The AirTAC GFR400-15 AirTAC Filter Regulator 1/2 in PT is a genuine G-series filter regulator: water separation, 40 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 GFR400-15 is an AirTAC filter regulator: one body that removes water and particulate from compressed air and holds downstream pressure steady. This configuration is sized for 1/2 in PT ports, uses the standard 40 um filter element, and drains accumulated condensate by hand through the manual drain. The embedded square gauge reads in psi, a reverse (check) valve is fitted to hold downstream pressure if the supply drops, and no mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi), the regulator adjusts from 0.05 to 0.9 MPa (7-130 psi), and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl lets you see the condensate level.
This is a genuine AirTAC part from the GFR series, which is offered in sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in and PT, G (BSPP) or NPT threads, plus optional 5 um filtration, automatic or differential-pressure drains and alternative gauge scales. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application.
| Model | GFR400-15 AirTAC Filter Regulator 1/2 in PT |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (PT thread) |
| Filtering grade | 40 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. |
| J | Supplied without bracket. |
| (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. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Feeding a shop-floor pneumatic press: the 40 um element strips water and swarf from the compressed-air drop, the regulator holds a steady working pressure to the press cylinder, and the check valve keeps the circuit from collapsing on a supply dip.
Conditioning the 1/2 in air line serving a CNC machining cell: clean, regulated air to tool clamps and pneumatic actuators, with the psi square gauge giving operators a visible setpoint at the machine.
Supplying air to carton-forming and conveyor diverters on a packaging line: the filter-regulator keeps moisture and particles out of the valves while holding consistent pressure so the cylinders stroke predictably through the shift.
Size the unit by port and expected flow: 400 is the larger frame with a 1/2 in port, and the series steps 200/300/400/600 if your line uses a different port. Drain type is a real operating choice: a manual drain needs an operator to bleed the bowl, while automatic and differential-pressure drains discharge condensate without attention - note that the 0.05-0.9 MPa (7-130 psi) regulation range quoted here applies to this manual-drain unit. Filtration is 40 um standard; specify 5 um (code W) where finer cleaning is needed. The embedded square gauge reads psi; MPa or bar scales and an external round gauge are options. Thread is PT as standard, with G (BSPP) and NPT as order options. This unit is supplied without a mounting bracket. 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 this series as curves rather than a single rated figure, so no single flow number is quoted here. Tell us your line pressure and the flow your application needs and we will confirm the sizing from the datasheet before you order.
The M in the code selects the manual drain: an operator opens the drain to bleed collected condensate from the polycarbonate bowl. Automatic and differential-pressure drains are available on other GFR codes if you want unattended discharge. For this manual-drain configuration the regulator adjustment range is 0.05-0.9 MPa (7-130 psi).
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.