The AirTAC GFR30010ALJC2GK AirTAC Filter Regulator 3/8 in 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 PT3/8" ports, a automatic 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 GFR300 series combines water and particulate filtration with pressure regulation in a single body, so one 3/8 in (G3/8) connection handles both jobs. This configuration is the low-pressure regulator type with an automatic drain that bleeds collected condensate from the PC (polycarbonate) bowl without manual attention, a 40 um standard filter element, a fitted reverse/check valve, and an external round gauge reading in psi. The bracket position is J, so no mounting bracket is included. Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating 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 sizes from 1/8 in to 1 in, and options include manual or differential-pressure drains, a 5 um element (code W), embedded square or external round gauges with MPa, psi or bar scales, G or NPT threads, and a mounting bracket. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR30010ALJC2GK AirTAC Filter Regulator 3/8 in Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (G (BSPP) thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, psi scale |
| Reflux valve | Fitted (reverse flow permitted) |
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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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. |
|---|---|
| 10 | Port size PT3/8". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| A | Drain: Automatic drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| G | G (BSPP) thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
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 · PT3/8" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
On a packaging conveyor, low-pressure air positions diverters, stoppers and pushers. One GFR unit at the drop cleans the supply of water and chips and holds the reduced pressure the actuators were set up for, with the automatic drain coping during multi-shift running.
Assembly fixtures with small clamping cylinders often run at reduced pressure to avoid distorting delicate parts. A filter regulator at the fixture inlet delivers clean, regulated air to the clamps, and the psi-scaled round gauge gives operators a visible setpoint.
Bench-scale reactors, sample handling rigs and pilot-plant skids fed from a shop-air drop need particulate- and water-free air at a gentle, stable pressure. The low-pressure regulator type and 40 um element suit these sensitive low-pressure circuits, with the check valve holding the setting if supply dips.
Start with the port step: size 300 carries a 3/8 in port, one step up from 1/4 in, so match it to the line size and the flow your circuit needs. Choose the drain to suit access: this unit has an automatic drain, which suits installations that are not checked daily; manual and differential-pressure drains are available on other codes. The 40 um element is the standard grade; specify code W if the application needs 5 um filtration. This code carries an external round gauge with a psi scale; embedded square gauges and MPa or bar scales are alternatives. Thread here is G (BSPP); PT is the standard thread and G or NPT are order options. This code has no mounting bracket (code J), so plan the mounting accordingly.
Because flow is published as curves and not as a single rated number, ask us to confirm sizing against your application before ordering. The low-pressure regulator type has a different adjustment range from the standard type, and we will confirm the exact range from the datasheet on request.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR300 series as curves, not as a single rated figure, so we do not quote a l/min or SCFM number. Send us your line pressure, working pressure and expected air demand, and we will confirm the sizing from the datasheet on request before you order.
The A in the code selects the automatic drain, which discharges collected condensate from the PC bowl without manual intervention - useful where the unit is mounted out of easy reach. C2 selects the external round gauge with a psi scale, in place of the standard embedded square gauge. The L marks the low-pressure regulator type, and J means no mounting bracket is included.
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.