The AirTAC GFR300-15LJF2W AirTAC Filter Regulator 1/2 in PT, 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 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 GFR300-15LJF2W is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration carries the fine 5 um element (code W, against the 40 um standard), drains condensate automatically by differential pressure, and is threaded PT1/2 (1/2 in, PT as the standard; G and NPT are order options). The embedded square gauge is fitted and scaled in psi, the regulator is the low-pressure type, no reverse/check valve is fitted, and no mounting bracket is included.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, plus drain, filter-grade, gauge-scale, thread and bracket options. Maximum inlet pressure is 1.0 MPa (145 psi), the working temperature range is -5 to 70 C (non-freezing), and the bowl on this size is polycarbonate (PC). Flow is published as curves rather than a single rating, and the low-pressure regulation range is not stated in the catalogue, so ask us to confirm figures against your application before ordering.
| Model | GFR300-15LJF2W AirTAC Filter Regulator 1/2 in PT, 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (PT 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 — square, 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). |
| F | Gauge shape: Square. 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. |
| (blank) | PT 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) |
Feeds filtered, reduced-pressure air to the jet and clamping circuits of a weaving line, where a fine 5 um element keeps mist and particle carry-over out of sensitive nozzles running well below standard shop pressure.
Sits at the inlet of a laboratory or pilot rig that needs clean air held at a low, stable setting, with the psi-scaled square gauge giving the operator a direct local read of the regulated line.
Conditions the air feeding low-pressure actuator and hold-down circuits on a cartoning or wrapping conveyor, combining water and particle removal with regulation in one body to save panel space.
Size 300 with a PT1/2 port sits mid-range in the GFR line; step between sizes 200, 300, 400 and 600 (ports 1/8 in to 1 in) to match your line size and demand. The real, decodable choices on this family are: drain type (differential-pressure as here, automatic, or manual), filter grade (40 um standard or the 5 um W element fitted here), gauge (embedded square as standard, external round optional, scales MPa, psi or bar - this unit is square, psi), thread (PT standard, G or NPT to order), and bracket (not included on this J-coded unit). Because flow is published as curves rather than a single rating, and the low-pressure regulation range is not stated in the catalogue, 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. 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 series as curves rather than a single rated figure, so we do not quote a number on the page. Tell us your line pressure and demand and we will confirm the sizing from the datasheet on request before you order.
The L code marks the low-pressure type regulator, intended for circuits that run well below standard line pressure. The exact regulation range for the low-pressure type is not published in the catalogue, so confirm your working pressure with us and we will verify suitability from the datasheet.
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.