The AirTAC GFR300C10LJC3WTK AirTAC Filter Regulator 3/8 NPT 5 um 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 GFR series combines water and particulate filtration with pressure regulation in a single body. This GFR300C10LJC3WTK is the 300 size with a 3/8 in NPT port, a 5 um filter element (code W) for finer filtration than the standard 40 um grade, a metal bowl with a differential-pressure drain, and the low-pressure regulator type. It is fitted with a round external gauge scaled in bar and a built-in reverse (check) valve, and is ordered without a mounting bracket. Maximum 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 ports from 1/8 to 1 in, and can be ordered with manual or automatic drains, a 40 um or 5 um element, embedded square or external round gauges in MPa, psi or bar scales, and PT, G (BSPP) or NPT threads. Because AirTAC publishes flow as curves rather than a single rated figure, ask us to confirm sizing and any datasheet figure for your application before ordering.
| Model | GFR300C10LJC3WTK AirTAC Filter Regulator 3/8 NPT 5 um |
|---|---|
| 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 a circuit on a packaging or assembly machine that runs below standard line pressure. The low-pressure regulator type in this GFR configuration is specified for exactly that duty, with the round bar gauge giving a direct reading at the setpoint.
Filtering and regulating the air feeding the pneumatic cylinders that index, stop and divert product on a conveyor line. The 5 um element helps keep water and fine particulate out of the directional valves downstream, and the check valve holds the regulated line against backflow.
Supplying filtered, regulated air to the clamping and actuation circuits of a CNC fixture. Stable regulated pressure from a single filter-regulator body keeps the clamp circuit simple, while the differential-pressure drain clears accumulated condensate as the element loads.
Step up through the GFR sizes 200, 300, 400 and 600 (ports 1/8 to 1 in) as your air demand grows; this unit is the 300 size with a 3/8 in NPT port. Because flow is published as curves rather than a single rating, send us your required flow and working pressure and we will confirm this size against the datasheet before you order. Choose the 5 um element (code W) when the air needs finer filtration than the standard 40 um grade. The differential-pressure drain on this unit bleeds the bowl automatically as pressure drops across the element; manual (M) and fully automatic (A) drains are catalogue alternatives. Gauges are embedded square or external round, scaled in MPa, psi or bar - this configuration carries the round gauge in bar. The low-pressure regulator type is selected where the circuit runs below standard line pressure; its adjustment range is not published in our data, so we confirm it on request. Thread here is NPT; PT is the standard thread and G (BSPP) is also a catalogue option. A mounting bracket can be specified if you need one - this unit is ordered without it.
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 the GFR series as curves rather than a single rated figure, so we do not quote a number here. Send us your required flow and working pressure and we will confirm from the datasheet whether the 300 size with its 3/8 in NPT port suits your application before you order.
It means a reverse (check) valve is fitted in this configuration. The same unit ordered without the K code is the standard version without the valve. If you are unsure whether your circuit needs one, describe the application and we will confirm the right configuration against the catalogue.
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.