The AirTAC GFR30010MLJNTK AirTAC Filter Regulator NPT3/8 Low-Pressure 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR30010MLJNTK is a size 300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has a 3/8 in NPT port, a 40 um standard filter element, a manual drain on the PC (polycarbonate) bowl, and the low-pressure regulator type. A reverse (check) valve is fitted, and the unit is supplied without a gauge and without a mounting bracket.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in up to 1 in, and options including automatic or manual drains, a 5 um (W) element, gauge choices, G or NPT threads and bracket variants. Flow is published as curves rather than a single rating, so we confirm the datasheet and sizing figures on request.
| Model | GFR30010MLJNTK AirTAC Filter Regulator NPT3/8 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Not fitted |
| 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| N | No pressure gauge (N). |
| (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. |
| 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) |
On a CNC fixture line that clamps workpieces at reduced air pressure, this unit filters incoming water and swarf-laden air to 40 um and holds the low downstream setting the clamping cylinders were designed for, with the check valve holding the clamp if supply pressure dips.
On a carton-sealing conveyor, the 3/8 in port feeds the pusher and flap-fold cylinders; the manual drain lets the maintenance round empty accumulated condensate at shift start, keeping moisture out of the cylinder seals.
At a paint spray booth where atomising air is run at reduced pressure, this unit strips water and particulate from the shop air line and regulates it down to the setting the spray gun requires, protecting finish quality from moisture carryover.
Size 300 with a 3/8 in port sits in the middle of the GFR range; step up to size 400/600 or down to size 200 depending on the flow your line needs. The manual drain means an operator opens the drain valve periodically to expel collected water - choose the automatic or differential-pressure drain variant if you cannot schedule that. The 40 um element is the standard grade; specify the W code for 5 um where finer filtration matters. This unit is the low-pressure regulator type, and the exact adjustment range for that variant is not published in our sheet, so ask us to confirm it before ordering. No gauge is fitted (code N); gauge options with MPa, psi or bar scales exist in the series. The NPT thread is an ordered option - PT is the catalogue standard, and G (BSPP) is also available. A bracket can be added if this J-coded, bracket-less unit needs panel fixing. 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 GFR series as curves, not as a single rated figure, so we do not quote a number here. Tell us your line pressure and the flow your application needs, and we will confirm the sizing against the datasheet on request before you order.
The M in the code means the PC bowl drains via a manual valve: an operator opens it periodically to expel collected water and contaminant, rather than the bowl draining itself as with the automatic or differential-pressure variants. The N means no gauge is fitted; gauge options with MPa, psi or bar scales exist in the GFR series if you want a visual pressure indication.
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.