The AirTAC AirTAC GFR300-10 Filter Regulator, 3/8 in NPT 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 AirTAC GFR300-10 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 3/8 in NPT, carries the fine 5 um filter element (the W grade, against the 40 um standard), uses a manual drain on the polycarbonate bowl, and is supplied with a round pressure gauge reading in MPa. The regulator is the standard type with an adjustment range of 0.05-0.9 MPa (7-130 psi), a mounting bracket is included, and maximum inlet pressure is 1.0 MPa (145 psi). Operating temperature is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family is offered in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of drain type, 40 um or 5 um filtration, gauge style and scale, and PT, G or NPT thread. Because flow is published only as curves rather than a single rated figure, we confirm the datasheet and flow figures for your application on request.
| Model | AirTAC GFR300-10 Filter Regulator, 3/8 in NPT |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 130 psi) |
| Pressure type | Standard 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 — round, MPa 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. Standard type, regulating 0.05 - 0.9 MPa (7 - 130 psi). 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)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (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. |
| 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. |
| (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) |
Feeds clean, regulated air to tool-changer cylinders and pneumatic clamps on a CNC machining centre, with the 5 um element protecting precision valves from particulate and the manual drain fitted into daily maintenance rounds.
Prepares air for the taping heads and box clamps of a carton-sealing machine, holding a steady regulated pressure so seal cylinders cycle consistently shift after shift.
Supplies filtered, regulated air to gripper and clamp actuators in a robotic welding cell, where the included bracket allows tidy mounting beside the cell's air drop and the MPa gauge gives operators a local setpoint readout.
Size and port step up with flow demand: this unit is size 300 with a 3/8 in NPT port; step to 400 or 600 if your line needs more capacity, or down to 200 for compact points of use. The 5 um element (code W) suits instruments, valves and actuators that need cleaner air than the 40 um standard; the manual drain means an operator opens the bowl drain during checks rather than relying on an automatic or differential-pressure arrangement. The round gauge here reads in MPa; psi and bar scales are catalogue options, as are PT and G threads if NPT does not match your piping, and the included bracket simplifies panel or wall mounting.
Flow for this family is published as curves, not a single rated number, so ask us to confirm sizing against your application and air consumption before ordering.
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 this family as curves rather than a single rated figure, so we do not quote a number here. Tell us your application and air demand and we will confirm the datasheet and flow-curve figures for the GFR300-10 on request before you order.
The M in the code specifies a manual drain: an operator opens the bowl drain during inspection, which suits lines with scheduled maintenance. AirTAC also offers automatic and differential-pressure drains on GFR units as catalogue options, and with a manual drain the regulator's adjustment range is 0.05-0.9 MPa (7-130 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.