The AirTAC GFR300-15 AirTAC Filter Regulator PT1/2, 40 um, psi 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 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 holds downstream pressure steady in a single body, adjustable across the 0.15-0.9 MPa (20-130 psi) range. This 300-size unit is threaded PT1/2 (1/2 in), carries the standard 40 um filter element, drains condensate by differential pressure, and is fitted with an external round gauge scaled in psi plus a reverse (check) valve. Mounting bracket included.
This is a genuine AirTAC part from the GFR series, which spans sizes 200 to 600 with ports from 1/8 to 1 in, PT, G or NPT threads, manual, automatic or differential-pressure drains, and 40 um or 5 um (W) elements. Maximum inlet pressure is 1.0 MPa (145 psi); working temperature is -5 to 70 C, non-freezing. The polycarbonate bowl suits general plant air. Flow is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application.
| Model | GFR300-15 AirTAC Filter Regulator PT1/2, 40 um, psi Gauge |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, psi 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 0.15 - 0.9 MPa (20 - 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. |
|---|---|
| 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)). |
| (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. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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 impact wrenches and nutrunners at assembly stations, where the GFR300-15 cleans the shop air and holds a steady regulated supply to each tool outlet on the drop line.
Supplying the tool-changer, clamping and chip-clearing circuits on a machining centre, with the 40 um element protecting valves from particulate and the regulator holding set pressure.
Driving pusher and divert cylinders on a bottling or carton-packing conveyor, where the check valve holds the downstream circuit against backflow and the drain keeps condensate out of the valves.
Choose the size by port and required flow: the 300 size here gives a PT1/2 connection, and larger sizes carry more flow - we can check the published flow curves against your demand before you order. The standard 40 um element suits general plant air; specify the W option for 5 um filtration. Drain choice is differential-pressure (as fitted here), automatic (A) or manual (M). Gauges are available embedded square or external round, scaled in MPa, psi or bar - this unit has a round psi gauge. Thread is PT as standard with G (BSPP) and NPT as order options, and a bracket is included. Because flow is published as curves, not a single rating, ask us to confirm sizing against the 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 this series as curves rather than a single rated figure, so we do not quote a number here. Send us your air demand and working pressure and we will confirm sizing from the datasheet on request before you order.
C is the external round gauge, 2 is the psi scale, and K means a reverse (check) valve is fitted. The blank positions are the defaults: standard regulator type, 40 um filter element and a differential-pressure drain, with the bracket included.
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.