The AirTAC GFR400-15 AirTAC Filter Regulator PT1/2, 5 um Manual Drain 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 GFR400-15 is a filter regulator: water and particulate removal plus downstream pressure regulation in a single body. This 400-size unit is ported PT1/2 (1/2 in, PT thread standard), carries the 5 um filter element (code W) for finer filtration than the 40 um standard, and uses a manual drain, so the bowl is emptied by hand on a maintenance schedule. The regulator is the standard type with a 0.05-0.9 MPa (7-130 psi) adjustment range, and this configuration is fitted with an external round gauge scaled in psi. Maximum inlet pressure is 1.0 MPa (145 psi); operating temperature is -5 to 70 C, non-freezing. The bowl on this 400 size is PC (polycarbonate), and the mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um elements, embedded square or optional external round gauges (MPa, psi or bar scales), and PT, G or NPT threads. Flow for this model is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures against your application on request.
| Model | GFR400-15 AirTAC Filter Regulator PT1/2, 5 um Manual Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (PT 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 | Fitted — round, psi 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 0.05 - 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. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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) |
Feeding clean, regulated air to a machining centre's tool-change cylinders and pneumatic clamps, where the 5 um element keeps fine contaminants out of directional valves and the psi gauge gives operators a visible setpoint.
Regulating supply pressure to a workholding clamp or light pneumatic press on a production line, with the 1/2 in port matching the main drop and the manual drain emptied during scheduled changeover.
Conditioning air for conveyor diverters, case packers and bagging heads, where stable regulated pressure keeps seal cylinders and stopper gates repeating consistently through the shift.
Work through the decodable choices in order. Size and port: this 400 unit is PT1/2; step up to size 600 or down to 300/200 depending on the flow your circuit needs - we will check the published flow curve against your demand before you order. Drain: manual (this code) means hand-draining the bowl at intervals; choose automatic or differential-pressure drain if you want condensate removed without operator action. Filter grade: this unit has the 5 um element (W); the 40 um standard element suits general prep, while 5 um protects finer valves and instruments. Gauge: an external round gauge scaled in psi is fitted here; embedded square gauges and MPa or bar scales are alternatives. Thread: PT is standard; G (BSPP) and NPT are order options. Bracket is included. Flow is published as curves, not a single rating, so ask us to confirm sizing against the 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 the GFR series as curves, not as a single rated number, so we do not quote a l/min or SCFM figure. Tell us your application and required flow and we will confirm the datasheet curve figures for this 400-size, 1/2 in unit on request before you order.
The manual drain (code M) means condensate is emptied by hand on a maintenance schedule, which suits lines that are checked regularly. If you want drainage without operator action, the same GFR400-15 body is available with an automatic drain (A) or the differential-pressure drain that is the series default - just specify the drain code when ordering.
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.