The AirTAC GFR400-15 AirTAC Filter Regulator 1/2 in PT, 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 GFR400-15 is a 400-size filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is fitted with a 5 um filter element (code W) for finer filtration than the standard 40 um grade, a manual drain on the PC bowl, a round external gauge with a psi scale, and a reverse/check valve (code K). The port is PT1/2 (1/2 in) with PT thread as the standard; G (BSPP) and NPT are catalogue options to order. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator adjusts from 0.05-0.9 MPa (7-130 psi), and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and options for drain type, filter grade, gauge style and scale, thread, bracket and reverse valve. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application on request.
| Model | GFR400-15 AirTAC Filter Regulator 1/2 in PT, 5 um |
|---|---|
| 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 | 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. |
| J | Supplied without bracket. |
| (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. |
| 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) |
Point-of-use clean-up and regulation of the compressed air feeding a CNC machine tool's pneumatic tool-changer and clamping circuits, with the 5 um element protecting fine pilot valves and the psi gauge giving the operator a direct setpoint readout.
Filtering and regulating the air that drives carton-forming and case-sealing cylinders on a packaging conveyor line, where the manual drain lets maintenance staff bleed accumulated condensate during scheduled changeovers.
Conditioning the compressed air feeding lab analysers and sample-handling pneumatics, where the 5 um filtration grade and stable regulated pressure from the standard regulator support consistent instrument operation.
Choose the 400 size with the 1/2 in PT port when your line flow and piping call for that step up from the 300 size; the right size is the one whose published flow curve covers your demand at working pressure. This unit has a manual drain, which suits installations where an operator can bleed the bowl on a routine; choose automatic or differential-pressure drain codes if the bowl must clear itself. The 5 um element (W code) is the finer choice over the standard 40 um grade when downstream valves and actuators need cleaner air. The round gauge here reads in psi; square embedded gauges and MPa/psi/bar scales are the other catalogue choices. PT is the standard thread, with G (BSPP) and NPT as order options, and this J-code unit has no mounting bracket. Because flow is published as curves and not a single rating, 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 rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Tell us your application and working pressure and we will confirm the datasheet flow curve and correct sizing for you on request.
The M code in GFR40015MJC2WK specifies a manual drain, so condensate in the PC bowl is released by hand. The GFR family is also catalogued with automatic drain (A) and differential-pressure drain (the blank default) options, which can be selected when ordering if the bowl needs to clear itself.
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.