The AirTAC GFR300C10ALJC2W AirTAC Filter Regulator PT3/8, 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 GFR300C10ALJC2W is an AirTAC GFR300 filter regulator: one body that removes water and particulate from compressed air and then regulates downstream pressure. This configuration is built for a 3/8 in PT port, carries the fine 5 um filter element (code W) instead of the standard 40 um, and drains condensate automatically, so the bowl empties itself without manual attention. It is the low-pressure type (code L) for circuits that run below standard regulator settings, it leaves the factory without a mounting bracket (code J), and it ships with a round external gauge reading in psi (code C2). 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 from the GFR filter-regulator family, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of automatic, manual or differential-pressure drains, 40 um or 5 um filtration, standard or low-pressure regulation, gauge and bracket options, and PT, G or NPT threads. AirTAC publishes flow for this family as curves rather than a single rated figure, so ask us and we will confirm the flow and datasheet figures for your application before you order.
| Model | GFR300C10ALJC2W AirTAC Filter Regulator PT3/8, 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. |
|---|---|
| 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 an assembly fixture that clamps with air held well below normal line pressure, this low-pressure-type filter regulator conditions the supply and holds the reduced setting, while the 5 um element protects the clamping cylinders' seals from particulate and the automatic drain keeps condensate out of the circuit.
Feeding a bank of directional control valves on a carton-forming packaging line, the unit strips water and fine particles ahead of the valves, regulates their supply pressure, and the fitted round psi gauge lets the line technician verify the setting at a glance without breaking into the circuit.
On a small machining cell where precision actuators and air bearings are intolerant of dirt and water, the 5 um filtration grade and automatic condensate drain keep the supply clean and dry, and the regulator sets the reduced pressure those devices need from the main 3/8 in PT drop.
Size 300 with a 3/8 in PT port sits in the middle of the GFR range: step up to size 400 or 600, or down to 200, if your line's flow demand points elsewhere - we can check the published flow curves against your consumption before you commit. This unit already carries the fine 5 um element (choose 40 um only if your downstream devices tolerate coarser air), an automatic drain (choose manual if you prefer controlled, attended draining, or differential-pressure for the default behaviour), and the low-pressure regulator type for circuits that never approach standard setting ranges; the exact setting span for the low-pressure type is not published, so confirm it with us. The round psi gauge is fitted here; the embedded square gauge with MPa, psi or bar scales is the alternative. PT is the standard thread and G (BSPP) or NPT are order options, and the J code means no mounting bracket is supplied - order a bracket separately if you panel-mount.
Because AirTAC publishes flow as curves rather than one rated number, we deliberately do not quote a flow figure here. Send us your application details and we will confirm sizing from 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 family as curves, not as a single rated number, so we do not quote a figure here. Tell us your application and air consumption and we will confirm the flow from the datasheet so you can size the unit correctly before ordering.
The L code means this GFR300 carries the low-pressure regulator variant rather than the standard one, intended for circuits that run at reduced pressures. The exact setting range for the low-pressure type is not published in the material we hold, so please confirm the range with us against your working pressure before ordering.
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.