The AirTAC GFR400-15 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 GFR400-15 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body, so a 1/2 in line can be cleaned and set with a single component. This configuration carries a 5 um filter element (the finer of the two catalogue grades), a differential-pressure drain that bleeds collected condensate automatically whenever the pressure drop across the element rises, and an embedded square pressure gauge scaled in MPa. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi), maximum inlet pressure is 1.0 MPa (145 psi), the polycarbonate bowl suits -5 to 70 C non-freezing service, and no mounting bracket is fitted.
This is a genuine AirTAC part in the GFR400 size class. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of 40 um or 5 um elements, differential-pressure, automatic or manual drains, square or round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Flow figures are published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR400-15 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 — square, 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). |
| F | Gauge shape: Square. 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) |
Cleaned and pressure-set air for tool clamps, pallet clamps and actuated guards on a machining centre's 1/2 in air main, with the 5 um element catching fine particulate before it reaches spool valves.
A single filter regulator feeding the cylinder banks on a carton-forming and sealing conveyor, holding a steady set pressure so case-ejector strokes stay consistent through the shift.
Conditioned air for purge and actuation circuits on analytical or test-bench equipment, where the 5 um grade and a stable regulated setting protect sensitive pneumatic controls downstream.
Start with the port and body size: GFR400 steps up from GFR300 for larger 1/2 in lines, and the right step depends on the flow your line actually draws - which is why sizing against the published flow curve matters more than the port number alone. Choose the drain: differential-pressure (this unit) drains on pressure drop and needs no attention, automatic drains on a cycle, and manual drain means someone opens it by hand. Choose the element: 40 um is the standard general-purpose grade; the 5 um fitted here suits finer downstream equipment. Pick the gauge and its scale (square embedded here, MPa scale; round external gauges and psi or bar scales are options), the thread (PT is the catalogue standard, G and NPT are ordered variants - this unit is NPT), and whether a bracket is needed (not fitted on this code).
One honest note before you order: AirTAC publishes flow as curves, not a single rated figure, so we cannot quote you a rated flow number. Send us your line size and demand and we will confirm the sizing from the datasheet before you commit.
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 GFR400 series as curves, not as a single rated number, so we do not quote a rated flow, Cv or SCFM figure. Send us your line size and air demand and we will confirm the flow figures from the datasheet for your application before you order.
The GFR400 series comes with a 40 um element as standard; the W code on this model specifies the finer 5 um grade, which suits more sensitive downstream equipment. The drain code is blank, meaning the differential-pressure type: condensate is discharged automatically when the pressure drop across the element rises, with no operator action needed. A manual-drain variant is available if you prefer to drain by hand.
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.