The AirTAC GFR30015LJC3WTK AirTAC Filter Regulator NPT1/2 Low-Pressure 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 GFR30015LJC3WTK is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in a single body. It removes water and particulate from compressed air down to 5 um (the fine W grade, versus the 40 um standard element) and regulates downstream pressure as a low-pressure type. This 300-size unit is fitted with 1/2 in NPT ports, a differential-pressure drain that bleeds collected condensate automatically as flow passes through, a round external gauge reading in bar, and a reverse/check valve that holds downstream pressure if the supply is interrupted. No mounting bracket is included with this configuration. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part. The GFR filter-regulator family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of PT, G (BSPP) or NPT threads, manual, automatic or differential-pressure drains, 40 um or 5 um filtration, standard or low-pressure regulation, gauge or no-gauge versions, and optional brackets. Because flow is published as curves rather than a single rated figure, ask us to confirm the flow and datasheet figures for this exact model against your application before ordering.
| Model | GFR30015LJC3WTK AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| 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, bar scale |
| 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. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 3 | Gauge scale: bar. 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. |
| 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Point-of-use conditioning for the air feeding a machining centre's tool-changer and clamping circuits: the 5 um element protects fine pilot valves from particles and water, the low-pressure regulator holds a reduced working pressure for sensitive actuators, and the check valve keeps the circuit pressurised if shop air drops.
Conditioning the air supply to a packaging conveyor's diverter gates and bag-seal cylinders, where the fine 5 um grade keeps moisture and debris out of the sealing station's valves and the low-pressure regulation suits low-force actuation.
Supplying filtered, regulated air to a lab analyser or instrument cabinet purge: the 5 um filtration guards the instrument's internal pneumatics, the low-pressure regulator holds a gentle supply pressure, and the bar gauge gives the technician a visible setpoint reference.
Start with size and port: the 300 series with 1/2 in NPT ports suits lines where half-inch pipework is already in place, but the right size step depends on the flow your circuit actually needs, so have us check the published flow curve against your demand. This unit carries the fine 5 um element (code W); choose it where downstream valves, cylinders or instruments are sensitive to finer particles, or specify the 40 um standard grade for general protection. The low-pressure regulator is intended for circuits that run at reduced working pressures - the exact adjustment range for the low-pressure type is not published, so confirm it with us before ordering. The differential-pressure drain discharges condensate automatically with air flow, with no manual draining routine; automatic or manual drains are available as alternatives in the family. The round external gauge reads in bar (MPa and psi scales are also offered), the fitted reverse/check valve holds downstream pressure on supply loss, and PT or G threads can be ordered instead of NPT. If you need a mounting bracket, that is an option on this family - this particular code ships without one.
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 rather than a single rated figure, so we do not quote one number. Tell us your operating pressure and the flow your circuit needs and we will confirm from the datasheet curve whether this 300-size, 1/2 in NPT unit is correctly sized before you order.
The L code marks this as the low-pressure regulator variant, intended for circuits that run at reduced working pressures below the standard type's range. The exact adjustment range for the low-pressure type is not published in the material we work from, so please confirm the range with us against your setpoint before ordering. The unit is otherwise a standard GFR300: 5 um filtration, differential-pressure drain, round bar gauge, reverse/check valve fitted, 1.0 MPa (145 psi) maximum inlet, and -5 to 70 C operation.
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.