The AirTAC GFR300-15AJC1WTK AirTAC Filter Regulator NPT 1/2 in 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 GFR300-15AJC1WTK is a filter regulator: water and particulate removal plus downstream pressure regulation in a single body. This size 300 unit is tapped 1/2 in NPT and is built with the 5 um filter element (code W) for finer filtration than the standard 40 um grade, an automatic drain that expels collected condensate without manual attention, a round pressure gauge scaled in MPa, and a reverse (check) valve fitted. The pressure setting is adjusted across 0.15-0.9 MPa (20-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi). The polycarbonate bowl suits non-freezing compressed-air service from -5 to 70 C.
This is a genuine AirTAC part. The GFR300 series is one of four sizes (200/300/400/600) with port sizes from 1/8 to 1 inch, and each can be ordered with a different drain type, filter grade, gauge style and scale, thread option (PT standard, G or NPT) and bracket choice. Flow figures for this series are published as curves rather than a single rating, so ask us to confirm the datasheet and sizing for your application.
| Model | GFR300-15AJC1WTK AirTAC Filter Regulator NPT 1/2 in |
|---|---|
| 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 | 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 — round, MPa 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 0.15 - 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 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) |
Clean, regulated air for the stopper and pusher cylinders that index bottles along a filling conveyor, with the 5 um element protecting tight-tolerance valve spools from water and fine carryover.
A stable set pressure for the air-over-oil or cylinder circuit of a small workshop press, where the automatic drain keeps condensate out of the supply between shifts.
Filtered, regulated air for quarter-turn pneumatic actuators on a water-treatment skid, with the check valve holding the set circuit against supply-side dips.
Choose the size and port step against the air demand of the circuit: this unit is size 300 with a 1/2 in NPT port; smaller or larger GFR sizes cover lighter or heavier demand. This configuration already carries the finer 5 um element (the standard grade is 40 um) and the automatic drain, which suits unattended installations; manual and differential-pressure drains are available if you prefer a different service regime. The round gauge here reads in MPa; square embedded gauges and psi or bar scales are the other catalogue choices. PT is the standard thread, with G (BSPP) and NPT as orderable options, and brackets are optional (this unit is ordered without one). Flow for this series 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as curves rather than a single rated figure, so we do not quote a l/min or SCFM number. Tell us your working pressure and air demand and we will confirm the flow curve and correct size from the datasheet on request.
Both are decode choices in the model code. A = automatic drain, which ejects collected condensate on its own instead of the differential-pressure default, and W = the optional 5 um filter element instead of the standard 40 um grade. The fitted round gauge is scaled in MPa, and the trailing K confirms a reverse (check) valve.
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.