The AirTAC GFR400-15 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 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 GFR400-15 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 400-size unit is fitted with a 1/2 in PT port, an automatic drain that expels collected condensate without manual attention, a 40 um standard filter element, and a round pressure gauge reading in psi. It is a low-pressure type regulator, intended for circuits that run below the standard regulator range; the exact adjustment range for this variant is confirmed on request. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl lets you see the condensate level at a glance, and a mounting bracket is included.
This is a genuine AirTAC part. The GFR filter-regulator family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and can be ordered with manual or differential-pressure drains, a 5 um element (code W), embedded square or external round gauges in MPa, psi or bar scales, a reverse/check valve, and PT, G (BSPP) or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR400-15 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, psi 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.
| 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". |
| 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. |
| (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. |
| (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 | GFR400 · PT1/2" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Feeding regulated, water- and particle-filtered air to spray booths and coating guns on a finishing line, where the automatic drain keeps condensate off the work between shifts.
Conditioning the air feeding carton sealers, case packers and wrapping machines, holding a steady low working pressure to the cylinders while the 40 um element stops scale reaching the valves.
Serving as the single filter-regulator point at the entrance to a machine's pneumatic manifold, with the psi gauge giving operators a visible setpoint and the bracket securing the unit in the panel.
Choose the size and port step against the air consumption of the circuit: the GFR400 with its 1/2 in PT port sits in the upper mid-range of the family, one step above the 300 size. For the drain, automatic (this unit) suits points where nobody visits the machine regularly; manual drain suits attended stations; differential-pressure drain is the catalogue default. The 40 um element is the standard grade for general plant air - step down to the 5 um W option only where downstream equipment needs finer filtration, ideally with a dedicated fine filter after it. This unit carries a round gauge on a psi scale; embedded square gauges and MPa or bar scales are the alternatives. PT is the standard thread, with G (BSPP) and NPT available as order options, and the mounting bracket is included. Because flow is published as curves rather than a single rating, send us your application details and we will confirm sizing from 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, not as a single rated number, so we do not quote a figure here. Tell us your working pressure and air consumption and we will confirm the sizing from the datasheet on request before you order.
The A in the code fits an automatic drain, which discharges collected condensate by itself - the right choice for machines that run unattended; manual and differential-pressure drains are the other catalogue options. The L code marks the low-pressure regulator type, intended for circuits running below the standard adjustment range; the exact range for this variant is not published in our sheet, so we confirm it on request.
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.