The AirTAC GFR30015ALJF3T AirTAC Filter Regulator NPT 1/2 in 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 automatic 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 GFR30015ALJF3T is a GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body, so one 1/2 in NPT unit does both jobs in the air-preparation position. This configuration is the size-300 frame with an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, the low-pressure regulator type for circuits that run below standard regulated pressures, an embedded square gauge scaled in bar, and no mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing); the polycarbonate bowl is standard at this size.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options include manual or differential-pressure drains, a 5 um element (code W), alternative gauge scales in MPa or psi, G (BSPP) or NPT threads in place of the PT standard, and a mounting bracket. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application.
| Model | GFR30015ALJF3T AirTAC Filter Regulator NPT 1/2 in |
|---|---|
| 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, 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". |
| A | Drain: Automatic 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. |
| 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) |
Feeding clean, regulated air to the tool-clamp and pallet-change circuits of a CNC machining center, where the automatic drain keeps condensate out of the valves during unattended shifts and the 40 um element protects the clamping spools.
Conditioning the air feeding cylinder-driven case-erectors and sealing heads on a packaging line, with the regulator holding a steady low-pressure setting so carton clamps and pushers cycle consistently through a half-inch drop from the main.
Serving a bank of pneumatic looms or spinning frames from a half-inch service drop, where the automatic drain copes with moisture carryover in a humid mill environment and the bar-scaled square gauge gives operators a readable setpoint.
Size and port are the first choice: the 300 frame with a 1/2 in NPT port suits lines where moderate-to-high air demand is served from a half-inch main, and stepping up to size 400 or 600 buys more flow capacity at the cost of footprint. Because flow is published as curves rather than a single rating, send us your demand figures and we will confirm the right size against the datasheet before you order. The other decodable choices are the drain (this unit is automatic; manual and differential-pressure versions exist), the filter grade (40 um standard here, 5 um with code W for finer protection), the gauge (embedded square, bar scale on this unit; MPa or psi scales and an external round gauge are options), the thread (PT is the AirTAC standard; G and NPT are order options, and this unit is NPT), and the bracket (not fitted here; add it if the unit will be wall- or panel-mounted rather than screwed into the line). The low-pressure regulator type is the correct pick when the controlled pressure sits below the standard type's range; we will confirm the exact adjustment span for this variant on request.
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 GFR300 series as curves, not as a single rated number, so we do not quote a figure that could mislead your sizing. Send us your line pressure and air demand and we will confirm the flow curve and correct size from the datasheet on request.
The A in the code GFR30015ALJF3T means the bowl drains itself: collected condensate is ejected automatically, which suits unattended or hard-to-reach installations. Manual-drain and differential-pressure-drain versions of the same GFR300 filter regulator exist if you prefer to control drainage yourself - ask us for the alternative model code.
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.