The AirTAC GFR400-15 AirTAC Filter Regulator, G1/2, 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 differential-pressure drain and regulates 0.15 - 0.9 MPa (20 - 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 size-400 filter regulator: it removes water and particulate from compressed air and sets downstream pressure in one body. This configuration has a G1/2 (BSPP) port, the standard 40 um filter element, a differential-pressure drain that bleeds condensate automatically as flow passes through, and an embedded square gauge reading in psi. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi) against a maximum inlet of 1.0 MPa (145 psi), and a reverse/check valve is fitted to hold the downstream setting if upstream pressure is lost. The polycarbonate bowl suits non-freezing compressed air from -5 to 70 C, and no mounting bracket is included in this code.
This is a genuine AirTAC part. The GFR family is also available in sizes 200, 300 and 600 with port options from 1/8 to 1 inch, G or NPT threads, manual or automatic drains, a 5 um (W) element, MPa or bar gauge scales, and low-pressure or no-gauge variants. Flow figures are published as curves rather than a single rating, so ask us to confirm sizing and datasheet details for your application before ordering.
| Model | GFR400-15 AirTAC Filter Regulator, G1/2, Square psi Gauge |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (G (BSPP) thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 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 | Differential-pressure 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 0.15 - 0.9 MPa (20 - 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". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 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. |
| 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Feeds clean, pressure-set air to the tool-clamp and actuator circuits of a CNC machining centre, with the check valve holding the set pressure if the shop main drops.
Conditions the air feeding pneumatic cylinders on a carton-forming and sealing conveyor, keeping water and debris out of the valves while the psi gauge lets operators verify the set point.
Supplies filtered, regulated air to spray guns in a finishing booth, where the 40 um element and stable downstream pressure support a consistent finish.
Start with size and port: the 400 size with its 1/2 inch G1/2 port sits in the middle of the GFR range (200/300/400/600), and the right step depends on the air demand of the line it feeds - we will check the published flow curves against your consumption if you send the figures. Next, choose the drain: this unit uses the differential-pressure drain, while automatic (A) and manual (M) versions exist; differential suits a steady, continuous flow, manual suits intermittent duty where an operator can bleed the bowl. The 40 um element is the standard grade; specify the 5 um W option only where finer pre-filtration is needed. The square gauge here reads psi; MPa and bar scales are available, and an external round gauge is an alternative. Thread is G (BSPP) on this code - PT is the catalogue standard and G or NPT are order options, so confirm the mating connection. Brackets are optional (this code omits one). Flow is published as curves, not a single rating, so ask us to confirm sizing against the 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, not as a single rated figure, so we do not quote a number. Send us your air consumption and line pressure and we will confirm the correct size from the datasheet curves on request.
This code has the differential-pressure drain, which discharges condensate automatically as air flows through the unit. If your duty is intermittent, the manual-drain (M) or automatic-drain (A) variants of the GFR400 may suit better - tell us the duty cycle and we will confirm the right option.
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.