The AirTAC GFR300C08LF3WT AirTAC Filter Regulator 1/4 in NPT 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 GFR300C08LF3WT is a GFR-series filter regulator: a water-and-particulate filter and a pressure regulator combined in one body, with a drain bowl but no lubricator. This unit is built on the size-300 body with 1/4 in NPT ports (PT is the standard thread; G and NPT are order options), a 5 um filter element (the W grade, against the 40 um standard), a differential-pressure drain, and the low-pressure regulator type. A square pressure gauge scaled in bar is fitted, the mounting bracket is included, and no reverse/check valve is fitted. 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. The GFR family spans sizes 200, 300, 400 and 600, with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, gauge scale in MPa, psi or bar, and G, NPT or PT threads. The size-300 bowl is polycarbonate; only the size-600 bowl is aluminium alloy. Flow for this series 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 | GFR300C08LF3WT AirTAC Filter Regulator 1/4 in NPT |
|---|---|
| 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) |
On fixture and jig clamping circuits that run at reduced pressure to avoid marking finished parts, this filter regulator cleans the air to 5 um and holds the set pressure, with the square bar gauge giving a direct reading at the machine.
Spray booths, coating heads and lab benches need clean, steady low-pressure air; the 5 um element and low-pressure regulator type suit these circuits, and the differential-pressure drain keeps the bowl clear without daily attention.
Packaging machines and conveyor diverters running light-duty cylinders at modest pressures get filtered, regulated air from this 1/4 in NPT unit, with the included bracket allowing mounting on the frame beside the machine.
Choose the size by the port and flow step: size 300 with 1/4 in NPT ports sits in the middle of the GFR range (200/300/400/600, ports 1/8 in to 1 in), so step up or down a size if your circuit needs more or less air. This unit carries the W code for the 5 um element - pick it when downstream valves, cylinders or instruments need finer filtration than the 40 um standard - and the differential-pressure drain bleeds the bowl automatically as the pressure differential builds, with no daily manual draining. The square gauge is scaled in bar; MPa and psi scales and an external round gauge are alternatives. The low-pressure (L) regulator type is intended for lower set pressures than the standard type - the exact adjustment range is not published in our data, so confirm it with us. Flow is published as curves, not a single rating: send us your flow and pressure requirements 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 rather than a single rated figure, so we do not quote a number here. Send us your required flow and working pressure and we will confirm the sizing from the datasheet on request.
The L code marks the low-pressure regulator variant, intended for lower set pressures than the standard GFR type. The exact adjustment range for this variant is not published in the data we hold, so ask us to confirm it against the datasheet; the rest of the decode - 1/4 in NPT ports, 5 um element, differential-pressure drain, square bar gauge - is as stated on this page.
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.