The AirTAC GFR300C15LF3WT 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 GFR300C15LF3WT is an AirTAC GFR-series filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This 300-size unit is supplied with a 1/2 in NPT thread, the W-code 5 um filter element (finer than the 40 um standard grade), a differential-pressure drain, and the L-code low-pressure regulator type with an embedded square gauge scaled in bar. Max inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing. The metal bowl unit comes with a mounting bracket included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and can be ordered with manual or automatic drains, a 40 um or 5 um element, square or round gauges scaled in MPa, psi or bar, G (BSPP) or NPT threads, and with or without a bracket. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR300C15LF3WT 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) |
On a clamping or hold-down fixture that runs at reduced set pressure, this unit filters the shop air to 5 um and holds the downstream pressure steady ahead of the directional valve and clamp cylinders, with the bar-scale gauge giving the operator a direct set-point readout.
At the air-preparation point of a packaging line, the 1/2 in NPT connection feeds a manifold of small actuators: the element strips water and fine particulate before they reach the valves, while the regulator keeps the cylinder pressure consistent from cycle to cycle.
On a plant air drop serving assembly stations, this unit conditions the supply ahead of air tools and small actuators: the 5 um grade protects the tooling from condensate and fines, the low-pressure type suits circuits run below standard set pressures, and the differential-pressure drain handles settled condensate.
Pick the size by the port and flow step: 200 through 600, with ports from 1/8 in to 1 in - step up a size when your circuit needs more air at the regulator outlet. This unit is already specified with the 5 um element; the standard grade is 40 um if finer filtration is not required. Drain choices are differential-pressure (fitted here), automatic or manual. Note that this is the low-pressure regulator type: its exact regulation range is not published as a single figure, so confirm it against your set pressure with us before ordering.
Gauges come as the embedded square type (bar scale on this unit) or an optional external round gauge in MPa, psi or bar scales. PT is the standard thread; G (BSPP) and NPT are order options, and this unit is supplied NPT. A bracket is included. Flow is published as curves, not one rated number, so send us your application and we will confirm sizing against 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 flow for the GFR series as curves, not as a single rated figure, so we do not quote a number here. Send us your application details and we will confirm the datasheet flow curve and check the sizing against your required flow before you order.
L is the low-pressure regulator type, intended for circuits run below standard set pressures; its exact regulation range is not published, so confirm it with us against your set point. W is the 5 um filter element, one grade finer than the 40 um standard. This unit also carries a differential-pressure drain, an embedded square gauge scaled in bar, a 1/2 in NPT thread and an included bracket.
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.