The AirTAC AirTAC GFR300-15 Filter Regulator NPT1/2, 40 um 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 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 GFR300-15 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 300-size unit is supplied with 1/2 inch NPT ports, a manual drain bowl in polycarbonate, a 40 um standard filter element, an embedded square gauge scaled in psi, and a reverse/check valve fitted. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator adjusts from 0.05 to 0.9 MPa (7-130 psi), and the working temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, a choice of manual, automatic or differential-pressure drain, a 5 um element option, gauge scale options and PT, G or NPT threads. Flow is published as curves rather than a single rating, so we confirm the datasheet figures for your application on request.
| Model | AirTAC GFR300-15 Filter Regulator NPT1/2, 40 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 40 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, psi 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 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. |
| 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Feeds a bench-mounted pneumatic press where clean, dry air at a set pressure is needed for consistent forming and riveting strokes, with the check valve holding the set circuit against backflow.
Supplies regulated air to the flap-fold and taping cylinders of a carton-sealing conveyor, with the 40 um element protecting the valve spools from water and pipe scale.
Conditions the shop-air feed to a CNC machining centre's tool-changer and clamping circuits, where the psi-scaled gauge lets operators verify set pressure at a glance.
Size the GFR300-15 by matching the 1/2 inch NPT port and the 300 frame to the air consumption of the circuit; step up to size 400 or 600, or down to 200, if the porting does not match the line. Choose the drain type for the installation: manual drain (this unit) suits points where an operator can bleed the bowl, while automatic or differential-pressure drain suits unattended duty. The 40 um element is standard; specify the W code for a 5 um element where finer filtration is needed. Gauge scale (MPa, psi or bar), thread form (PT standard, G or NPT to order) and bracket inclusion are all selectable.
Flow for this family is published as curves, not as a single rated figure, 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR family as curves, not as a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the flow and datasheet figures for this unit on request before you order.
The M code in GFR30015MJF2TK specifies a manual drain bowl: an operator opens the drain to expel collected water. It suits attended installations. Where the unit runs unattended, the automatic (A) or differential-pressure (blank) drain option is the better decode choice.
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.