The AirTAC GFR30015ALC3WTK 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 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 GFR30015ALC3WTK is a GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in one body. This 300-size unit is configured with 1/2 in NPT ports, a fine 5 um filter element (code W, in place of the 40 um standard), an automatic drain that expels collected condensate without manual attention, and the low-pressure regulator type (code L) for circuits running at reduced pressure. It is fitted with a round pressure gauge reading in bar, a reverse/check valve (code K) in the supply path, and includes a mounting bracket. Maximum working (inlet) pressure is 1.0 MPa (145 psi); operating temperature is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR filter-regulator family is published in sizes 200, 300, 400 and 600, with port options from 1/8 in to 1 in, PT as the standard thread and G or NPT as order options, a choice of 40 um or 5 um filtration, differential-pressure, automatic or manual drains, standard or low-pressure regulator types, and gauge or no-gauge variants. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR30015ALC3WTK 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 | 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 — 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. 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). |
| 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) |
Feeding the air cylinders on a packaging machine's case-forming and sealing stations: the 5 um element keeps seal wear particles and pipe scale out of valve spools, and the automatic drain clears condensate from a line that runs all shift without an operator having to bleed the bowl.
Regulating supply to air-atomising spray guns and coating heads that run at reduced pressure: the low-pressure type (L) regulator variant is intended for exactly this kind of circuit, while the 5 um element helps keep the atomising air clean and the automatic drain handles compressor moisture.
Conditioning air to a robotic gripper and pick-and-place module: the fitted reverse/check valve sits in the supply path, the round bar gauge lets a technician read set pressure at a glance, and the included bracket makes panel mounting inside the cell straightforward.
Sizing a GFR unit starts with the size/port step: 200, 300, 400 or 600, each stepping up in port and flow capacity, so match the size to the air demand of the circuit rather than only to the existing pipe thread. This model is already fixed at 300 size with 1/2 in NPT ports. The 5 um element (W) suits circuits with sensitive downstream components; the 40 um standard element suits general supply duty. The automatic drain here is the right choice where the unit is mounted in a position that is awkward to reach or where condensate loads are continuous; manual and differential-pressure drains are the alternatives across the family. The low-pressure type (L) regulator variant is intended for circuits running at reduced pressure - the exact adjustment range for this variant is not published in our sheet, so confirm it with us. Gauge scale (MPa, psi or bar), thread (PT standard, G or NPT to order) and bracket options can all be specified on sibling codes.
One honest note on sizing: AirTAC publishes filter-regulator flow as curves, not as a single rated number, so we cannot quote a rated flow figure here. Ask us to confirm the flow curve and datasheet figures 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 filter-regulator flow as curves rather than as a single rated figure, so we do not quote a rated flow, Cv or l/min number for this unit. Tell us your application and operating conditions and we will confirm the flow curve and datasheet figures for this exact model on request before you order.
The L code marks the low-pressure regulator variant of the GFR series, intended for circuits that operate at reduced pressure rather than the standard type. The exact adjustment range for this low-pressure variant is not published in the catalogue sheet we work from, so please confirm the set-pressure window you need with us and we will verify it against the datasheet. Everything else in the code decodes normally: 300 size, 1/2 in NPT ports, 5 um element, automatic drain, round bar gauge, check valve fitted and bracket included.
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.