The AirTAC GFR400-15T AirTAC Filter Regulator NPT1/2 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 differential-pressure 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 GFR400-15T 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 NPT port, a 5 um filter element (the finer of the two catalogue grades), a differential-pressure drain that bleeds collected condensate automatically as flow passes through, and an external round pressure gauge scaled in MPa. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi) and an operating temperature of -5 to 70 C (non-freezing). The polycarbonate bowl keeps the condensate level visible at a glance.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600, with port sizes from 1/8 in to 1 in, PT (standard), G or NPT threads, 40 um or 5 um filtration, differential-pressure, automatic or manual drains, and square or round gauges in MPa, psi or bar scales. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR400-15T AirTAC Filter Regulator NPT1/2 5 um |
|---|---|
| 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 | 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, MPa 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. 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". |
| (blank) | Drain: Differential-pressure 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 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 on a machining centre's pneumatic supply: the 5 um element keeps fine particulate out of solenoid valves and air bearings, while the regulator holds a steady set pressure for tool-change and clamping circuits.
Conditioning the air feeding conveyor diverters, gate actuators and bag-sealing cylinders on a packaging line, where the 1/2 in port matches the main drop leg and stable regulated pressure keeps actuator timing consistent.
Installed at the take-off point of a factory air main to condition the branch feeding a work cell: water and particulate are stripped out and pressure is set locally, independent of fluctuations in the main header.
Start with the port step: this unit is size 400 with a 1/2 in NPT port, one step up from the 300 series, so it suits lines where your existing piping is 1/2 in and your flow demand is higher. Match the thread to your installation - NPT here, with PT (the catalogue standard) and G available to order. Choose the 5 um element (this unit) when downstream equipment such as precision valves or cylinders needs finer particulate removal than the 40 um standard grade; both grades remove water and particulate. The differential-pressure drain on this unit needs no operator attention, but if your compressor cycles lightly or the unit sits in an awkward position, an automatic or manual drain version may suit better. Gauges come as an embedded square gauge or an external round gauge (this unit) with MPa, psi or bar scales. A mounting bracket is optional (not fitted here).
One honest note on sizing: AirTAC publishes flow as curves, not as a single rated figure, so we cannot quote you a number in l/min or SCFM. Send us your application details and we will confirm the datasheet flow curves against your requirement 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 figure, so we do not quote a number in l/min, m3/h or SCFM. Tell us your application and required flow, and we will confirm the datasheet curves and sizing for this 400-size, 1/2 in unit on request before you order.
The 5 um element (code W) is the finer of the two catalogue filter grades - the standard is 40 um - so it suits downstream equipment that needs finer particulate removal. The differential-pressure drain is the default drain type: it bleeds condensate automatically as air flows through, with no operator input, unlike a manual drain you must open yourself.
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.