The AirTAC GFR300C10ALJC2K 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 AirTAC GFR300C10ALJC2K is a size 300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries a PT3/8 port with PT thread, a metal bowl with automatic drain, a 40 um standard filter element, and a low-pressure type regulator fitted with a round psi gauge. A reverse/check valve is built in, and the unit is supplied without a mounting bracket.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, and options that include manual or differential-pressure drains, a 5 um element (code W), square or 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 rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300C10ALJC2K 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) |
A machine shop can use this filter regulator to clean the shop air and hold a low, stable supply pressure to the clamping cylinders on a machining centre, with the check valve helping hold the circuit if supply dips.
On a beverage bottling line, the unit conditions the compressed air feeding grippers and gate actuators, the automatic drain clears accumulated condensate without operator attention, and the low-pressure regulator suits circuits that run below standard plant pressure.
A robot integrator can fit this unit at the air inlet of a pick-and-place cell so the vacuum and gripper cylinders receive filtered air at a regulated low pressure, with the round psi gauge giving operators a local reading.
Choose the size and port step against the air demand of the circuit: this unit is size 300 with a 3/8 inch PT port. Drain type is a real choice - automatic (as fitted here), manual, or differential-pressure - and the filter element is 40 um standard or 5 um with code W if finer filtration is needed. The gauge on this unit is the external round type with a psi scale; embedded square gauges with MPa, psi or bar scales are the standard alternative. Thread is PT as standard, with G (BSPP) and NPT available as order options, and a mounting bracket can be added if the J no-bracket specification does not suit your panel.
Note that this is the low-pressure type (code L): the exact adjustment range for this variant is not published in the material we hold, so confirm the set pressure you need with us before ordering. Because flow is published as curves and not as a single rated figure, send us your application details and we will confirm sizing against the datasheet.
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 performance curves rather than a single rated figure, so we do not quote a rated flow number. Send us your application conditions - supply pressure, downstream demand and allowable pressure drop - and we will confirm the sizing from the datasheet on request.
The L code means the regulator section is the low-pressure type rather than the standard type, suited to circuits that run at reduced supply pressure. The exact adjustment range for this variant is not published in the material we hold, so confirm your required set pressure with us before ordering. Everything else on this unit is standard decode: automatic drain, 40 um element, round psi gauge, PT3/8 port and a built-in check valve.
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.