The AirTAC GFR300-15 AirTAC Filter Regulator NPT1/2 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 PT1/2" 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 GFR300-15 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This unit is built on the 300 size with 1/2 in NPT ports, carries the standard 40 um filter element, and drains collected condensate by differential pressure, so the bowl empties only when the pressure differential across the element calls for it. A round pressure gauge scaled in MPa is fitted, the regulator is the low-pressure type (its exact adjustment range is not published, so we confirm it on request), a reverse/check valve is fitted (code K), and the mounting bracket is included.
This is a genuine AirTAC part. The GFR series is offered in 200, 300, 400 and 600 sizes with ports from 1/8 to 1 in, and with catalogue choices of drain type, 40 um or 5 um filtration, gauge style and scale, PT, G or NPT thread, and bracket. Flow for the series is published as curves rather than a single rating, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR300-15 AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (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. |
|---|---|
| 15 | Port size PT1/2". 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). |
| 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 · PT1/2" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Feeding filtered, regulated air to pneumatic screwdrivers, clamps and cylinders at assembly benches, where the low-pressure regulator type suits stations that hold a lower set output.
Supplying clean air to diverters, pushers and gripper cylinders on a packaging conveyor, with the 40 um element protecting valves from water and particulate carryover.
Conditioning shop air for bench test rigs and small lab automation, where the fitted MPa gauge gives a local pressure readout and the check valve holds the downstream circuit.
Step through the sizes 200, 300, 400 and 600 - the port grows with the size, so match the step to the flow your line needs; because flow is published as curves, ask us to confirm the right size against your application. Where a bowl is fitted you choose differential-pressure drain (this unit), automatic drain (code A) or manual drain (code M). Filtration is 40 um standard or 5 um with code W. The gauge here is the external round type scaled in MPa; the embedded square gauge and psi or bar scales are the other catalogue options. Thread is NPT on this unit - PT is the standard and G (BSPP) is also an order option - and the mounting bracket is included.
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 figure, so we do not quote a number. Send us your required flow and working pressure and we will confirm the sizing against the datasheet before you order.
L marks the low-pressure regulator type; its exact adjustment range is not published in the sheet we work from, so we confirm it on request rather than quoting the standard-range figures. K means a reverse/check valve is fitted. The C1 in the code is the fitted round gauge scaled in MPa.
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.