the finish from water and particulate while the low-pressure regulator holds the gun supply where the operator sets it.
Carton sealers and wrapper cylinders on a packaging line benefit from one body doing both jobs: the 5 um element keeps debris out of valve seats, and the low-pressure regulator keeps gentle clamp and push forces consistent.
Bench rigs that exercise low-pressure pneumatic devices need fine filtration upstream of sensitive instruments; the psi-scaled square gauge gives direct readout in the units the test sheet uses, with manual drain for controlled servicing.
Choose the GFR300 size step when your line sits in the 3/8 in port range; larger sizes carry larger ports and more flow, and the full 200-600 range is available if your demand grows. This configuration is already specified for fine 5 um filtration, manual draining, low-pressure regulation, a psi square gauge and G thread - if you need 40 um filtration, automatic or differential-pressure draining, an MPa or bar gauge, a reverse/check valve, a mounting bracket, or PT/NPT thread instead, those are orderable options within the same family. Note that flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering - and for the low-pressure type, request the exact adjustment range from us as well.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR300 as curves rather than a single rated figure, so we do not quote one number. Tell us your application and we will confirm the flow from the datasheet on request, along with the exact adjustment range for this low-pressure type.
A manual drain means an operator opens the bowl drain to expel collected water, which suits attended installations; automatic and differential-pressure drains are available as options if you prefer unattended draining. The 5 um element (code W) is the fine filtration grade, one step finer than the 40 um standard, chosen where downstream devices are sensitive to fine particulate.
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.