The AirTAC GFR300-10 AirTAC Filter Regulator, NPT3/8, Bar Gauge 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 filter regulator: it removes water and particulate from compressed air and holds downstream pressure in one body. This 300-size unit is threaded NPT3/8 (3/8 in), has a manual drain on the polycarbonate bowl, a 40 um standard filter element, an embedded square gauge scaled in bar, and a reverse/check valve fitted. Maximum inlet pressure is 1.0 MPa (145 psi), the operating temperature range is -5 to 70 C (non-freezing), and the regulator adjusts from 0.05 to 0.9 MPa (7-130 psi).
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, PT (standard), G or NPT threads, manual, automatic or differential-pressure drains, 40 um or 5 um (W) elements, and a choice of gauge scales. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR300-10 AirTAC Filter Regulator, NPT3/8, Bar Gauge |
|---|---|
| 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 | 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 — 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. 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). |
| 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) |
Clean, regulated air at each workstation drop feeds impact wrenches, nutrunners and pneumatic cylinders, with the check valve holding set pressure if the supply dips.
Filtered and regulated air protects solenoid valves and pneumatic tool-changers on the machine's air preparation line, with the 40 um element catching pipe scale and condensate.
Regulated air drives the sealing cylinders and hold-down clamps on a carton sealing conveyor, keeping actuator speed consistent as the header pressure fluctuates.
The key decodable choices are size and port: 200, 300, 400 and 600 step up in port size and flow capacity, so match the port (here NPT3/8) to your air line. Drain type matters: manual (this unit) means draining the bowl by hand at service intervals, automatic drains condensate continuously, and differential-pressure drains discharge on pressure drop. Filter grade is 40 um standard; choose 5 um (code W) for finer protection. Gauges are embedded square as standard with optional external round gauges scaled in MPa, psi or bar; this unit's gauge is scaled in bar. Thread is PT as standard with G and NPT as order options - this unit is NPT. A mounting bracket is included. Flow is published as curves, not a single rating, so 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.
Flow for the GFR300-10 is published as curves rather than a single rated figure, so we do not quote a rated flow number. Send us your application details and we will confirm the correct size and the datasheet flow curve on request.
The M in the code GFR30010MF3TK means the polycarbonate bowl has a manual drain: condensate collects in the bowl and you drain it by hand at service intervals. If you prefer the bowl to drain itself, order the A code for an automatic drain; the blank default is differential-pressure draining.
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.