The AirTAC GFR300-15F3WT AirTAC Filter Regulator NPT1/2, 5 um 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 GFR300-15F3WT is a 300-size filter regulator that removes water and particulate from compressed air and sets downstream pressure in a single body. This configuration carries a 1/2 in NPT port, a 5 um filtration element (the finer W grade, versus the standard 40 um), a differential-pressure drain that bleeds condensate automatically as flow passes through, an embedded square gauge scaled in bar, and a mounting bracket. The polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part. The GFR line runs from size 200 to 600 with port options from 1/8 in to 1 in and PT, G or NPT threads, with manual, automatic or differential-pressure drains and 40 um or 5 um elements. Maximum inlet pressure is 1.0 MPa (145 psi), operating temperature is -5 to 70 C (non-freezing), and the standard regulation range with this drain type is 0.15-0.9 MPa (20-130 psi). Flow is published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application.
| Model | GFR300-15F3WT AirTAC Filter Regulator NPT1/2, 5 um |
|---|---|
| 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 — square, bar 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. |
| 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. |
| (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) |
Filtering and regulating the shop-air feed to a CNC machine's pneumatic tool clamps and chip-clearing jets, with the 5 um element protecting fine spool valves from particles and the bar gauge giving the operator a direct setpoint readout.
Conditioning the air feeding the valve island on a carton-forming packaging line: water and grit are stripped out before they reach the directional valves, and pressure is held steady so sealing cylinders stroke consistently.
Supplying filtered, regulated air to the gate, stopper and pusher cylinders along a bottling conveyor, where the differential-pressure drain keeps condensate off the cylinder seals without an operator draining bowls each shift.
Size the unit by the flow your line needs: the 300 size here takes a 1/2 in port, and stepping up to 400 or 600 gives larger ports and more flow, while 200 covers smaller drops. This unit has the 5 um W element - choose it when downstream valves, cylinders or instruments need finer air than the standard 40 um grade; both grades share the same housing. The differential-pressure drain is the fit-and-forget choice: it vents condensate automatically as air flows, with no daily manual draining, while automatic (A) and manual (M) variants remain available in the family.
The embedded square gauge on this model is scaled in bar; MPa and psi scales and an external round gauge are alternatives in the range. The thread here is NPT (T code); PT is the catalogue standard and G (BSPP) is also orderable, so match your piping. A bracket is included for panel or wall fixing. Because flow is published as curves rather than one rated figure, send us your application details 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 the GFR300 as curves, not as a single rated figure, so we do not quote one number. Tell us your line pressure and the air demand of your equipment, and we will confirm the flow figures from the datasheet so you can size the unit correctly before ordering.
The W code in GFR300-15F3WT selects the optional 5 um filtration grade, which removes finer particles than the standard 40 um element. It is the right choice when the downstream valves, cylinders or instruments are sensitive to fine contamination; the standard 40 um grade is available in the same housing if your application does not need the finer air.
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.