The AirTAC GFR30010LJF1TK AirTAC Low-Pressure 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 AirTAC GFR300 series combines filtration and pressure regulation in a single body: compressed air is cleaned of water and particulate, then held at your set working pressure downstream. This unit is the 300 size with 3/8 in NPT ports, built as the low-pressure type for circuits that run below standard regulator settings. It carries the standard 40 um filter element, a differential-pressure drain that bleeds collected condensate as flow passes through, a polycarbonate bowl, and an embedded square pressure gauge scaled in MPa. A reverse (check) valve is fitted, so downstream pressure is retained if the upstream supply is lost, and no mounting bracket is included with this configuration.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, optional 5 um filtration (code W), automatic or manual drains, square or external round gauges with MPa, psi or bar scales, and G (BSPP) or NPT threads as order options. Rated flow is published as curves rather than a single figure, so ask us to confirm sizing and full datasheet figures against your application.
| Model | GFR30010LJF1TK AirTAC Low-Pressure 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 | Fitted (reverse flow permitted) |
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. |
| K | Reverse-flow (reflux) valve fitted. |
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) |
Fixture clamps and swing cylinders that must close gently and hold at a reduced working pressure get filtered air plus a stable low setpoint from one body, with the check valve holding the clamp position if the shop supply dips.
Dispensing valves and bead guns on packaging or woodworking lines need clean, dry air regulated to a low, steady setting so bead width stays consistent; the 40 um element protects the metering valve from particulate.
Short-stroke cylinders that divert, guide or reject product run continuously on 3/8 in drops; this unit conditions their supply and keeps the low operating pressure they were sized for, with the gauge giving a visible setpoint check.
Start with the port step: the 300 size takes 3/8 in ports, and moving up or down a size changes both the connection and the flow capacity, so match it to your line's air demand. This configuration is the low-pressure type - choose it when your circuit holds a working pressure below what a standard regulator is set for, and confirm the exact adjustment range with us before ordering. The fitted reverse valve holds downstream pressure through supply interruptions; delete it (no K) if you do not want that behaviour. The 40 um element is the standard grade; specify W for 5 um where finer particulate removal matters. The differential-pressure drain is automatic in operation; automatic (A) and manual (M) drains are alternatives. The embedded square gauge reads in MPa; external round gauges and psi or bar scales are options. Thread here is NPT - PT is the standard and G (BSPP) is orderable. No bracket is fitted; one can be specified. Because flow is published as curves rather than a single rating, 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR300 series as curves rather than a single rated figure, so we do not quote a number here. Tell us your line's air demand and working pressure and we will confirm the correct size and the datasheet flow figures for this exact configuration on request.
The L in this code marks the low-pressure regulator type, intended for circuits held below standard regulator settings; its exact adjustment range is not published in our sheet, so confirm it with us before ordering. K means a reverse (check) valve is fitted to retain downstream pressure on supply loss, and F1 means the embedded square gauge is included, scaled in MPa.
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.