The AirTAC GFR30015ALF3WT AirTAC Filter Regulator NPT1/2, 5 um Auto 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 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 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This GFR30015ALF3WT configuration is built with a 1/2 in NPT port, a 5 um filter element (the 40 um standard element is the alternative), an automatic drain that expels collected condensate without manual attention, and the low-pressure regulator type for circuits that run below standard line pressure. It carries the embedded square gauge scaled in bar, includes a mounting bracket, and has no reverse (check) valve fitted. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). The 300-size bowl is polycarbonate (PC).
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options for drain type, filter grade, gauge style and scale, thread (PT standard, G and NPT to order) and bracket. Flow for this unit is published as a curve rather than a single rated figure, so ask us and we will confirm the datasheet flow data against your application before you order.
| Model | GFR30015ALF3WT AirTAC Filter Regulator NPT1/2, 5 um Auto |
|---|---|
| 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 | Low-pressure 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, 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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)). |
| L | Low-pressure 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) |
Feeding a bench pneumatic press or clamping fixture that runs below standard line pressure: the low-pressure regulator holds the setpoint while the 5 um element keeps water and debris out of the cylinder valves.
Air preparation for paint spray guns and low-pressure atomising setups, where the 5 um element protects the gun and the automatic drain keeps condensate out of the finish.
Supplying cylinders and diverters on a packaging conveyor, with the automatic drain handling condensate on a line that runs unattended through shifts.
When selecting in the GFR range, step up through sizes 200, 300, 400 and 600 as your flow demand and port size grow; this 300 unit takes a 1/2 in NPT port. Choose the drain to suit attendance: automatic (fitted here) for unattended condensate removal, manual for periodic draining, or the differential-pressure default. Pick the 5 um element (code W, fitted here) when downstream equipment needs finer filtration than the 40 um standard. Gauge options are the embedded square gauge (bar scale here) or an optional external round gauge with MPa, psi or bar scales. Thread is NPT on this code; PT is the standard thread and G is also an order option. Mounting bracket included. Flow is published as curves, not a single rating, so 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. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes GFR flow as performance curves rather than a single rated figure, so we do not quote a number here. Ask us and we will confirm the datasheet curve and check it against your required flow and port size before you order.
The L code selects the low-pressure regulator type, for circuits that run below standard line pressure; the exact adjustment range for the low-pressure type is not published, so we confirm it on request. The W code selects the 5 um filter element instead of the 40 um standard, for finer protection of downstream equipment.
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.