The AirTAC GFR300C10ALJC2GK AirTAC Filter Regulator G3/8, 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 AirTAC GFR300C10ALJC2GK is a GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. Compressed air enters through the G3/8 (3/8 in) port, passes a 40 um filter element, and is regulated by the low-pressure type regulator. This configuration is fitted with an automatic drain, a round gauge with a psi scale, and a reverse (check) valve, and is supplied without a mounting bracket. 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 ports from 1/8 to 1 in, drain choices (differential-pressure, automatic or manual), 40 um standard or 5 um (W) filtration, embedded square or external round gauges with MPa, psi or bar scales, and PT (standard), G or NPT threads to order. Flow is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application.
| Model | GFR300C10ALJC2GK AirTAC Filter Regulator G3/8, 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) |
On a light-duty pneumatic press or clamping fixture running at reduced pressure, this filter regulator cleans the shop air to 40 um and holds a low regulated setting, with the psi gauge giving the operator a direct readout at the machine.
Feeding cylinders and air actuators along a packaging or cartoning conveyor, the unit strips water and pipe scale before regulation, and the automatic drain keeps condensate out of the line without an operator visiting the drop.
For bench-top lab automation, sample handling and small test-rig actuators that need clean, low-pressure air, the 40 um filtration and low-pressure regulation protect sensitive devices, while the check valve holds the downstream circuit if supply pressure dips.
Step up or down through the GFR sizes (200/300/400/600) and their port sizes (1/8 to 1 in) to match the air demand of the circuit; the 300 size with its 3/8 in port sits in the middle of the range. This unit is the low-pressure (L) type, chosen where the regulated pressure must stay well below the standard range - confirm the exact setting window with us before ordering, as it is not published for this variant. The automatic drain (A) ejects collected condensate without daily manual attention, which suits unmanned or hard-to-reach installations; a manual or differential-pressure drain is available if you prefer. The 40 um element is the standard grade; specify W for 5 um where finer particulate removal is needed. The round gauge here reads in psi; square embedded gauges and MPa or bar scales are alternatives. Thread is G, with PT as the standard and NPT available to order, and this unit comes without a bracket (J). Flow is published as curves, not a single rating, so ask us to confirm sizing 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 the GFR series as curves rather than a single rated figure, so we do not quote one number here. Tell us your inlet pressure, regulated pressure and air demand, and we will confirm the flow from the datasheet curves for this exact model before you order.
In the model code, A is the automatic drain, which ejects collected condensate on its own instead of waiting for a manual twist, and C2 is the external round gauge with a psi scale. If you would rather read bar or MPa, or prefer the embedded square gauge, those are alternative catalogue options in the same size.
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.