The AirTAC AirTAC GFR300-15G Filter Regulator G1/2, 5 um, psi Gauge 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 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 GFR300-15G is a genuine AirTAC filter regulator: one body that removes water and particulate from compressed air and then regulates downstream pressure. This configuration is the 300 size with a G1/2 (BSPP) port, a 5 um filter element (the finer W grade, versus the standard 40 um), a differential-pressure drain that bleeds condensate automatically as flow passes through, and an embedded square gauge reading in psi. The standard-type regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi), maximum inlet pressure is 1.0 MPa (145 psi), and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl includes a mounting bracket; a reverse/check valve is not fitted.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, plus choices of drain type, filter grade, gauge style and scale, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | AirTAC GFR300-15G Filter Regulator G1/2, 5 um, psi Gauge |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (G (BSPP) thread) |
| Filtering grade | 5 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 — square, psi 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 0.15 - 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). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| G | G (BSPP) 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 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Drops feeding a CNC machining cell get one unit that strips condensate and 5 um particles from the shop air and holds a steady regulated pressure to the machine's pneumatic valves and clamps.
On a packaging conveyor line, this filter regulator conditions the air feeding pick-and-place and carton-closing cylinders, with the psi gauge letting line staff set and verify working pressure at the drop.
At a spray booth, the 5 um element and differential drain clean moisture and grit out of the air before the gun, while the regulator lets the painter tune atomising pressure precisely at the wall drop.
Size up the GFR series by port and expected flow: 200, 300, 400 and 600 step up in both port size and capacity, so match the size step to the air demand of the circuit rather than the pipe alone. This unit is the 300 size with a G1/2 port. Drain choice matters: differential-pressure (as fitted here) drains with flow and needs no attention, automatic drains continuously, and manual drain requires periodic bleeding. Filter grade is 40 um standard or 5 um with the W code, as on this unit - choose 5 um where downstream equipment is more sensitive to particles and water carryover. Gauges are embedded square as standard with an optional external round gauge, in MPa, psi or bar scales. Thread is PT as the catalogue standard with G (BSPP) and NPT as order options; brackets are included.
One honest note on sizing: AirTAC publishes flow as curves, not a single rated number, so we cannot quote a rated flow figure. Send us your application details and we will confirm the datasheet and sizing before you order.
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 the GFR series as curves, not as a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Tell us your application and we will confirm the flow curve and datasheet figures on request so you can size the unit correctly before ordering.
The W code in GFR300-15F2WG selects the optional 5 um filter grade instead of the 40 um standard. Choose 5 um where downstream devices - precision valves, spray equipment, instrumentation - tolerate less particulate and water carryover; 40 um is the usual choice for general plant air. Both grades are available across the GFR sizes.
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.