The AirTAC GFR300-15T AirTAC Filter Regulator NPT1/2 5um 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 GFR300-15T is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady, in a single body. This configuration is the size 300 unit with a 1/2 in NPT port, 5 um filtration (the finer W grade, versus the standard 40 um element), a differential-pressure drain that bleeds collected condensate automatically whenever the pressure drop across the element rises, and a reverse/check valve that holds downstream pressure if the upstream supply is lost. The fitted round gauge reads in bar, and a mounting bracket is included.
This is a genuine AirTAC part. The GFR family runs from size 200 to 600 with port sizes from 1/8 in to 1 in, in PT (standard), G and NPT threads, with a choice of drain type, filter grade, gauge style and scale. Maximum inlet pressure is 1.0 MPa (145 psi), the regulator adjusts from 0.15 to 0.9 MPa (20-130 psi), and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm sizing figures from the datasheet for your application.
| Model | GFR300-15T AirTAC Filter Regulator NPT1/2 5um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT 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 — round, bar 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. |
| 3 | Gauge scale: bar. 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. |
| 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" · 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 machining centre, with the 5 um element protecting close-tolerance valves from swarf-laden, wet shop air.
Sits at the drop feeding the diverters and pushers on a carton packaging conveyor, holding a steady working pressure so cylinder stroke timing stays repeatable through the shift.
Installed on the branch line serving looms and winding machines in a textile mill, where the check valve holds the circuit under pressure if the main supply dips and the drain copes with condensate from long runs.
Step up or down through the size 200/300/400/600 range against the flow your line needs - each size carries a larger port (here 1/2 in NPT) and more flow capacity, which we confirm from the published curves before you order. Choose the drain: differential-pressure (this unit, self-acting on pressure drop), automatic, or manual. Choose the element: 40 um standard or 5 um (W) where finer filtration is wanted - this unit carries the 5 um grade. Pick the gauge: embedded square as standard or external round, in MPa, psi or bar scales (this unit: round, bar). Add the K option for a reverse/check valve, and order PT (standard), G or NPT thread. A bracket can be included or omitted. Because flow is published as curves rather than a single rated figure, ask us to check the datasheet 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 GFR300 as characteristic curves rather than a single rated figure, so we do not quote one number. Tell us your line pressure, working pressure and approximate air demand, and we will confirm the sizing from the datasheet curves before you order.
K means a reverse/check valve is fitted: if upstream pressure is lost, the valve holds the downstream circuit so settings and loads are not dumped. The drain is the differential-pressure type - it vents collected condensate automatically whenever the pressure drop across the 5 um element rises, with no manual draining needed under normal duty.
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.