The AirTAC GFR400-15T AirTAC Filter Regulator, NPT 1/2 in, 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 GFR400-15T is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built in size 400 with a 1/2 in NPT port, carries the 5 um filter element (code W) for finer filtration than the standard 40 um grade, and uses a manual drain, so the bowl is emptied by opening its drain valve as part of routine checks. It is the low-pressure type, supplied without a gauge (code N) and without a reverse/check valve, and includes a mounting bracket. Maximum working (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. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and is available with different drain types, filter grades, gauge options and PT, G or NPT threads. Because flow is published only as curves rather than a single rated figure, contact us and we will confirm the flow and datasheet figures for this model against your application.
| Model | GFR400-15T AirTAC Filter Regulator, NPT 1/2 in, 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 | 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 | 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. 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| L | Low-pressure 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) |
Fixture clamps and swing cylinders that run at reduced supply pressure get both filtration and regulation from one body in the 1/2 in line feeding the fixture manifold, with the 5 um element protecting clamp-seal surfaces from particulate.
A packaging line's directional-valve island fed at 1/2 in benefits from water and fine-particle removal ahead of the valves, with the low-pressure regulator holding a gentle supply for delicate bag-forming and sealing actuators.
Blow-off nozzles and light pneumatic conveying points on a production line need clean, steady, reduced-pressure air; this unit filters to 5 um and regulates in one 1/2 in drop, with the manual drain emptied during scheduled checks.
Size and port: the 400 size steps up to a 1/2 in port, so choose it when your line's flow demand sits above what a 300-size unit serves; flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering. This unit's low-pressure type regulator suits circuits that run at reduced supply pressure - the exact adjustment range for the low-pressure variant is not published, so confirm it with us. The 5 um element (W) is the right choice when downstream valves or instruments need finer filtration than the 40 um standard; note the finer grade loads faster, which makes the manual drain's routine bowl-check interval worth planning into maintenance. No gauge is fitted under code N, so add a separate gauge if operators need to see set pressure. The thread here is NPT (code T); PT is the catalogue standard and G is also orderable. A mounting bracket is included.
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 G-series flow only as curves, not as a single rated number, so we do not quote a rated flow, Cv or SCFM figure. Send us your line pressure and flow demand and we will confirm the datasheet flow curve for this 400-size, 1/2 in unit against your application before you order.
The low-pressure type (code L) is the regulator variant intended for circuits that operate at reduced supply pressure; the exact adjustment range for this variant is not published, so confirm it with us. The manual drain (code M) means condensate is emptied by opening the drain valve during routine checks rather than automatically, and the 5 um element (code W) provides finer filtration than the 40 um standard. No gauge is fitted (code N).
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.