The AirTAC GFR400-15T AirTAC Filter Regulator 1/2 in NPT, 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 filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in a single body. This size 400 unit is specified with a 1/2 in NPT port, a 5 um filter element for finer particle capture than the 40 um standard, a manual drain for the polycarbonate bowl, and a round pressure gauge scaled in MPa. The standard regulator covers a 0.05-0.9 MPa (7-130 psi) setting range with manual drain, and maximum inlet pressure is 1.0 MPa (145 psi). Operating temperature is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR line is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, gauge style and scale options, G or NPT thread variants, and bracket or no-bracket mounting. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR400-15T AirTAC Filter Regulator 1/2 in NPT, 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 | 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 0.05 - 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. |
| 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) |
On a carton packaging line, filtered and regulated air feeds the stopper, clamp and pusher cylinders that index product along the conveyor. The 5 um element keeps fine debris out of the valve spools, and the manual drain lets the shift operator blow down the bowl at start-up.
In a fabrication cell, a bench-mounted filter regulator conditions the air feeding a small pneumatic press and its clamping fixtures. The regulator holds a consistent clamping pressure at the die, and the included bracket fixes the unit to the machine frame beside the drop.
For automated laboratory equipment using pneumatic grippers and sample-handling actuators, this unit cleans the shop air down to 5 um and sets a stable, low working pressure for the delicate motion stages. The MPa-scaled round gauge gives a clear setpoint readout at the panel.
Start with the port step: size 400 with a 1/2 in port sits in the middle of the GFR range, so step up to size 600 or down to size 300 depending on the flow your line needs - we can check the published flow curves against your demand before you order. Drain choice matters: this unit has a manual drain, which suits attended installations where an operator blows down the bowl; choose automatic or differential-pressure drain for unattended duty, and note the manual-drain version also widens the regulation range down to 0.05 MPa. The 5 um element (code W) is the right pick when downstream valves and cylinders need finer protection than the 40 um standard; use 40 um where coarser pre-filtration is acceptable. Gauge options are the embedded square gauge or an external round gauge, with MPa, psi or bar scales - this configuration carries a round gauge in MPa. Thread is NPT here; PT is the catalogue standard and G (BSPP) is also orderable. A mounting bracket is included with this code, and a reverse/check valve can be specified if you need one.
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 performance curves, not as a single rated number, so we do not quote a figure here. Tell us your line's air demand and working pressure and we will confirm the sizing against the datasheet curves on request before you order.
The manual drain (code M) means an operator opens the bowl drain to release collected water - ideal for attended machines on a daily check routine, and it also extends the regulation range down to 0.05 MPa (7 psi). The 5 um element (code W) captures finer particles than the 40 um standard element, giving better protection for precision valves and cylinders downstream.
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.