The AirTAC GFR300-15 AirTAC Filter Regulator NPT1/2 5um Manual 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 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 at your setpoint in a single body. This configuration carries a 1/2 in NPT port, a 5 um filter element, a manual drain on the PC (polycarbonate) bowl, and an embedded square gauge scaled in MPa. The standard regulator covers 0.05-0.9 MPa (7-130 psi) with manual drain, maximum inlet pressure is 1.0 MPa (145 psi), and the operating temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part from the GFR300 series. GFR filter regulators are available in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, filter grades of 40 um (standard) or 5 um (code W), differential-pressure, automatic or manual drains, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm datasheet figures for your application.
| Model | GFR300-15 AirTAC Filter Regulator NPT1/2 5um Manual Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, MPa 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 0.05 - 0.9 MPa (7 - 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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) |
Feeding cylinders and grippers on a carton-forming conveyor: the 5 um element protects directional valve seals from particulate and water, while the regulator holds a steady setpoint for consistent stroke timing.
Supplying pneumatic clamps and swing cylinders on a machining center, where the 1/2 in NPT port suits higher-draw clamp circuits and the square MPa gauge lets the setter verify clamp pressure at a glance.
Regulating feed air to torque screwdrivers and impact tools at a bench assembly station, with the 5 um grade keeping water and debris out of tool motors and the manual drain suited to a station checked each shift.
Size and port step up with demand: this 300-size unit carries a 1/2 in NPT port; step to 400 or 600 for larger circuits or down to 200 for compact ones. Drain choice matters: a manual drain like this one is emptied by hand, while automatic and differential-pressure drains discharge condensate without attention. Filter grade is 40 um standard; the W code gives the finer 5 um element fitted here. Gauges come as embedded square or optional external round, with MPa, psi or bar scales; threads are PT (standard), G or NPT; brackets are optional. Flow is published as curves, not a single rating, so send us your flow and pressure requirements and we will confirm sizing against the datasheet 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 this series as curves rather than a single rated figure, so we do not quote one number. Tell us your flow and working pressure and we will confirm the sizing from the datasheet on request before you order.
The M code in GFR30015MJF1WT specifies a manual drain: condensate collected in the PC bowl is released by opening the drain valve by hand, so the unit suits lines that are checked regularly. The GFR family also offers automatic and differential-pressure drains if unattended discharge is preferred.
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.