The AirTAC AirTAC GFR300-15 Filter Regulator G1/2, 5 um, Auto Drain 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 automatic 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 series combines water and particulate filtration with pressure regulation in a single body, so one unit both cleans the compressed air and sets a stable downstream pressure. This configuration is the size 300 unit with a G1/2 (BSPP) port, a 5 um filter element for finer particle capture than the standard 40 um grade, an automatic drain that expels collected condensate without manual attention, a round pressure gauge reading in psi, and no mounting bracket. The polycarbonate bowl suits this size, maximum inlet pressure is 1.0 MPa (145 psi), and the standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi).
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, gauge style and scale options, and PT (standard), G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | AirTAC GFR300-15 Filter Regulator G1/2, 5 um, Auto Drain |
|---|---|
| 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, 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". |
| A | Drain: Automatic 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. |
| J | Supplied without bracket. |
| (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. |
| 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) |
Feeds filtered, regulated air to the tool-change clamps and pneumatic actuators on a CNC cell, with the 5 um element guarding fine pilot valves and the automatic drain handling condensate on a machine that runs unattended shifts.
Prepares the air feeding cylinder-driven diverters, pushers and bag sealers on a packaging conveyor, holding a steady regulated pressure so cycle timing stays consistent while the psi gauge gives operators a visible setpoint.
Supplies cleaned, pressure-controlled air to a lab test bench running pneumatic fixtures and sample actuators, where the 5 um grade keeps fine control valves clear and the regulator dials the test pressure in psi.
Start with the port and size: this unit steps up to G1/2 on the size 300 body, which suits lines with higher air demand than the 1/4 in and 3/8 in sizes; match the size step to the flow your circuit needs and we will confirm the curve figures against your application. Choose the drain to suit access: automatic drain (as fitted here) suits installations that are not checked daily, manual drain suits attended stations, and the differential-pressure default drains on a pressure drop. Choose 40 um for general protection or 5 um (this unit) where finer particulate matters; note that a finer grade protects better but loads faster. The round psi gauge is fitted here; embedded square gauges and MPa or bar scales are alternatives. PT is the standard thread and G (BSPP) or NPT are order options, so specify the thread your pipework uses. Brackets are optional on this configuration. Because flow is published as curves rather than a single rated figure, 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. 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 GFR300 series as curves rather than a single rated figure, so we do not quote one number. Send us your application details and we will confirm the datasheet flow curves and sizing for this G1/2 unit on request before you order.
This configuration carries the A code, so the bowl drains collected condensate automatically without anyone opening it, which suits panels and machines that are not checked every day. The same GFR300 family is also available with manual drain or the differential-pressure default, and the regulator adjustment range differs by drain type: automatic and differential-pressure units adjust 0.15-0.9 MPa (20-130 psi), while manual-drain units adjust 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.