The AirTAC GFR400-15 AirTAC Filter Regulator PT1/2 Auto Drain 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 holds downstream pressure steady, in a single body. This configuration is the size 400 unit with a PT1/2 (1/2 in) port, automatic drain, standard 40 um filter element, a round gauge on a psi scale, and a reverse/check valve fitted. The polycarbonate bowl lets you see the condensate level at a glance, and a mounting bracket is included.
This is a genuine AirTAC part from the GFR range, which spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in and PT, G (BSPP) or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulation range is 0.15-0.9 MPa (20-130 psi), and the working temperature range is -5 to 70 C (non-freezing). Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR400-15 AirTAC Filter Regulator PT1/2 Auto Drain |
|---|---|
| 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 | Standard 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 | 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. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). 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)). |
| (blank) | Standard 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) |
Clean, pressure-stable air to spray guns and atomising heads. The 40 um element strips water and particulate before the gun, the regulator holds the set point the operator chooses, and the automatic drain clears condensate from the bowl without a manual walk-round.
Feeding cylinders, grippers and sealing heads on packaging lines. One GFR400-15 at the machine inlet filters the shop air and holds downstream pressure steady through the shift, while the check valve keeps the circuit supplied if the main line pressure dips.
Point-of-use treatment ahead of directional control valves and actuators. The round psi gauge gives a local pressure readout for setting and troubleshooting, and the 1/2 in PT port suits branch lines serving several valves from one take-off.
Sizing: the GFR family steps through sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in; this size 400 unit has a PT1/2 (1/2 in) port. Because AirTAC publishes flow as curves rather than a single rating, send us your flow demand and we will confirm sizing against the datasheet before you order. Drain: this unit carries the automatic drain, which expels collected condensate on its own; manual and differential-pressure drain versions exist in the family if you prefer a different regime.
Filter grade: the standard 40 um element is fitted here; specify code W for the 5 um element where finer filtration is needed. Gauge: a round gauge on a psi scale is fitted; the embedded square gauge and MPa or bar scales are the alternatives. Thread: PT is the standard on this model, with G (BSPP) and NPT available as order options. A mounting bracket is included, and the reverse/check valve (code K) is fitted.
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 figure, so we do not quote a number on the page. Send us your application details and we will confirm the datasheet flow curve and check the sizing against your demand before you order.
The automatic drain expels collected condensate from the bowl without anyone having to open it, which suits units mounted in awkward or infrequently visited spots. This model is supplied with the automatic drain; manual and differential-pressure drain versions are available in the GFR family if you prefer a different regime.
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.