The AirTAC GFR400-15 AirTAC Filter Regulator PT1/2, Square psi Gauge 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. This size 400 unit has a PT1/2 port, a polycarbonate bowl with manual drain, a 40 um standard filter element, and a low-pressure type regulator fitted with an embedded square gauge reading in psi. A mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family spans sizes 200 to 600 with ports from 1/8 to 1 inch, a choice of manual, automatic or differential-pressure drains, 40 um or 5 um (W) filtration, gauge scales in MPa, psi or bar, and G or NPT thread options to order. Flow is published as curves rather than a single rating, so ask us to confirm figures from the datasheet for your application.
| Model | GFR400-15 AirTAC Filter Regulator PT1/2, Square psi Gauge |
|---|---|
| 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 | 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. |
| (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. |
| (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. |
| (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) |
On a CNC fixture line, the GFR400-15 filters shop air and holds a steady low-pressure clamp on the workpiece; the psi gauge lets operators verify the setting at a glance and the manual drain is emptied at scheduled shift checks.
Feeding a carton-sealing or wrapping machine, the unit strips water and debris before the directional valves and regulates supply to low-pressure actuators; the included bracket mounts it beside the machine's air inlet.
On a bottling conveyor with air-operated gates and pushers, the filter regulator supplies clean, controlled air to the cylinders; the PT1/2 port matches the main drop leg and the square gauge supports quick line-side verification.
Choose the size and port step (200 through 600, 1/8 to 1 inch) against the air demand of your circuit; the 400 size with PT1/2 suits mid-to-large supply lines. This unit is the low-pressure type, so confirm the control band you need with us before ordering. Drain is manual here - automatic (A) and differential-pressure (default) versions are available if the bowl cannot be drained by hand on a routine. The 40 um element is standard; specify W for 5 um. The embedded square gauge reads psi; MPa or bar scales and an external round gauge are options. PT is the standard thread; G (BSPP) and NPT are order options, and a no-bracket (J) variant exists. Flow is published as curves, not a single rating - send us your application and we will confirm sizing from the datasheet 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 G-series flow as curves rather than a single rated figure, so we do not quote a number here. Tell us your application and required flow and we will confirm the sizing from the datasheet on request.
This unit uses a manual drain: the bowl is emptied by hand at regular intervals, which suits installations that are checked routinely. If the unit is hard to reach or runs unattended, ask about the automatic (A) or differential-pressure versions instead.
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.