The AirTAC GFR400-15 AirTAC Filter Regulator G1/2 Low-Pressure 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 AirTAC GFR400-15 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body, so one component does both jobs on a 1/2 inch line. This configuration carries a G (BSPP) G1/2 port, a manual drain bowl in polycarbonate, the standard 40 um filter element, and the low-pressure regulator type for circuits that run below standard regulated pressures. A square pressure gauge is fitted and reads in psi, and the unit is supplied without a mounting bracket.
This is a genuine AirTAC part in the GFR400 size, the largest of the four GFR sizes (200, 300, 400, 600) published in the catalogue. Related configurations in the series cover automatic or differential-pressure drains, a 5 um element (code W), gauge scales in MPa or bar, an external round gauge, PT or NPT threads, and a bracket option. Flow is published as curves rather than a single rating, so we confirm the datasheet figures for your application on request.
| Model | GFR400-15 AirTAC Filter Regulator G1/2 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (G (BSPP) thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 130 psi) |
| Pressure type | Low-pressure 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 | 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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)). |
| L | Low-pressure 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. |
| G | G (BSPP) 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Feeds a low-pressure clamping or forming circuit on a packaging line: the 40 um element keeps water and mill-scale out of the press cylinder valves while the regulator holds a steady working pressure, and the psi gauge lets the operator verify the setpoint at a glance.
Sits at the drop for a bank of diverters, gates and stop cylinders on a distribution conveyor: filtration protects the directional valves from condensate and debris, regulation keeps actuation speeds consistent, and the manual drain is emptied during scheduled line checks.
Prepares air for a bench or pilot-scale coating, dosing or sampling rig where the process runs at reduced pressure: the low-pressure regulator type matches the modest setpoints, the 40 um element shields sensitive metering components, and the psi gauge supports setup and audit records.
Start with the port step: GFR sizes run 200, 300, 400 and 600, stepping up through 1/8 to 1 inch ports, and the 400 size with its G1/2 port suits lines whose flow demand sits above the 300 frame - match the size to the flow curve, not to pipe size alone. Choose the drain to match attendance: manual drain (this unit) needs someone to open it, automatic drains on their own, and differential-pressure drains sit between. Pick the element grade: 40 um standard for general air prep, 5 um (code W) where downstream valves and instruments need finer protection. This unit is the low-pressure regulator type; the exact adjustment range for that type is not published in our data, so confirm it against your set pressure before ordering. The fitted square gauge reads in psi; MPa and bar scales and an external round gauge are alternatives. Thread is G here, with PT as the catalogue standard and NPT orderable. A bracket is optional (not fitted here).
Because flow is published as curves rather than a single rated figure, ask us to confirm sizing against your application before you order.
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 figure, so we do not quote a number for this unit. Tell us your inlet pressure and the flow your line needs and we will confirm the sizing from the datasheet curves on request before you order.
The M in the code GFR40015MLJF2G specifies a manual drain: condensate collects in the polycarbonate bowl and is released by hand, which suits attended lines with scheduled checks. The same GFR400 size is available with an automatic drain (code A) or the differential-pressure drain (blank) if you want drainage without operator action - just order that variant.
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.