The AirTAC GFR300-15T AirTAC Filter Regulator NPT1/2 Auto Drain 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 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 GFR300-15T is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady, in a single 300-size body with a 1/2 in NPT port. This configuration carries an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, an embedded square gauge reading in psi, and a built-in reverse (check) valve that holds downstream pressure if the supply side drops. It is supplied without a mounting bracket.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing). Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300-15T AirTAC Filter Regulator NPT1/2 Auto Drain |
|---|---|
| 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 | 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 — square, 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". |
| 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). |
| F | Gauge shape: Square. 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. |
| 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 clean, regulated air to the tool-change clamps and pneumatic actuators on a machining centre, where the check valve keeps clamp pressure held if the main supply dips mid-cycle.
Conditioning the air feed to carton-sealing and taping machines on a packaging line, with the automatic drain keeping condensate out of the cylinders on an unattended shift.
Supplying filtered, regulated air to the divertors, stoppers and pushers along a conveyor system, with the psi gauge giving operators a local setpoint readout at the station.
Size 300 with a 1/2 in port suits lines where moderate-to-high air delivery matters; step up to 400 or 600 for larger demand, or down to 200 for compact circuits. The automatic drain on this unit is the right choice when the bowl sits where nobody regularly checks it; choose manual or differential-pressure drain only if your maintenance routine suits it. The 40 um element is the standard grade for general plant air - specify the W option (5 um) only if downstream equipment needs finer filtration. The square gauge here reads in psi; MPa and bar scales are also available. The fitted check valve protects downstream pressure during supply dips, and the trailing T in the code means NPT threads - PT (standard) and G are the other order options. 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. 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 number, so we do not quote a figure here. Tell us your application and we will confirm the relevant flow data from the datasheet on request before you order.
The A in the code sets an automatic drain, which ejects collected condensate from the bowl without manual attention - useful where the unit is mounted out of easy reach. The K means a reverse (check) valve is fitted, holding downstream pressure if the supply side drops. The bowl on this 300-size unit is PC (polycarbonate); only size 600 uses aluminium alloy.
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.