The AirTAC GFR300-10G AirTAC Filter Regulator G3/8 Low-Pressure is a genuine G-series filter regulator: water separation, 40 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT3/8" ports, a differential-pressure 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 GFR300-10G is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration is the 300 size with a G3/8 (BSPP) port, the standard 40 um filter element, a differential-pressure drain that bleeds collected condensate automatically as flow passes through, and the low-pressure regulator type for circuits set well below standard working pressure. A square pressure gauge scaled in psi is fitted as standard, the polycarbonate bowl suits the 300 frame, and the mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600, with port options from 1/8 to 1 inch, a 5 um element (code W), automatic or manual drain variants, gauge scale choices, and G or NPT thread options to order. Flow is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR300-10G AirTAC Filter Regulator G3/8 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (G (BSPP) thread) |
| Filtering grade | 40 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 | Differential-pressure 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". |
| (blank) | Drain: Differential-pressure 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. |
| (blank) | Mounting bracket included. |
| (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. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Point-of-use conditioning ahead of a machining centre's pneumatic tool clamps and chip-sweep cylinders: the element strips water and swarf-laden particulate from the shop-air drop while the regulator holds a steady set pressure to the machine's valve stack.
Feeding the flap-tuck and tape-head cylinders on a carton-sealing station, where the low-pressure regulator type suits a circuit deliberately run at reduced set pressure and the differential-pressure drain keeps condensate off the sealing actuators.
Conditioning the compressed-air bench feed in a test laboratory: the 40 um element protects sensitive air-bearing fixtures and pneumatic controls from water and dirt, and the psi-scaled gauge gives operators a direct readout of the regulated set point.
Start with the port step: the 300 size carries 3/8 inch ports, so match it to your line size and the flow curve rather than to a single rating - we confirm curve figures on request before you order. Choose the drain: this unit uses the differential-pressure drain, while automatic (A) and manual (M) variants exist if your duty or access needs them. The standard element is 40 um; specify the W code for 5 um where finer filtration is needed. The fitted square gauge here reads in psi; MPa and bar scales are alternatives, and an external round gauge is optional. Thread: PT is the AirTAC standard, with G (this unit) and NPT available as order options. The bracket is included on this code; J codes omit it. Note this is the L low-pressure regulator type - if your circuit needs the full standard adjustment span, ask us to confirm the right variant.
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 GFR series as curves, not as a single rated figure, so we do not quote a number here. Tell us your line pressure, set pressure and expected air demand, and we will confirm the flow curve and sizing from the datasheet on request before you order.
The L in GFR300-10LF2G marks the low-pressure regulator variant, intended for circuits held at reduced set pressures below the standard type's span. The exact adjustment range for the low-pressure type is not published in the material we hold, so contact us and we will confirm it from the datasheet. The fitted square gauge reads the downstream set point in psi.
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.