The AirTAC GFR300-15LJC2 AirTAC Filter Regulator PT1/2 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 GFR300-15LJC2 is a 300-size filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is the low-pressure type, fitted with a 40 um standard filter element and a differential-pressure drain that bleeds collected condensate automatically as flow passes through. It carries a 1/2 in PT thread, a maximum inlet pressure of 1.0 MPa (145 psi), and an operating temperature of -5 to 70 C (non-freezing). The bowl on the 300 size is polycarbonate (PC), and this unit is ordered without a mounting bracket, without a reverse/check valve, and with an external round pressure gauge on the psi scale.
This is a genuine AirTAC part. The GFR filter-regulator family spans sizes 200, 300, 400 and 600, with port options from 1/8 in to 1 in, PT, G or NPT threads, manual, automatic or differential-pressure drains, a 5 um (code W) filter element option, embedded square or external round gauges on MPa, psi or bar scales, and optional brackets. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application on request.
| Model | GFR300-15LJC2 AirTAC Filter Regulator PT1/2 Low Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (PT 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 | 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. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
On a fixture-clamping or pneumatic-press line, this filter regulator cleans the supply of water and swarf and holds a low regulated setpoint to the clamping cylinders, with the round psi gauge giving operators a direct local pressure readout.
At the drop point feeding a cartoning or wrapping machine's valve manifold, the 40 um element and differential-pressure drain keep condensate and particulate out of the directional valves while the low-pressure type regulator supplies the machine's low-pressure circuit.
Mounted at the take-off feeding conveyor diverters, stoppers and gate actuators, this 1/2 in unit filters the plant air and regulates it to the pressure the actuators were sized for, draining accumulated condensate automatically as air flows through.
Start with the port step: the 300 size here gives a 1/2 in PT connection, so step up to the 400 or 600 series if your line runs larger ports and higher air demand, or down to the 200 series for compact circuits. This is the low-pressure (L) type, intended for circuits regulated to low setpoints; the exact regulation range for the low-pressure type is not published, so confirm it with us against your setpoint before ordering. The differential-pressure drain (the default) suits steady-flow installations; choose code A for automatic draining at low flow or code M for manual draining in intermittently used circuits. The 40 um element is the standard grade; specify W for the 5 um element where finer filtration is needed. The external round gauge in this code reads in psi; square embedded gauges and MPa or bar scales are also available. Thread is PT as standard, with G (BSPP) and NPT available as order options, and brackets are optional (this unit is ordered without one).
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. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as curves rather than a single rated figure, so we do not quote a rated flow number, Cv or SCFM. Tell us your application and we will confirm the relevant flow-curve and datasheet figures on request before you order.
The L in GFR300-15LJC2 marks the low-pressure regulator type, intended for circuits regulated to low setpoints; the exact range for this type is not published, so confirm your setpoint with us. This unit also carries the default differential-pressure drain, which discharges collected condensate automatically as air flows through - no manual draining needed on steady-flow lines.
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.