The AirTAC GFR300C10ALJF2T AirTAC Filter Regulator NPT3/8 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.
GFR300C10ALJF2T is an AirTAC GFR300 filter regulator: one body that removes water and particulate from compressed air and then regulates the downstream pressure. This configuration is size 300 with a 3/8 in NPT port, the low-pressure regulator type, the 40 um standard filter element, an automatic drain that ejects collected condensate without manual attention, an embedded square gauge reading in psi, and no mounting bracket. The polycarbonate bowl suits the non-freezing -5 to 70 C operating range, and maximum inlet pressure is 1.0 MPa (145 psi).
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), a 5 um filter option (code W), gauge and scale choices, and G/NPT thread options alongside the PT standard. AirTAC publishes flow only as curves rather than a single rated figure, so we confirm flow and other datasheet figures for your application on request.
| Model | GFR300C10ALJF2T AirTAC Filter Regulator NPT3/8 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) |
Feeding low-pressure air to the flap-fold and taping cylinders of a carton sealer, where the regulator holds a gentle setpoint and the automatic drain keeps condensate out of the actuator circuit between shifts.
Regulating supply to swing clamps and support rests on a machining-cell fixture, with the 40 um element screening particulate from the clamp valves and the square psi gauge giving the setter a visible setpoint.
Supplying low-pressure air knives that strip rinse water from bottles on a filling line, with the filter section protecting the nozzle ring from debris and the automatic drain handling the moisture load unattended.
Choose the size 300 / 3/8 in step against the flow your line actually needs; AirTAC publishes flow as curves rather than a single rating, so send us your demand and we will confirm the fit before you order. This unit is the low-pressure type, selected when the regulated setpoint sits below the standard range - the exact range for the low-pressure version is not published, so confirm it with us. The automatic drain (code A) suits unattended duty; manual (M) and differential-pressure (blank) drain codes are alternatives. The filter grade here is the 40 um standard element; specify W for 5 um. The fitted square gauge reads psi, with MPa and bar scales available, and the trailing T orders NPT threading where PT is the catalogue standard and G (BSPP) is also offered. This code carries no bracket.
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 GFR300 flow as curves rather than a single rated figure, so there is no one rated flow number to quote for this unit. Send us your inlet pressure and the air demand of your equipment and we will confirm the sizing against the datasheet curves before you order.
The A in this code fits the automatic drain, which ejects collected condensate from the polycarbonate bowl without anyone opening it - useful on unattended or hard-to-reach installations. Manual (M) and differential-pressure (blank) drain codes are available if you prefer a different regime; ask us to quote the alternative code.
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.