The AirTAC GFR300C10ALJF3WTK AirTAC Filter Regulator NPT3/8 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 GFR300C10ALJF3WTK is an AirTAC GFR300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries a 3/8 in NPT port, a 5 um filter element (code W), an automatic drain that discharges condensate without manual attention, and the low-pressure regulator type (L) for circuits set in a lower pressure band than the standard type - the exact adjustment range for the low-pressure type is not published in our sheet, so confirm it with us if your set pressure is critical. A square pressure gauge graduated in bar is fitted, a reverse/check valve (K) is included, the unit is supplied without a mounting bracket, and the bowl on this unit is metal. 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 port sizes from 1/8 to 1 in, and options across drain type (differential-pressure, automatic or manual), filter grade (40 um standard, 5 um with W), gauge scale (MPa, psi or bar), thread (PT standard, G or NPT to order), bracket, reverse/check valve and standard or low-pressure regulator type. AirTAC publishes flow for this family as curves rather than a single rated figure, so ask us to confirm sizing and any datasheet figure against your application before ordering.
| Model | GFR300C10ALJF3WTK AirTAC Filter Regulator NPT3/8 |
|---|---|
| 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 clamps and swing cylinders on an assembly fixture that works at a lower set pressure than the main shop air line delivers: the filter section strips water and particulate before they reach the valves and cylinders, and the automatic drain keeps the bowl clear between shifts.
Supplying air to a test bench or pilot-scale rig where the circuit is set in a low pressure band: the 5 um element protects sensitive instrumentation from condensate and fine particles, the square bar gauge gives a direct local pressure readout, and the check valve holds the set-up if supply is interrupted.
Point-of-use preparation for pneumatic actuators on a packaging or palletising line: water and particulate are removed at the machine, pressure is regulated down for the low-pressure zone, and the automatic drain removes accumulated condensate without an operator visiting the unit.
GFR300 sits in the middle of the GFR range: sizes step 200, 300, 400 and 600, and the port code here is 10, decoded as 3/8 in NPT. Step up or down a size as your line's air demand changes - and because AirTAC publishes flow as curves rather than one rated number, send us your flow and pressure conditions and we will confirm the correct size from the datasheet before you order. The remaining choices are all readable in the code: drain type (this unit is automatic, which clears condensate without operator attention; differential-pressure is the default and manual is also available), filter grade (40 um standard, 5 um with W for finer protection of downstream equipment), gauge scale (this unit reads in bar; MPa and psi scales are offered), thread (PT is the AirTAC standard, with G and NPT as order options - this unit is NPT), bracket (included by default, omitted with J, as here), the K reverse/check valve fitted on this unit, and the L low-pressure regulator type, whose exact adjustment range we will confirm on request.
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 G-series flow as performance curves, not as a single rated figure, so we do not quote a flow number for this unit. Send us your required flow and your inlet and outlet pressure conditions, and we will confirm from the datasheet whether GFR300 with a 3/8 in NPT port is correctly sized for your application before you order.
It marks the low-pressure regulator type. Like any GFR, this unit filters and regulates in one body, but the L variant is built for circuits set in a lower pressure band than the standard type. The exact adjustment range for the low-pressure type is not published in our sheet, so confirm it with us if your set pressure is critical; the maximum inlet pressure remains 1.0 MPa (145 psi).
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.