The AirTAC GFR300C08ALJF1WT AirTAC Filter Regulator NPT1/4 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 GFR300C08ALJF1WT is an AirTAC GFR300 filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure, fitted with 1/4 in NPT ports. This configuration carries the 5 um filter element (40 um is the series standard), an automatic drain that empties the metal bowl on its own, the low-pressure regulator variant, an embedded square gauge scaled in MPa, and no reverse/check valve or mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
It is a genuine AirTAC part. The GFR series runs from size 200 to 600 with ports from 1/8 to 1 in, PT, G or NPT threads, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um filtration, standard or low-pressure regulation, and gauge and bracket options. Rated flow is published as curves rather than a single figure, so ask us to confirm the datasheet and check the sizing for your application before ordering.
| Model | GFR300C08ALJF1WT AirTAC Filter Regulator NPT1/4 |
|---|---|
| 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) |
Filter and regulate the supply to clamp and hold cylinders on an assembly fixture, with the low-pressure regulator suiting circuits set well below full line pressure and the 5 um element protecting directional valve seats.
Feed bench-top test rigs and lab actuators from a 1/4 in drop, with the automatic drain keeping the metal bowl clear of condensate between runs and the MPa square gauge giving a readable setpoint.
Supply the small cylinders, air jets and gripper valves on a packaging or labelling conveyor with clean, regulated air taken off a 1/4 in branch of the main ring.
Choose the size step - 200, 300, 400 or 600 - to match the port and the flow your line needs; this unit is size 300 with 1/4 in NPT threads (PT is the standard thread and G or NPT are order options). For the regulator you pick standard or low-pressure type - this one is low-pressure, and its exact setpoint range is not published, so confirm it with us against your setpoint. Where a bowl is fitted you select differential-pressure, automatic or manual draining (automatic here), filtration is 40 um standard or 5 um with the W code (5 um fitted), the gauge is the embedded square type with MPa, psi or bar scales (MPa here), and a bracket is optional (none fitted). Flow is published as curves, not a single rating, so send your flow and pressure requirements and we will confirm the right size 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 G-series flow as curves rather than a single rated figure, so we do not quote a number here. Tell us your flow and working pressure and we will confirm the sizing from the datasheet on request.
This is the L low-pressure variant of the GFR300 regulator, and the catalogue does not publish its exact adjustment range. Send us your required setpoint and we will confirm on request whether it fits. The rest of the configuration - 1/4 in NPT ports, 5 um element, automatic drain, MPa square gauge - is as decoded 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.