The AirTAC GFR300C10ALJF1TK 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.
The AirTAC GFR300C10ALJF1TK is a size 300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration has 3/8 in NPT ports, a 40 um standard filtration element, an automatic drain that ejects collected condensate without manual attention, and a metal bowl. The low-pressure regulator type is intended for circuits set well below standard line pressure, and the embedded square gauge reads outlet pressure in MPa. A reverse (check) valve is fitted, and this version is supplied without a mounting bracket.
This is a genuine AirTAC part in the GFR range, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of automatic, manual or differential-pressure drains, an optional 5 um element, gauge and scale choices, and G/NPT thread options to order. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300C10ALJF1TK 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) |
On a machining fixture or jig where workpieces must be held at a gentle, controlled pressure, this filter regulator cleans the supply air, holds the set point on the gauge and protects the clamping cylinders from surges with its fitted check valve.
Feeding a wrapper or cartoner's valve island, the unit strips water and 40 um particulate from the shop air, drops the pressure to the level the machine section was designed for, and its automatic drain keeps condensate out of the valves without operator attention.
Tapped off a 3/8 in drop from the main distribution line, the GFR300 gives a work cell its own filtered, regulated air supply, with the metal bowl and automatic drain handling moisture at the lowest point of the drop.
Size 300 with 3/8 in NPT ports suits lines whose flow demand sits in the middle of the G-series range; step up to size 400/600 or down to 200 depending on the flow curve for your consumption. The automatic drain is the right choice where the unit is mounted in a position that is awkward to reach or where condensate load is continuous; choose manual or differential-pressure drain codes if that suits your maintenance routine better. The 40 um element is the standard grade for general air preparation - specify the W code variant if your application needs 5 um filtration. This is the low-pressure regulator type, so confirm its set-point range against your circuit before ordering; the exact range for this variant is not published and we will confirm it on request. The fitted square gauge reads in MPa; psi and bar scales and an external round gauge are catalogue options. NPT is specified here, with G (BSPP) available as an order option, and brackets are optional - this code comes without one.
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 series as characteristic curves, not as a single rated figure, so we do not quote a number that could mislead your sizing. Send us your application's flow and pressure requirements and we will confirm the datasheet curve figures for this exact configuration before you order.
The A code in the model means the bowl drains collected condensate automatically, so it suits installations that are hard to reach or run continuously; manual and differential-pressure drain versions are available as separate codes. The L code marks the low-pressure regulator type, intended for circuits set below standard line pressure - its exact adjustment range is not published in the catalogue material we hold, so ask us to confirm it against your set point.
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.