The AirTAC GFR300C10ALJNWTK AirTAC Filter Regulator NPT3/8 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 GFR300C10ALJNWTK is a 300-size filter regulator: water and particulate removal plus pressure regulation in one body. This configuration is built for compressed-air lines that need clean air held at a low regulated setpoint. It has a 3/8 in NPT port, a fine 5 um filter element, an automatic drain that ejects collected condensate without manual attention, a metal bowl, and a fitted reverse/check valve that helps hold downstream pressure if the upstream supply dips. No gauge is fitted and no mounting bracket is included. 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 from the GFR300 series. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drains, standard 40 um or fine 5 um filtration, PT (standard), G or NPT threads, and gauge options. Flow is published as curves rather than a single rating, so ask us to confirm sizing or any datasheet figure for your application before ordering.
| Model | GFR300C10ALJNWTK AirTAC Filter Regulator NPT3/8 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) |
On a paint line, atomising nozzles need air filtered to 5 um and held at a low, stable pressure. This low-pressure-type filter regulator conditions the nozzle feed, and the automatic drain keeps condensate out of the finish without an operator walking the line.
Cylinders indexing cartons along a packaging conveyor need clean air at a modest setpoint. This unit filters and regulates the drop feed, while the fitted check valve holds downstream pressure through upstream dips so the stop-and-clamp sequence does not collapse mid-cycle.
Pneumatic actuators inside analytical and laboratory automation equipment are sensitive to particles and pressure drift. The 5 um element and low-pressure regulation suit the instrument's internal air header, and the 3/8 in NPT port drops straight into the machine's supply plumbing.
Start with the port step: this unit is 3/8 in NPT, one of the standard steps from 1/8 in up to 1 in across the GFR range - match it to your line size and let the flow curves, which we confirm on request, settle the final choice. This model carries the 5 um element (code W) rather than the 40 um standard, the automatic drain rather than manual or differential-pressure, and the low-pressure regulator type rather than standard - choose low-pressure when your setpoint sits at the bottom of the range; the exact set range for the low-pressure type is not published, so confirm it with us. The fitted check valve (code K) is worth specifying wherever a supply dip must not dump downstream pressure. Note what is not on this build: no gauge (code N) and no bracket (code J) - add a gauge separately if you need to read the downstream setting, and remember PT is the standard thread with G and NPT as order options.
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 GFR flow as curves, not as a single rated number, so we will not quote a figure that is not in the datasheet. Send us your line pressure, setpoint and expected air demand and we will confirm the sizing from the datasheet curves on request before you order.
The L code makes this a low-pressure regulator, intended for setpoints at the low end of the range; the exact set range for the low-pressure type is not published, so confirm it with us. Because code N means no gauge is fitted, you will need to add a gauge to read the downstream setting. Maximum inlet pressure is still 1.0 MPa (145 psi), and the 5 um element and automatic drain are already built in.
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.