The AirTAC GFR400-15-T AirTAC Low-Pressure Filter Regulator NPT1/2 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 GFR400-15-T 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 ordered with a 1/2 in NPT port, a 5 um filter element (code W, versus the 40 um standard), an automatic drain that expels collected condensate without manual attention, and a low-pressure regulator fitted with an external round gauge scaled in bar. The bowl is polycarbonate (only size 600 uses aluminium alloy), no mounting bracket is included, maximum inlet pressure is 1.0 MPa (145 psi), and the operating temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part from the GFR series, offered in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options covering manual, automatic or differential-pressure drains, 40 or 5 um elements, PT, G or NPT threads, brackets, gauge styles and a reverse/check valve. AirTAC publishes flow for this series as curves rather than a single rated figure; ask us and we will confirm the flow and datasheet figures for your application.
| Model | GFR400-15-T AirTAC Low-Pressure Filter Regulator NPT1/2 |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT 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, bar 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. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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) |
Point-of-use conditioning ahead of pneumatic looms and doffing cylinders, where the 5 um element protects fine air jets and the low-pressure regulator holds a gentle, stable supply to the frames.
Conditioning the air feeding carton-sealing and case-erector cylinders on a packaging conveyor, with the automatic drain keeping condensate out of the directional valves during long unattended runs.
Supplying a bench pneumatic press or clamping fixture, where the low-pressure regulator holds a light clamping pressure and the round bar gauge gives the operator a direct pressure reading at the machine.
The real, decodable choices on this series: step between sizes 200/300/400/600 to match the port and flow path your line needs; choose the automatic drain (this unit) for unattended condensate removal, manual drain where you want a hands-on check, or the differential-pressure drain as the default; pick the 40 um standard element or the 5 um W grade for finer protection downstream; order PT (the standard), G or NPT thread; add or omit the bracket; and select the embedded square gauge or the external round gauge in MPa, psi or bar scales. This unit is the low-pressure type, so confirm the set pressure your equipment needs before ordering. AirTAC publishes flow as curves, not a single rating - ask us to confirm sizing against your application 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 rather than a single rated figure, so we do not quote a number here. Tell us your supply pressure and the air demand of your equipment and we will confirm the flow from the datasheet before you order.
This unit carries code A, the automatic drain, which expels collected condensate by itself. The GFR series also offers manual drain (code M) for hands-on checks and the differential-pressure drain (blank) as the default. Choose automatic for equipment that runs unattended, and manual where you inspect the bowl routinely.
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.