The AirTAC GFR400-15LC2K AirTAC Filter Regulator PT1/2 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 GFR400-15LC2K is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 400-size unit is ported PT1/2 (1/2 in, PT thread standard; G and NPT are order options), carries the standard 40 um filter element, and drains condensate by differential pressure, so the bowl empties automatically as flow passes through. It is the low-pressure (L) type, is fitted with a reverse/check valve (K), and includes a round external gauge scaled in psi. The polycarbonate bowl suits the non-freezing -5 to 70 C operating range, and the maximum inlet pressure is 1.0 MPa (145 psi).
This is a genuine AirTAC part. The GFR family is published in 200, 300, 400 and 600 sizes with ports from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drains, a 5 um element option (code W), gauge scales in MPa, psi or bar, and bracket options. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and the low-pressure regulation range against your application before ordering.
| Model | GFR400-15LC2K AirTAC Filter Regulator PT1/2 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (PT 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, psi 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. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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) |
Feeds spray guns on a finishing line, where the low-pressure regulator type holds a gentle, steady supply pressure while the 40 um element keeps water and dirt out of the paint-air path.
Sits ahead of carton-sealing and case-forming cylinders on a packaging line, cleaning the air and letting operators set a stable low working pressure for consistent box clamping.
Supplies workholding clamps on a CNC fixture line, where the check valve helps hold the set circuit pressure and the differential-pressure drain keeps condensate out of the clamp cylinders.
Size and port are the first choice: this unit is 400 size with a PT1/2 (1/2 in) port, and the GFR range steps through 200/300/400/600 with ports from 1/8 in to 1 in, so pick the size whose flow curve covers your demand. Drain type is decodable: this one uses the differential-pressure drain (blank code); automatic (A) and manual (M) are alternatives. Filter grade is 40 um standard here, with 5 um available as code W where finer filtration is needed. This is the low-pressure (L) type, so confirm its regulation range with us if your set pressure is not clearly low. The round gauge on this unit is scaled in psi; square embedded gauges and MPa or bar scales are the other options. Thread is PT as standard, with G (BSPP) and NPT orderable, and a bracket is included.
Because flow is published as curves and not a single rating, 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 series as curves, not as a single rated number, so we do not quote a l/min or SCFM figure. Send us your application details and we will confirm the flow-curve data and sizing for the 400 size, PT1/2 unit before you order.
L marks the low-pressure regulator type, suited to lower set pressures; the exact regulation range for this variant is not published, so confirm it with us. The drain is differential-pressure (blank code), meaning condensate is discharged automatically as air flows through, with no manual draining needed.
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.