The AirTAC GFR300-10 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 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 GFR300-10 is a size 300 filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has 3/8 in NPT ports, a manual drain you operate by hand, the standard 40 um filter element, and a low-pressure regulator type. It is supplied with an embedded square gauge scaled in bar, a reverse/check valve fitted, and a mounting bracket. The polycarbonate bowl lets you see accumulated condensate at a glance.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with a choice of port sizes and PT, G or NPT threads, differential-pressure, automatic or manual drains, a 5 um element option (code W), and gauge scales in MPa, psi or bar. Flow figures for this series are published as curves rather than a single rating, so ask us to confirm the datasheet and sizing for your application.
| Model | GFR300-10 AirTAC Filter Regulator NPT3/8 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 40 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, bar 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". |
| 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 3 | Gauge scale: bar. 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) |
Filtered, regulated air for the pneumatic cylinders that drive case sealers, carton closers and product pushers on a packaging conveyor, with the low-pressure setting suiting light clamping and sorting duties.
Clean, low-pressure air for bench-top test rigs, sample handling fixtures and small pneumatic tools in a lab or pilot line, where the manual drain is emptied as part of a daily check routine.
Point-of-use air preparation for looms and winding machines that run on low-pressure air jets and cylinders, with the check valve holding the downstream circuit against backflow.
Start with the port step: size 300 with 3/8 in NPT ports suits lines where the supply matches that connection, and larger sizes carry more flow - match the size to the air demand of the circuit. Choose the drain to suit access: this unit has a manual drain, so someone must open it periodically; automatic or differential-pressure drains suit unattended installations. The 40 um element is standard; specify the W code for the 5 um element where finer filtration is needed. Gauge scale (MPa, psi or bar - bar here) and thread (PT is the standard series thread; G and NPT are order options) are decodable choices, and the bracket is included on this unit. Note this is the low-pressure regulator type; its adjustment range is not published in the standard table, so confirm it with us. Flow is published as curves, not a single rating - ask us to confirm sizing against your application before ordering.
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 we do not quote a figure. Tell us your application and required flow and we will confirm the correct size from the datasheet on request before you order.
The M code in GFR300-10MLF3TK specifies a manual drain: condensate collects in the polycarbonate bowl and is released by hand. If the unit will be installed where regular draining is impractical, the same size is available with an automatic (A) or differential-pressure (blank) drain as a decodable order option.
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.