The AirTAC GFR300C15LF1WTK AirTAC Filter Regulator NPT1/2 Low-Pressure 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 GFR300C15LF1WTK is an AirTAC GFR filter regulator: a 5 um filter element and a pressure regulator combined in one body, with a differential-pressure drain and a metal bowl. This size 300 unit is ported NPT1/2, is the low-pressure regulator type (code L), and carries a built-in reverse/check valve (code K). A square pressure gauge scaled in MPa is fitted, and the mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part from the GFR300 series. GFR filter regulators are available in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, in PT (standard), G or NPT thread, with 40 um standard or 5 um (W) filtration, differential-pressure, automatic or manual drains, square or round gauges scaled in MPa, psi or bar, and an optional check valve. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR300C15LF1WTK AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| 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) |
Filtering and regulating supply air to an air-over-oil clamp on a machining fixture, where the circuit calls for the low-pressure regulator type rather than the standard version.
Supplying filtered, regulated air to carton-sealing and case-erector cylinders on a packaging line, with the 5 um element protecting downstream valve seals from particulate and water carryover.
Conditioning compressed air for laboratory apparatus that needs clean, regulated low-pressure air, with the built-in check valve blocking reverse flow back toward the supply.
Size and port are the first choice: the 200, 300, 400 and 600 series step up in port and flow capacity, so match the series to the air demand of the circuit - here the 300 size with a 1/2 in NPT port. Filter grade is 5 um on this unit (code W); the standard element is 40 um where finer filtration is not required. The drain is the differential-pressure default, with automatic (A) and manual (M) drains available as order options. Gauges are embedded square as standard with an optional external round gauge, scaled in MPa, psi or bar. Thread is NPT on this unit; PT is the standard thread and G (BSPP) is the alternative order option. A bracket is included and the J code deletes it. Flow is published as curves, not a single rated figure, so send us your application conditions and we will confirm sizing from the datasheet 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 GFR300 flow as curves rather than a single rated figure, so we do not quote a number here. Send us your application conditions and we will confirm the flow and the full datasheet figures for GFR300C15LF1WTK on request.
L marks the low-pressure regulator type, so this unit is set up for low-pressure regulation instead of the standard type. The exact adjustment range for the low-pressure version is not published in the standard datasheet, so we confirm it on request. The rest of the code reads: W is the 5 um filter element, T is the NPT thread, and K is the built-in 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.