The AirTAC GFR300C08ALJF2WT 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 AirTAC GFR300C08ALJF2WT is a low-pressure filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single 300-size body. This configuration is built with a 1/4 in NPT port, 5 um filtration (the finer of the two published grades), an automatic drain that ejects collected condensate without manual attention, and a metal bowl. An embedded square gauge with a psi scale is fitted so the set pressure is visible at the unit, and the maximum working (inlet) pressure is 1.0 MPa (145 psi) with an operating temperature range of -5 to 70 C, non-freezing. No mounting bracket is included and no reverse/check valve is fitted.
This is a genuine AirTAC part from the GFR filter-regulator family, which spans 200, 300, 400 and 600 sizes with port options from 1/8 to 1 in, a choice of differential-pressure, automatic or manual drains, 40 um standard or 5 um fine filtration, and PT, G or NPT threads. Because flow is published as curves rather than a single rated figure, we confirm flow and datasheet figures for your application on request.
| Model | GFR300C08ALJF2WT 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) |
Filtered, regulated air at a low set pressure feeding the directional valves and small cylinders on a carton or pouch packaging line, with the automatic drain handling condensate during continuous shifts.
Point-of-use air preparation for clamps and workholding fixtures on a CNC cell, where the 5 um element protects the clamp valves and the psi gauge lets the setter verify the holding pressure.
Clean, low-pressure regulated air for sample-handling actuators and pick-and-place heads on lab automation equipment, where fine filtration and a visible psi setpoint keep the process repeatable.
Size and port set the capacity: the 300 size with a 1/4 in port is the mid step of the GFR range, and larger sizes carry larger ports and more flow, so step up if your line demand grows. Drain type is a real choice here: automatic (as fitted) suits unattended duty, manual suits periodic checks, and differential-pressure drain is the catalogue default. Filtration is 5 um on this unit (40 um is the standard grade elsewhere in the range) - choose 5 um where downstream valves and instruments need cleaner air. The fitted square gauge reads in psi; MPa and bar scales are the other published options. PT is the standard thread, with G and NPT as order options - this unit is specified NPT. A bracket is optional (not fitted here).
One honest routing note: AirTAC publishes flow as curves, not a single rating, and the exact adjustment range of the low-pressure regulator type is not a published figure here. Ask us to confirm sizing and the regulator range 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 this family as curves, not as a single rated number, so we do not quote a figure here. Tell us your line demand and we will confirm the flow from the datasheet against your application on request.
The automatic drain ejects collected condensate on its own, so the bowl does not need manual draining between shifts - a good fit for unattended equipment. This unit is the low-pressure regulator type, intended for lower set pressures than the standard version; its exact adjustment range is not a published figure here, so we confirm it on request.
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.