The AirTAC GFR300C08LNWT AirTAC Filter Regulator NPT 1/4 in 5 um 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 GFR300C08LNWT is a size 300 filter regulator: it removes water and particulate from compressed air through a 5 um element and reduces pressure downstream, in one compact body. This configuration is the low-pressure regulator type (code L) with a metal bowl, differential-pressure drain, no gauge fitted, no reverse/check valve, and a mounting bracket included. The 1/4 in NPT port suits branch lines and individual machine drops. 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 is published in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, a choice of 40 um or 5 um filtration, differential-pressure, automatic or manual drains, gauge options and PT, G or NPT threads. Flow for the GFR300 is published as curves rather than a single rated figure, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR300C08LNWT AirTAC Filter Regulator NPT 1/4 in 5 um |
|---|---|
| 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. |
|---|---|
| C0 | 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-C0 (two-unit set) |
Feeding the gripper and small-cylinder circuit on a packaging machine pick-and-place head, where the 5 um element protects the directional valves and the low-pressure regulator type holds a reduced working pressure at the station.
Supplying the guide-rail positioning cylinders and reject pushers on a bottling conveyor, where a 1/4 in drop with clean, regulated low-pressure air keeps the adjusters consistent across the line.
Conditioning the air drop to spray guns in a small finishing shop, removing water and 5 um particulate before the gun while regulating a reduced, stable pressure for the finish.
Step up or down through the GFR sizes (200/300/400/600) and their matching ports (1/8 to 1 in) to suit the flow your line needs - the port on this unit is NPT 1/4 in. The 5 um element in this code is the finer of the two published grades (40 um is the standard); choose it where downstream valves and cylinders need cleaner air. Drain choice is differential-pressure (as here, the default), automatic (code A) or manual (code M). Gauge options are an embedded square gauge or an external round gauge with MPa, psi or bar scale - this unit carries none, so add a separate gauge if local indication is required. Thread is NPT here; PT is the standard thread and G (BSPP) is the other catalogue option to order. A bracket is included in this code (code J omits it). Flow 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. 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 GFR300 as curves rather than a single rated figure, so there is no one rated flow number we can quote. Tell us your application and required flow, and we will confirm the correct size and the datasheet curve figures for you on request.
The L marks the low-pressure regulator type, intended for applications working below standard regulating pressures; the exact setting range for this type is not published in the standard table, so we confirm it on request. This code also carries N (no gauge fitted) and W (5 um filter element), with a differential-pressure drain and NPT 1/4 in ports.
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.