The AirTAC GFR30010LJC1WTK AirTAC Filter Regulator NPT3/8 5 um is a genuine G-series filter regulator: water separation, 5 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 GFR30010LJC1WTK is a GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in a single 300-size body with NPT3/8 ports. This configuration carries the W-code 5 um filter element for finer air cleaning than the standard 40 um grade, a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element rises, and the L-code low-pressure regulator type for circuits that run below standard line pressure. It is fitted with an external round pressure gauge on the MPa scale and a K-code reverse (check) valve, and it comes without a mounting bracket. The polycarbonate bowl is transparent so fluid level and drainage are easy to inspect.
This is a genuine AirTAC part from the GFR range, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch and options including manual or automatic drains, 40 um or 5 um elements, square or round gauges on MPa, psi or bar scales, and G, NPT or PT threads. Rated flow for this series is published as curves rather than a single figure, so ask us and we will confirm the datasheet numbers for your application before you order.
| Model | GFR30010LJC1WTK AirTAC Filter Regulator NPT3/8 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 5 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 — round, 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). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
On a carton-sealing line, the sealing bars and hold-down cylinders often run below standard header pressure. This low-pressure-type filter regulator feeds that branch from the main 3/8 in drop, the 5 um element keeps fine contamination out of the seal actuator valves, and the check valve holds the set pressure if the upstream supply dips.
Bench-top analysers and sample-handling pneumatics in a laboratory need clean, steadily regulated air at modest pressure. This unit filters the house supply down to 5 um, regulates it in the low-pressure band, and its transparent polycarbonate bowl lets staff see condensate build-up at a glance during routine checks.
Sorting and divertor cylinders along a conveyor line need clean air and a stable, moderate set pressure to cycle without hammering. Fed from a 3/8 in branch, this filter regulator conditions the station supply, the MPa gauge lets technicians verify the setting during changeover, and the check valve prevents back-feed between station zones.
Start with the port step: this unit is a 300-size body on NPT3/8, so check that your line size and expected air demand sit comfortably in the 300 class before stepping up to 400 or down to 200. The 5 um W-grade element here suits points of use that see finer contamination than the standard 40 um grade handles; if your circuit only needs bulk water and chip removal, the standard grade is the economical choice. Drain type is a real decision: differential-pressure (as fitted here) needs no operator attention, automatic drains suit unattended duty, and manual drains give positive control at intermittently run stations. Because this is the L-code low-pressure regulator type, confirm its setting range against your circuit before ordering - the exact range for this variant is not published in our sheet and we will confirm it on request. Gauge scale (MPa here, with psi or bar available) and thread family (NPT here; PT is the standard catalogue thread, G is also offered) should match the rest of your panel, and the J-code means you should plan your own mounting if the unit cannot hang on the piping. Flow for this series is published as curves, not a single rating, so send us your application details and we will confirm sizing against the datasheet before you order.
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 GFR series as characteristic curves rather than a single rated figure, so we do not quote a l/min or SCFM number. Send us your line pressure, set pressure and expected air demand, and we will confirm the datasheet curve for this 300-size, NPT3/8 unit and check it against your application before you order.
The L marks the low-pressure regulator type, intended for circuits that run below standard line pressure; the exact setting range for this variant is not published in our sheet, so confirm it with us before ordering. The drain is the differential-pressure type: it releases accumulated condensate automatically whenever the pressure drop across the 5 um element rises, so no manual draining is needed under normal duty.
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.