The AirTAC GFR400-15 AirTAC Filter Regulator NPT 1/2 in, 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 filter regulator: it removes water and particulate from compressed air and holds downstream pressure at a set point, in one body. This 400-size unit is supplied with a 1/2 in NPT port, the finer 5 um filter element, a manual-drain polycarbonate bowl, and the low-pressure regulator type. A round pressure gauge scaled in MPa is fitted, a reverse/check valve is installed, and the 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 in, and catalogue options for drain type, filter grade, gauge style and scale, G or NPT thread, and bracket choice. Flow is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR400-15 AirTAC Filter Regulator NPT 1/2 in, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 5 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 — round, MPa 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. 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). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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) |
Conditioning the air feed to capping and indexing cylinders on a bottling line: the 5 um element screens water and particulate before they reach the directional valves, while the regulator holds the circuit at its set point.
Supplying filtered, regulated air to pneumatic clamps on a CNC machining cell, where the low-pressure regulator type suits circuits that hold a modest set point and the check valve helps hold the line if supply dips.
Feeding the diverter and stopper cylinders on a parcel-sort conveyor, with the manual-drain bowl bled during scheduled line checks and the gauge giving the operator a visible set-point reading.
Size and port step up together: 200 through 600, with this 400 unit on a 1/2 in NPT port - pick the size that matches the flow your line needs and confirm it against the published flow curves with us before ordering. Drain type matters: manual drains need a scheduled hand bleed, automatic drains handle condensate unattended, and the differential-pressure default suits steady duty - this unit is manual. The element here is 5 um (the W option); 40 um is the standard grade. The regulator is the low-pressure type; its exact adjustment range is not published, so confirm it with us if your set point is critical. The gauge is a round dial in MPa; the embedded square gauge and psi or bar scales are the other catalogue options. Thread is NPT here; PT is the standard and G (BSPP) is also available to order. Bracket included.
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, not as a single rated figure, so we do not quote a number here. Send us your required downstream flow, working pressure and set point, and we will confirm the correct size from the datasheet before you order.
This unit has a manual drain (code M): the bowl must be bled by hand at intervals to remove collected condensate. If you want drainage without operator attention, the same series is available with an automatic drain (code A) or the differential-pressure default - ask us to quote the 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.