The AirTAC GFR300-15LJC2WT AirTAC Filter Regulator NPT1/2 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 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 GFR300-15LJC2WT is a filter regulator: water and particulate removal plus pressure regulation combined in one body. This 300-size unit is threaded NPT1/2 (1/2 in), built as the low-pressure type for circuits that need lower set pressures, and fitted with a 5 um filter element (code W) for finer filtration than the standard 40 um grade. Condensate is removed by the differential-pressure drain, and an external round gauge on a psi scale shows the regulated downstream pressure. No mounting bracket is included and no reverse/check valve is fitted.
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, and options for drain type, filter grade, gauge style and scale, thread form and bracket. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing or any datasheet figure for your application before ordering.
| Model | GFR300-15LJC2WT AirTAC Filter Regulator NPT1/2 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (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, psi 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. |
|---|---|
| 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. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 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. |
| (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 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
A low-pressure filter regulator feeding clamping cylinders on a CNC fixture line: the 5 um element keeps swarf-contaminated shop air out of the clamp valves while the regulator holds the lower holding pressure the low-pressure type is built for.
Feeding spray guns on a coating line, where the 5 um grade removes fine particles and water carryover that would spoil finish quality, and the low-pressure regulator sets the gentler atomising pressure the guns require.
Conditioning air to a robotic gripper manifold: clean, dry, regulated supply at reduced pressure protects the small gripper valves, and the round psi gauge lets a technician read the set point directly at the cell.
Start with the port step: this unit is 300 size at NPT1/2, one of the four GFR sizes (200/300/400/600) that step up in port and flow capacity - pick the size whose flow curve covers your demand. You have chosen the 5 um element (W) over the 40 um standard, which suits finer-particle-sensitive downstream equipment; the trade-off is more frequent element attention. Drain is differential-pressure here; automatic (A) or manual (M) drains are available if your duty needs them. The gauge on this code is the external round type on a psi scale; embedded square gauges and MPa or bar scales are the other options. Thread is NPT on this code, with PT (standard) and G also orderable, and brackets can be added if you did not take the J (no bracket) option. Because flow is published as curves rather than a single rating, 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. 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 curves, not as a single rated figure, so we do not quote a number. Tell us your application - working pressure, expected consumption and duty cycle - and we will confirm the sizing against the datasheet on request before you order.
The L in the code marks the low-pressure regulator variant, intended for circuits that operate at lower set pressures than the standard type. The exact adjustment range for the low-pressure type is not published in the sheet we work from, so we will confirm it on request; the standard-type range is not the right figure to assume here.
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.