The AirTAC GFR30015LF3TK 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 GFR30015LF3TK is an AirTAC GFR300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 300-size unit is ordered with a 1/2 in NPT thread, the low-pressure regulator type, a differential-pressure drain on the bowl, the standard 40 um filter element, an embedded square gauge scaled in bar, a reverse (check) valve fitted, and the mounting bracket included. The bowl on this size is polycarbonate (PC).
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600, with port options from 1/8 in to 1 in, G (BSPP) or NPT threads as order options, automatic, manual or differential-pressure drains, a 5 um element (code W) in place of the 40 um standard, and gauge scale choices. Flow is published as curves rather than a single rating, so we confirm the datasheet and sizing figures on request.
| Model | GFR30015LF3TK 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 — square, 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. |
| (blank) | Mounting bracket included. |
| (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. |
| 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Mounted ahead of a carton-sealing or wrapping machine's air line, this unit filters water and debris from the shop supply and holds a steady low-pressure setting for the machine's pneumatic cylinders and valves.
Feeding bench-top lab equipment that needs clean, low-pressure air, the 40 um element strips water and particulate while the bar-scaled gauge lets technicians set and verify the supply pressure.
Installed at the drop to a conveyor's pneumatic pushers and stops, the filter-regulator protects downstream components and the check valve holds the set pressure if the upstream supply dips.
Size and port set the flow path: the 300 size with a 1/2 in NPT port suits lines where a 1/2 in connection is specified, while smaller or larger duties step down or up through the 200/400/600 sizes. Because the regulator here is the low-pressure (L) type, confirm your working band suits a low-pressure unit before ordering. The differential-pressure drain bleeds the bowl automatically as flow passes; choose the automatic-drain or manual-drain variant if your installation needs a different approach. The 40 um element is the standard grade; order the W suffix for 5 um finer filtration. The fitted square gauge reads in bar, and MPa or psi scales are available as options; an external round gauge is also optional. Thread is NPT here, with PT (standard) and G (BSPP) as order options, and the bracket is included.
Flow is published as curves, not a single rating, so 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. The reflux valve permits reverse flow 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 figure, so there is no one number we can quote. Send us your line pressure, downstream demand and duty, and we will confirm the flow curve and correct sizing from the datasheet before you order.
The L in the code marks the low-pressure regulator type, intended for applications working below the standard regulator's band; the exact adjustment range for this type is not published, so we confirm it on request. The K marks a fitted reverse (check) valve, which holds the downstream setting if upstream supply is interrupted. The F3 indicates the embedded square gauge scaled in bar.
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.