The AirTAC GFR300-15T AirTAC Filter Regulator 1/2 in NPT, 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 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 GFR300-15T is a size-300 filter regulator: it removes water and particulate from compressed air and sets downstream pressure in one body. This configuration carries a 5 um filter element (the finer of the two catalogue grades), a manual drain on the PC bowl, an embedded square gauge scaled in bar, a reverse/check valve, and a mounting bracket. The 1/2 in NPT port suits main branch lines feeding multiple downstream devices.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, PT as standard thread and G or NPT as order options, manual, automatic or differential-pressure drains, 40 um or 5 um elements, and MPa, psi or bar gauge scales. Flow is published as curves rather than a single rating, so we confirm the datasheet figures for your application on request.
| Model | GFR300-15T AirTAC Filter Regulator 1/2 in NPT, 5 um |
|---|---|
| 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, 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 0.05 - 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. |
| (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. |
| 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) |
Feeding a bench pneumatic press or clamping fixture from a 1/2 in branch: the 5 um element keeps solenoid valves clean while the regulator holds the set clamping pressure and the check valve holds it if upstream supply dips.
A point-of-use station on a packaging line where cylinders and vacuum generators share one 1/2 in feed; the regulator sets line pressure for the machine and the manual drain lets the operator bleed accumulated water at shift start.
A drop feeding air tools and small actuators on an assembly line: filtration plus regulation in one body saves panel space, the bar-scaled square gauge gives operators a visible setpoint, and the bracket mounts the unit to the machine frame.
Step up or down the size ladder (200/300/400/600) to match the port and flow path your line needs; size 300 with a 1/2 in port is a common mid-range choice for branch supply. Choose the drain to suit access: manual drain means someone bleeds the bowl on a routine, automatic handles it unattended, and differential-pressure drains on a pressure drop. Pick 5 um (this unit) over the 40 um standard when downstream valves, cylinders or instruments want finer air; note the finer element loads faster and pairs naturally with a drain discipline you can maintain. Gauge scale is bar here - MPa and psi scales are available. Thread is NPT on this code; PT is the catalogue standard and G is also orderable. Bracket is included.
Because flow is published as curves and not a single rated figure, ask us to confirm sizing against your actual air demand 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 G-series flow as performance curves rather than a single rated number, so we do not quote a rated flow, Cv or SCFM figure. Tell us your application and required air demand and we will confirm the datasheet flow curve and sizing for this unit on request.
This code (M) has a manual drain: condensate collected in the PC bowl is released by hand. Choose manual where the unit is accessible and checked on a routine; choose automatic (code A) or differential-pressure (blank) when the unit is hard to reach or unattended. The manual-drain version also carries the wider 0.05-0.9 MPa (7-130 psi) regulation range.
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.