The AirTAC AirTAC GFR30015LJNTK Filter Regulator NPT1/2 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 PT1/2" 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 GFR30015LJNTK is a size-300 filter regulator: water and particulate filtration plus pressure regulation combined in one body, with a 1/2 in NPT port. This configuration is the low-pressure type (code L) for circuits set below standard regulator ranges, carries the standard 40 um filter element, and uses the differential-pressure drain, which discharges collected condensate automatically as flow conditions change. No gauge is fitted (code N), a reverse/check valve is included (code K), and no mounting bracket is supplied (code J). The polycarbonate bowl is rated with the unit for a maximum inlet pressure of 1.0 MPa (145 psi) and a medium temperature of -5 to 70 C, non-freezing, with compressed air as the only medium.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and is orderable in PT, G (BSPP) or NPT thread, with manual or automatic drain, a 5 um (W) filter element, gauge options and bracket choices. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | AirTAC GFR30015LJNTK Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (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 | 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. |
|---|---|
| 15 | Port size PT1/2". 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. |
| 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 · PT1/2" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Conditioning the air feed to clamp, push and grip actuators on a cartoning or case-packing conveyor, where the low-pressure regulator holds a reduced working pressure for gentle product handling and the 40 um element keeps debris out of the cylinders.
Supplying filtered, regulated air to pneumatic clamps and swing cylinders on a machining or assembly fixture, with the check valve helping hold the set downstream pressure if the upstream supply dips mid-cycle.
Feeding spray guns, air-assisted coating heads and atomising lines that run at reduced pressures, where the combined filter-regulator keeps water and particulates out of the finish and the automatic drain handles condensate without daily attention.
Start with the port and size: this unit is size 300 with a 1/2 in NPT port; if your line needs more or less flow capacity, the GFR family steps through sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in. Choose the drain to match maintenance access: the differential-pressure drain fitted here discharges condensate automatically, while manual (M) and automatic (A) versions are orderable. The standard 40 um element suits general plant air; specify the 5 um (W) grade where downstream equipment needs finer filtration. This is the low-pressure type (L), intended for lower set pressures than the standard regulator - confirm the exact range with us before ordering. Gauge options (round or square, MPa/psi/bar scales), bracket inclusion and PT/G/NPT threads are all decodable choices on the order code.
Because published flow data is in curve form rather than a single rating, send us your application details and we will confirm sizing against the datasheet before you commit to a model.
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 performance curves rather than a single rated figure, so we do not quote one number. Tell us your line pressure, set pressure and the flow your actuators need, and we will confirm the correct size against the datasheet on request before you order.
The differential-pressure drain is the default drain on this configuration: it uses the pressure difference across the filter element to discharge collected condensate automatically during operation, so there is no draincock to open by hand. If your duty cycle suits a different arrangement, manual-drain (M) and automatic-drain (A) versions are orderable as separate codes in the same GFR300 series.
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.