The AirTAC GFR300-10LJF1T 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 PT3/8" 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 GFR300-10LJF1T is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in one body. This configuration is the 300 size with a 3/8 in NPT thread, the low-pressure regulator type, a 40 um filter element, a differential-pressure drain, and an embedded square gauge scaled in MPa. No mounting bracket is fitted and no reverse/check valve. The polycarbonate bowl suits the 300 size (only size 600 uses an aluminium alloy bowl), 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 ports from 1/8 in to 1 in, drain choices (differential-pressure, automatic, manual), 40 um standard or 5 um (W) filtration, PT, G or NPT threads, gauge and bracket options. Flow figures are published as curves rather than a single rating, so ask us to confirm sizing and datasheet details for your application.
| Model | GFR300-10LJF1T AirTAC Filter Regulator NPT3/8 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure 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 — square, MPa 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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. |
|---|---|
| 10 | Port size PT3/8". 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)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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 · PT3/8" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Feeding low-pressure clamping cylinders on a metal-fabrication press: the 40 um element strips water and swarf-laden condensate from the shop air line while the low-pressure regulator holds a reduced, stable setting to the clamp valves.
Conditioning the air feeding pick-and-place and sealing cylinders on a carton packaging line: one body filters line moisture and particulate and regulates the supply pressure the machine's valve manifold receives.
Supplying the air cylinders that swing diverting gates between conveyor lanes in a bottling plant: filtered, regulated air at the gate station keeps gate stroke behaviour consistent shift after shift.
Size and port step up with required flow: 200, 300, 400 and 600, with ports from 1/8 in to 1 in; this unit is 300 size with NPT3/8. Drain type: differential-pressure is the default (this unit), automatic (A) suits unattended draining, manual (M) drains on demand. Filter grade is 40 um standard; choose 5 um (code W) where finer filtration is needed. Gauge: the embedded square gauge is standard (this unit, MPa scale); an external round gauge is optional, with MPa, psi or bar scales. Thread is PT as standard; G (BSPP) and NPT are order options - this unit is NPT. Bracket optional (this unit has none). This is the low-pressure regulator type; its exact adjustment range is not published in our sheet, so confirm it with us. Flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
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 family as performance curves, not as a single rated figure, so we do not quote a number. Tell us your application and we will confirm the flow and full datasheet figures for the GFR300-10LJF1T on request before you order.
Differential-pressure drain is the default option on the GFR family and is what this model carries. Automatic (code A) and manual (code M) drains are catalogue choices on the same series. If you prefer a different drain arrangement, ask us about the equivalent GFR300 variant with that code.
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.