The AirTAC GFR30015LJC3T AirTAC 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 GFR30015LJC3T is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 300 unit has a 1/2 in NPT port, the low-pressure regulator type, a 40 um standard filter element, and a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element rises. The polycarbonate bowl lets you see the condensate level at a glance, and a round gauge with a bar scale is fitted so the set pressure is readable without extra hardware.
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 including a 5 um element (code W), automatic or manual drains, alternative gauge scales, and G or NPT threads in place of the PT standard. We confirm flow and datasheet figures for your exact configuration on request.
| Model | GFR30015LJC3T AirTAC 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 | Fitted — round, bar 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. |
| 3 | Gauge scale: bar. 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. |
| (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) |
Feeds filtered, regulated air to the tool-change and clamping circuits of a machining centre, with the bar gauge giving the setter a direct reading of the clamp pressure at the machine.
Conditions the air feeding pneumatic cylinders on a carton-forming and sealing conveyor, where the low-pressure regulator holds a gentle set pressure for delicate product handling.
Installed at the drop point of a factory air main to serve an assembly cell, removing pipe-scale and condensate downstream of the compressor room before air reaches the cell's valves and cylinders.
Size 300 with a 1/2 in NPT port suits lines where moderate-to-high air delivery is needed; step up to size 400 or 600 for larger ports and higher flow, or down to size 200 where space is tight. The low-pressure regulator type in this code is intended for circuits that hold a reduced set pressure - ask us to confirm the exact adjustment range for this configuration, as it is not published in the standard table. The 40 um element is the standard grade; specify the W suffix if your application needs 5 um filtration. Drain is differential-pressure as coded; automatic (A) or manual (M) drains can be ordered instead. The fitted round gauge reads in bar; MPa or psi scales and the embedded square gauge are alternatives. PT is the standard thread and G or NPT are order options - this unit is built with NPT. No bracket is included with the J code, so plan your mounting accordingly. Flow is published as curves rather than a single rating, so 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 the GFR series as curves rather than a single rated figure, so we do not quote a number here. Tell us your line pressure, set pressure and expected air demand, and we will confirm the flow and sizing for this exact unit from the datasheet on request.
The blank drain position in the code means the differential-pressure drain: condensate in the bowl is discharged automatically when the pressure drop across the 40 um element rises, with no operator attention needed. If you prefer a fully automatic float drain or a manual drain valve, those are available as the A or M suffix on this family - just ask when ordering.
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.