The AirTAC GFR40015LC3TK 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 AirTAC GFR40015LC3TK is a size 400 filter regulator that combines two jobs in one body: it removes water and particulate from compressed air through a 40 um element, and it regulates downstream pressure. This unit is the low-pressure type, so it is set up for circuits that hold a lower working pressure than a standard regulator is aimed at. It carries a differential-pressure drain, which bleeds accumulated condensate automatically whenever the pressure differential across the unit is high enough, so there is no manual draining routine to remember. A round external gauge scaled in bar is fitted for direct reading of the set pressure, and a reverse (check) valve is built in so that downstream pressure is held if the upstream supply drops. The port is 1/2 inch NPT thread, and a mounting bracket is included.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600, with port options from 1/8 inch to 1 inch, G (BSPP) and NPT thread variants alongside the PT standard, manual and automatic drain choices, a 5 um filter element option, and gauge or no-gauge configurations. We confirm flow and other datasheet figures on request, because flow for this family is published as curves rather than a single rated number.
| Model | GFR40015LC3TK AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR400 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 | 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.
| GFR400 | G-series filter regulator, 400 body — sets the port range. |
|---|---|
| 15 | Port size PT1/2". This body offers 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). |
| 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. |
| 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 | GFR400 · PT1/2" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Feeding filtered, regulated air to the cylinders and actuators on a packaging line, where the low-pressure setting keeps sealing and clamping stations from over-pressurising and the check valve holds the circuit if the supply dips.
Supplying a workholding clamping circuit on a CNC fixture, where clean air protects the clamp cylinders and the regulated low pressure gives repeatable clamping force without a separate filter and regulator in the line.
Preparing air for the diverters, gates and stoppers along a conveyor system, with the 40 um element keeping debris out of the valves and the bar-scaled gauge letting maintenance verify the set point at a glance.
Start with the port step: this unit is 1/2 inch NPT, and the size 400 body is the larger frame in the GFR range, so size up or down against the pipe and the air demand of the circuit. The 40 um element is the standard grade; if the application needs finer filtration, the 5 um element is available as the W option. Drain choice matters in practice: differential-pressure drain (fitted here) suits lines that run steadily, while the automatic drain option suits intermittent duty and the manual drain suits supervised installations. The round gauge fitted here reads in bar; square embedded gauges and MPa or psi scales are the other published options. Thread is NPT on this unit, with G (BSPP) and PT available to order, and a mounting bracket is included. Flow for this family 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 GFR family as curves rather than a single rated figure, so we do not quote a l/min or SCFM number for this unit. Send us your application details and we will confirm the flow and sizing from the datasheet on request.
The L in the code marks this as the low-pressure regulator type, intended for circuits that operate at lower working pressures than the standard version; the exact adjustment range for the low-pressure type is not published in the data we hold, so confirm it with us on request. The K in the code means a reverse (check) valve is fitted, so downstream pressure is held if the upstream supply is lost.
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.