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 manual drain and regulates 0.05 - 0.9 MPa (7 - 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 size 400 filter regulator that removes water and particulate from compressed air and sets downstream pressure in a single body. This configuration carries a 1/2 in NPT port, a 5 um filter element (code W), a manual drain on the bowl, and the standard regulator type with an adjustment range of 0.05-0.9 MPa (7-130 psi). No gauge is fitted (code N), so outlet pressure is read on your own instrumentation. The polycarbonate bowl is rated for a maximum inlet pressure of 1.0 MPa (145 psi), and the unit operates from -5 to 70 C in non-freezing conditions. A mounting bracket is included.
This is a genuine AirTAC part in the G-series filter regulator line, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in. Across the range you can order automatic, manual or differential-pressure drains, a 40 um standard or 5 um fine element, gauge and scale options, and PT, G or NPT threads. We confirm flow and other datasheet figures on request, since flow is published as curves rather than a single rating.
| 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 | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Not fitted |
| 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 0.05 - 0.9 MPa (7 - 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| N | No pressure gauge (N). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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) |
On a stamping or assembly press fed from a plant ring main, this unit filters incoming air to 5 um and holds a set regulator pressure for the press cylinders, with the manual drain bled at shift start.
On a carton-forming and sealing line, the GFR400-15T conditions the air feeding conveyor stop gates and case-erector cylinders, protecting them from water and fine particulate while regulating their supply pressure.
At a CNC or grinding cell, this filter regulator on the 1/2 in drop leg cleans the shop air and sets a stable pressure for tool clamping and air-blast circuits, with the 5 um element guarding the machine's pneumatic valves.
Size 400 with a 1/2 in port sits in the upper-middle of the G-series range; step up to 600 or down to 300 depending on the flow your line needs. This unit already carries the 5 um (W) element - choose it over the 40 um standard when downstream valves, cylinders or instruments need finer filtration. The manual drain suits installations where an operator can bleed the bowl on a routine; pick automatic or differential-pressure drain codes if the bowl is hard to reach. No gauge is fitted, so add your own or order a gauge variant with an MPa, psi or bar scale. The T suffix gives NPT threads; PT (standard) and G are the other order options, and the included bracket simplifies panel or wall mounting.
One honest note on sizing: flow for this family is published as curves, not a single rated figure, so ask us to confirm the datasheet flow 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 this family as curves rather than a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the datasheet flow figures for the GFR400 size before you order.
The M code fits a manual drain: an operator opens it to bleed collected water from the bowl. It suits accessible installations on a regular walk-round. If the unit is mounted out of reach, order the automatic (A) or differential-pressure (blank) drain variant instead.
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.