The AirTAC GFR300C10ALJF2 AirTAC Filter Regulator PT3/8 Low-Pressure 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 GFR300C10ALJF2 is an AirTAC GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This size 300 unit is configured with a PT3/8 port, a 40 um standard filter element, an automatic drain that expels collected condensate without manual attention, and the low-pressure regulator type for applications that need reduced set pressures below the standard range. It ships as coded with a square gauge scaled in psi, no mounting bracket and no reverse/check valve. 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 options from 1/8 to 1 inch, a choice of automatic, manual or differential-pressure drain, 40 um standard or 5 um (W) filtration, gauge scale options, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm sizing and any datasheet figure against your application before ordering.
| Model | GFR300C10ALJF2 AirTAC Filter Regulator PT3/8 Low-Pressure |
|---|---|
| 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) |
Packaging machines with pneumatic clamping and bag-forming actuators often run at reduced set pressures. This unit filters the supply, drops the pressure in the low-pressure range, and its automatic drain keeps condensate out of the valve bank without daily attention.
A CNC machining centre's tool-change cylinders and pneumatic chucks need clean, regulated air at a stable reduced pressure. The 40 um element protects directional valves from particulate and the psi-scaled square gauge lets operators verify set pressure at a glance.
Bottling and filling lines drive grippers, stoppers and diverters with compressed air around the clock. A filter regulator at each drop conditions the air locally, and the automatic drain suits positions that are not checked every shift.
Size and port are the first decision: step up through 200, 300, 400 and 600 as your flow demand and pipe size grow - this unit sits at size 300 with a 3/8 inch PT port. Drain type matters in duty terms: automatic drain (as coded here) suits unattended or hard-to-reach installations, manual drain suits supervised points, and the differential-pressure default drains on a pressure drop. Filtration is 40 um standard; specify the W code for 5 um where downstream equipment needs finer protection. Gauge scale is selectable (MPa, psi or bar) - this configuration carries the embedded square gauge reading psi. Thread is PT as standard, with G (BSPP) and NPT available to order; brackets are optional and not included in this code.
One honest note on sizing: AirTAC publishes flow as curves, not a single rated figure, so we do not quote a flow number here. Send us your application details and we will confirm the correct size 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 series as curves, not as a single rated number, so we do not state a figure here. Tell us your application - working pressure, pipe size and the equipment being supplied - and we will confirm the correct size and the flow data from the datasheet on request.
The A in the code specifies the automatic drain: collected condensate is expelled from the bowl without anyone opening a valve, which suits installations that run unattended or are awkward to reach. The alternatives are the differential-pressure drain (the default, which drains on a pressure drop) and the manual M code for supervised drain points. All work within the same -5 to 70 C non-freezing temperature range.
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.