The AirTAC GFR300C15AF3TK AirTAC Filter Regulator NPT1/2 Square Gauge 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 See datasheet ports, a differential-pressure 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 GFR300C15AF3TK is a 300-size filter regulator that removes water and particulate from compressed air and holds downstream pressure in a single body. This configuration is threaded NPT1/2 (1/2 in), carries a 40 um standard filter element, and drains condensate automatically, so the bowl empties itself while the line runs. The fitted square pressure gauge reads in bar, and the built-in reverse (check) valve holds upstream conditions if supply is interrupted. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulation range is 0.15-0.9 MPa (20-130 psi), and the unit operates from -5 to 70 C in non-freezing conditions. The polycarbonate bowl suits general indoor compressed-air service.
This is a genuine AirTAC part. The GFR family is offered in sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, a choice of PT, G or NPT thread, manual, automatic or differential-pressure drains, a 5 um (code W) element option, gauge scale choices, and an optional low-pressure regulator type. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300C15AF3TK AirTAC Filter Regulator NPT1/2 Square Gauge |
|---|---|
| Series | GFR300 filter regulator |
| Port size | See datasheet (PT 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — factory standard, Factory standard 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. |
|---|---|
| C1 | Port size See datasheet. This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure 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). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C1 (two-unit set) |
A 300-size filter regulator with a 1/2 in port conditions the air feeding a pneumatic press cylinder: the 40 um element stops scale and pipe debris reaching the valve stack, the regulator holds a steady setting for repeatable stroke force, and the automatic drain keeps water out of the die area without an operator stopping by.
On a bottling or carton line, diverter gates and pusher cylinders cycle thousands of times a shift. This unit, mounted at the line drop with its included bracket, filters the supply, regulates it to the gate manufacturer's setting, and the check valve helps hold the circuit stable when the main supply fluctuates.
At a shared assembly-station manifold in a general manufacturing plant, a 1/2 in NPT filter regulator is a common point-of-use conditioning unit. The bar-scale square gauge lets operators verify setting at a glance, and the automatic drain handles condensate on drops that are not blown down every shift.
Size and port set the capacity: the 300 size with a 1/2 in NPT port sits mid-range in the GFR line, one step above 1/4-3/8 in point-of-use units and below the 400 and 600 sizes for larger headers. Choose the drain to match maintenance reality: automatic drain (this unit) suits lines that run unattended; manual drain suits stations visited daily; differential-pressure drain is the catalogue default. The 40 um element is the standard grade; specify the 5 um W code if downstream equipment needs finer filtration. The embedded square gauge reading bar is fitted here, with MPa or psi scales and an external round gauge available as options. PT is the standard thread; G and NPT are order options, and this unit is supplied with NPT. A mounting bracket is included.
One honest note on sizing: AirTAC publishes flow as curves, not a single rated figure, so we will not quote you a flow number. Send us your application details and we will confirm the datasheet curve against your required flow before you order.
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 this series as curves, not as a single rated number, so we do not quote a flow figure. Send us your line pressure, downstream setting and required flow, and we will confirm the datasheet curve for this 300-size, 1/2 in unit against your application before you order.
The A in the code specifies an automatic drain: the bowl ejects condensate without manual attention, which suits unattended or hard-to-reach mounting points. The same GFR300-15 body is also available with a manual drain or the differential-pressure drain, and note that the drain type affects the regulator range: with automatic or differential-pressure drain the range is 0.15-0.9 MPa (20-130 psi), while the manual-drain version spans 0.05-0.9 MPa (7-130 psi).
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.