The AirTAC GFR300C10LJNT AirTAC Filter Regulator 3/8 in NPT 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 GFR300C10LJNT is a GFR-series filter regulator: water-and-particulate filtration and pressure regulation combined in a single body. This 300-size unit is threaded 3/8 in NPT, carries the standard 40 um filter element, drains condensate by differential pressure, and is built as the low-pressure regulator type. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). No gauge is fitted (code N) and no mounting bracket is included (code J), so plan your panel or gauge arrangement accordingly.
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 options that include automatic or manual drains, a 5 um element (code W), built-in or external gauges, and PT, G or NPT threads. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm sizing and datasheet details for your application before ordering.
| Model | GFR300C10LJNT AirTAC Filter Regulator 3/8 in NPT |
|---|---|
| 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 CNC fixture circuit, this filter regulator supplies clamping cylinders with air stripped of water and particulate and held at the low pressure the clamp circuit calls for, with condensate carried away by the differential-pressure drain.
Carton-sealing and case-packing lines run many small cylinders off one air drop; this 300-size unit filters the supply and regulates it down to the low setting the actuators need, protecting seals and valves upstream of the machine.
Pneumatic valve positioners and pilots on a process skid need clean air at a stable low pressure; this filter regulator conditions the line at its 3/8 in NPT connection and drains accumulated water automatically by differential pressure.
Size is the main choice: GFR units step through 200, 300, 400 and 600, with larger sizes carrying larger ports and more flow, so match the size to your air demand. Within the family you can also choose the drain (differential-pressure as here, automatic with code A, or manual with code M), the filter grade (40 um standard, 5 um with W), a gauge with MPa, psi or bar scale, and the thread: PT is the standard, with G (BSPP) and NPT as order options - this unit is NPT. Code J means no bracket is supplied. One honest note on sizing: flow for this series is published as curves, not a single rated number, so send us your application details and we will confirm the right size before you order.
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 curves rather than a single rated figure, so we do not quote one number. Send us your application details and we will confirm the flow curve and correct sizing from the datasheet on request.
L marks the low-pressure regulator variant, intended for circuits that run below standard line pressure; the exact adjustment range for this variant is not published in our data, so confirm it with us before ordering. N means no gauge is fitted and J means no mounting bracket is supplied. The unit drains condensate by differential pressure and carries the standard 40 um element.
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.