The AirTAC GFR300-15 AirTAC Filter Regulator 1/2 in NPT is a genuine G-series filter regulator: water separation, 40 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 GFR300-15 is a size 300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has a 1/2 in NPT port, an automatic drain that expels collected condensate without manual attention, a 40 um standard filter element, and an embedded square gauge scaled in MPa so the set pressure is always visible. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi), and maximum inlet pressure is 1.0 MPa (145 psi).
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of PT, G (BSPP) or NPT thread, manual, automatic or differential-pressure drains, an optional 5 um element, and optional gauge scales in MPa, psi or bar. Flow is published as curves rather than a single rated figure, so we confirm the datasheet figures for your application on request.
| Model | GFR300-15 AirTAC Filter Regulator 1/2 in NPT |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 40 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, MPa 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". |
| A | Drain: Automatic 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. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Installed at the half-inch drop feeding a CNC machining cell, the unit strips water and chips-laden particulate from the header supply and holds a steady regulated pressure to the cell's air tools and clamps, with the automatic drain keeping the bowl clear through continuous shifts.
Mounted on the supply to pneumatic cylinders and diverters on a packaging conveyor line, it delivers clean, regulated air so cylinder stroke timing stays repeatable, while the MPa-scale gauge gives operators a visible setpoint at the line.
Fitted ahead of pneumatic valves and grippers on an automated laboratory or analytical instrument, the filter regulator conditions the building compressed air supply to a clean, controlled pressure the instrument's components can rely on.
Size 300 with a 1/2 in NPT port suits lines where moderate-to-high air demand meets a half-inch supply; step up to size 400 or 600 for larger flow, or down to 200 for compact circuits. The automatic drain on this unit keeps the bowl clear without operator attention - choose manual drain only where an operator can bleed the bowl on a schedule, or differential-pressure drain where you want draining tied to the pressure drop across the element. The 40 um element is the standard grade for general plant air; specify the W option (5 um) only where finer filtration is genuinely required. The square gauge is scaled in MPa here; psi and bar scales are order options, as is an external round gauge. PT is the standard thread; G (BSPP) and NPT are catalogue options ordered by suffix, and a mounting bracket is included with this unit.
Because flow is published as curves rather than a single rated number, 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 flow for the GFR series as curves, not as a single rated figure, so we do not quote a number here. Tell us your line pressure, set pressure and air demand, and we will confirm the sizing against the datasheet curves on request before you order.
The A in the code GFR30015AF1T specifies an automatic drain, which expels collected condensate from the bowl without operator attention - useful on unattended or continuous-duty lines. The catalogue also offers manual drain (code M) for scheduled bleeding and differential-pressure drain (blank) as the default. This unit is size 300, so its bowl is polycarbonate; only size 600 uses an aluminium alloy bowl.
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.