The AirTAC GFR300C15ALJF3WTK AirTAC Filter Regulator NPT1/2 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 GFR300C15ALJF3WTK is an AirTAC GFR300 filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This configuration is built around a 1/2 in NPT port, a 5 um filter element (the finer of the two published grades), and an automatic drain that expels collected condensate from the metal bowl without manual attention. The regulator is the low-pressure type, the embedded square gauge is fitted with a bar scale, and a reverse/check valve is included; the unit comes without a mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options include the standard 40 um element, manual or differential-pressure drains, alternative gauge scales, and G or NPT threads in place of the PT standard. Because published flow data appears as curves rather than a single rated figure, we confirm flow and other datasheet figures for your application on request.
| Model | GFR300C15ALJF3WTK AirTAC Filter Regulator NPT1/2 |
|---|---|
| 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) |
Feeding clamp cylinders and light pneumatic presses that hold workpieces at a low set pressure - the low-pressure regulator type sets the holding force while the 5 um element keeps the actuation air clean.
Point-of-use conditioning for carton sealers, stretch wrappers and labeler cylinders on packaging lines, where the automatic drain handles condensate during continuous shifts without an operator stopping to drain a bowl.
Supplying diverters, stop gates and pusher cylinders along conveyor lines, with the reverse/check valve holding downstream pressure if upstream supply dips and the bar-scale gauge giving operators a visible setpoint.
Size 300 with a 1/2 in NPT port sits mid-range in the GFR line: step up to size 400 or 600, or down to 200, when the flow curve for your demand says so - we can check the curve against your consumption before you order. The 5 um element (code W) suits points of use that see finer contamination than the standard 40 um element is meant to handle. The automatic drain suits unattended duty; manual and differential-pressure drains are the alternatives on other configurations. The square gauge is fitted here with a bar scale (MPa and psi scales are the other options), and the low-pressure regulator type should be matched to a setpoint below the standard range - confirm the exact range with us. NPT is an order option on this unit; PT is the catalogue standard and G (BSPP) is also available. Brackets are optional and this configuration omits one.
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 a single rated number, so we do not quote a figure here. Send us your line pressure, set pressure and air consumption and we will confirm the flow from the datasheet for this exact configuration before you order.
The A in the code specifies an automatic drain, which expels collected condensate on its own - useful where the unit is mounted in a hard-to-reach spot or runs unattended. The GFR300 series is also catalogued with manual and differential-pressure drains; tell us which suits the installation and we will quote the matching code.
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.