The AirTAC GFR400-15 AirTAC Filter Regulator 1/2 PT, 5 um, Auto Drain is a genuine G-series filter regulator: water separation, 5 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 GFR400-15 is an AirTAC GFR400 filter regulator: a 1/2 in (PT1/2) unit that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries the finer 5 um filter element, an automatic drain that expels collected condensate without manual attention, a low-pressure regulator, and a round gauge reading in psi. The bowl on this 400 size is polycarbonate (PC), and the unit is supplied without a mounting bracket.
This is a genuine AirTAC part from the G-series air-treatment line, which spans sizes 200 to 600 with ports from 1/8 to 1 in, a choice of drain types, 40 um or 5 um filtration, gauge styles and MPa/psi/bar scales, and PT, G or NPT threads. Max inlet pressure is 1.0 MPa (145 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 1/2 PT, 5 um, Auto Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (PT thread) |
| Filtering grade | 5 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. |
| J | Supplied without bracket. |
| (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. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Cleaning and regulating the shop-air branch that feeds tool-changer and clamping cylinders on a machining centre, with the 5 um element protecting fine pilot valves from particulate.
Conditioning the air feeding seal bars and nip-roller actuators on a form-fill-seal machine, where the automatic drain keeps condensate out of the valves on a line that runs unattended.
Filtering and regulating the low-pressure air drops at a paint finishing booth, where the 5 um grade helps keep water and dirt out of the atomising air and the psi gauge gives a familiar local readout.
Size 400 with a PT1/2 port suits circuits plumbed at 1/2 in; step up or down through the G-series sizes as your demand changes - we confirm sizing against the published flow curves before you order. The 5 um element (code W) is the finer option versus the standard 40 um grade, and the automatic drain suits installations that are not checked daily. This is the low-pressure regulator type; its exact adjustment range is not published, so confirm it with us against your set pressure. Thread is PT as standard, with G (BSPP) and NPT available as order options; this unit has no mounting bracket and a round psi gauge.
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 this series as curves, not as a single rated figure, so we do not quote a number here. 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 polycarbonate bowl on its own, so the unit does not need routine manual draining. The regulator on this model is the low-pressure type; AirTAC does not publish an exact adjustment range for it, so please confirm the range with us against the pressure your circuit requires.
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.