The AirTAC GFR300-10T AirTAC Filter Regulator NPT3/8 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 GFR300-10T is a low-pressure filter regulator: one body that removes water and particulate from compressed air and holds downstream pressure steady, in a single 300-size unit. This configuration carries a 3/8 in NPT port, the standard 40 um filter element, a differential-pressure drain that bleeds collected condensate automatically when flow runs, a round pressure gauge scaled in MPa, and a built-in reverse (check) valve. It is supplied without a mounting bracket, so plan to bolt it directly into the line or to your own bracketry. As a low-pressure (L) type, it is intended for circuits that run below the standard regulator band.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with a choice of PT, G or NPT thread, manual, automatic or differential-pressure drains, a 5 um (W) element where finer filtration is needed, square or round gauges in MPa, psi or bar scales, and bracket options. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR300-10T AirTAC Filter Regulator NPT3/8 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT 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 — 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. |
|---|---|
| 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. |
| 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. |
| (blank) | Filtering grade 40 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 · PT3/8" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Mounted ahead of a fixture's clamp cylinders on a CNC cell, the unit strips condensate and chips-laden particulate from the shop air and holds a steady, lower clamping pressure so parts seat consistently cycle after cycle. The check valve holds the set pressure if supply dips mid-cycle.
Feeding the air jets and hold-down cylinders on a carton-sealing conveyor, the filter regulator keeps moisture out of the jet nozzles and pins the line pressure for smooth product handling, while the differential-pressure drain handles condensate during long continuous runs.
On a pilot-scale process skid where sensors and pneumatic valves need clean, low-pressure air, the low-pressure regulator type and 40 um filtration protect the instrumentation, and the MPa gauge gives operators a clear local pressure reading at the panel.
Start with the port step: 300 size with a 3/8 in port sits in the middle of the GFR range, one step above 1/4 in and one below 1/2 in - match it to the line size and the flow your circuit needs, then let us verify against the published flow curves. This unit is the low-pressure (L) type, so choose it only where the working pressure stays in the lower band; standard GFR units cover the full 0.15-0.9 MPa adjustment range. The 40 um element is the standard grade; if the application needs finer particulate control, the 5 um (W) version is the option to order instead. Drain is differential-pressure, which suits continuously flowing lines; specify automatic (A) for idle lines or manual (M) where an operator drains on schedule. The round MPa gauge is fitted here; square gauges and psi or bar scales are alternatives. Thread is NPT on this code, with PT and G available as order options, and the J code means no bracket is included.
Flow for this family is published as curves, not a single rating, so we do not quote a number here. Send us your application details and we will confirm the datasheet figures and correct sizing 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 number, so there is no one figure we can honestly quote. Tell us your line pressure, downstream demand and duty cycle, and we will confirm the datasheet flow curve and check the 3/8 in, 300-size unit against your application before you order.
The L in the code marks the low-pressure regulator type, intended for circuits that run below the standard GFR adjustment band - the exact range for the low-pressure type is not published, so we confirm it on request. The K code means a reverse (check) valve is fitted: if upstream supply drops, it helps hold the pressure already set downstream instead of letting it bleed back through the unit.
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.