The AirTAC AirTAC GFR400-15ALC2W Filter Regulator PT1/2, 5 um 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 AirTAC GFR400-15ALC2W is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is the size 400 unit with a PT1/2 (1/2 in) port, the low-pressure regulator type, a 5 um filter element (the tighter of the two published grades), an automatic drain that ejects collected condensate without manual attention, an external round gauge reading in psi, and a mounting bracket included. The polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um elements, standard or low-pressure regulation, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so we confirm the datasheet and sizing figures on request.
| Model | AirTAC GFR400-15ALC2W Filter Regulator PT1/2, 5 um |
|---|---|
| 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. |
| (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. |
| 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) |
Fixture clamps and swing cylinders on a CNC machining cell need clean, moisture-free air held at a gentle, stable pressure so soft jaws and delicate workpieces are not crushed. The 5 um element protects the clamp valves, the low-pressure type suits reduced-pressure circuits, and the automatic drain keeps condensate out of the fixture plumbing.
Carton formers, case packers and tray sealers run banks of small cylinders and air logic that foul quickly on dirty, wet air. Feeding the machine manifold through this filter regulator removes water and fine particles, holds the supply pressure steady for repeatable jaw and pusher action, and the psi gauge gives operators a readable setpoint.
Looms, stenters and spray-finishing lines often run air jets and applicators at reduced pressures where a standard regulator setpoint sits too high. This low-pressure type filter regulator on the 1/2 in drop to the line conditions the air, drains itself automatically across shifts, and lets the process hold the gentle pressure these machines expect.
Start with the port and size: this is the size 400 body with a PT1/2 port, the right step when your line runs 1/2 in piping and your air demand sits in the upper mid-range of the G-series ladder (sizes 200 to 600 step up in port and flow capacity together). Choose the drain to match attention on site: automatic (as here) drains itself, manual needs an operator, differential-pressure drains only when the element loads up. The 5 um element (code W) suits downstream equipment sensitive to fine particulate; the 40 um standard element suits general supply. The round psi gauge is the external option; an embedded square gauge with MPa, psi or bar scales is also available. PT is the standard thread, with G (BSPP) and NPT as order options, and a bracket is included.
One honest routing note: AirTAC publishes flow for this family as curves, not as a single rated figure, and the exact regulation range of the low-pressure type is not stated in the published data. Ask us to confirm flow and set-pressure figures against your application before ordering.
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 family as curves, not as a single rated number, so we do not quote a figure here. Tell us your line pressure and the air demand of your equipment and we will confirm the flow and sizing from the datasheet on request before you order.
The automatic drain (code A) ejects collected condensate on its own, so the PC bowl does not rely on an operator or on a pressure drop to empty it - useful on unattended or multi-shift installations. The W code selects the 5 um element instead of the 40 um standard, which is the right choice when downstream valves, cylinders or instruments are sensitive to fine particulate.
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.