The AirTAC GFR400-15 AirTAC Filter Regulator, G1/2, 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: it removes water and particulate from compressed air and sets a stable downstream pressure in a single 400-size body with a 1/2 in G-thread port. This configuration carries the 5 um filter element (code W) for finer filtration than the standard 40 um grade, a manual drain on the PC bowl, an embedded square gauge reading in psi, and a built-in reverse/check valve (code K) that holds downstream pressure when the upstream supply is lost. The standard regulator covers 0.05-0.9 MPa (7-130 psi) with this manual-drain version, maximum inlet pressure is 1.0 MPa (145 psi), and the working temperature range is -5 to 70 C, non-freezing. The polycarbonate bowl suits this size; only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of drain types, 40 um or 5 um filtration, gauge scale options, and PT, G or NPT threads. Flow is published in the catalogue as curves rather than a single rated figure, so we confirm the datasheet and flow data for your application on request.
| Model | GFR400-15 AirTAC Filter Regulator, G1/2, 5 um, Manual Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (G (BSPP) 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 — square, psi scale |
| Reflux valve | Fitted (reverse flow permitted) |
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). |
| F | Gauge shape: Square. 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. |
| G | G (BSPP) thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
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) |
Filtered, regulated air feeding pneumatic clamping fixtures on a machining centre, where the 5 um element and check valve help keep the clamping circuit clean and hold pressure if the main supply drops.
A point-of-use filter regulator supplying the cylinder actuators on a packaging conveyor's taping and folding heads, with the psi gauge letting line staff set and verify working pressure.
Regulated supply at individual workstations on an assembly floor, where each drop needs its own pressure setting and clean air for hand tools and small actuators.
Start with the port and size: 400 is the second-largest GFR frame, and the 15 code gives a 1/2 in port - step up to 600 or down to 300 depending on the flow your line needs. Choose the drain to match the installation: manual (as here) needs an operator to drain the bowl, automatic drains on a cycle, and the default differential-pressure drain uses the pressure drop across the element. Pick the element grade: 40 um is standard for general supply air, 5 um (code W, as on this unit) when downstream equipment needs finer filtration. Set the gauge scale - MPa, psi or bar - and decide between the embedded square gauge (standard) and the optional external round gauge. Select the thread for your piping: PT is the standard, with G (BSPP) and NPT available as order options; a mounting bracket is included unless code J is specified. Flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as curves in the catalogue, not as a single rated number, so we do not quote a figure here. Tell us your application and we will confirm the flow data from the datasheet for this 400-size, 1/2 in port unit on request.
The M in the code specifies a manual drain on the bowl: an operator opens it to remove collected water, which suits installations that are checked as part of a routine. Note that with a manual drain the regulator adjustment range is 0.05-0.9 MPa (7-130 psi). If the unit is mounted where regular access is difficult, ask us about the automatic or differential-pressure drain versions of the same size.
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.