The AirTAC GFR400-15 AirTAC Filter Regulator NPT1/2 with Auto Drain 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 automatic 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 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 400-size unit is fitted with a 1/2 in NPT port, an automatic drain that expels collected condensate without manual attention, a 40 um standard filter element, an embedded square gauge scaled in bar, and a reverse/check valve that holds downstream pressure when the supply is lost. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulation range is 0.15-0.9 MPa (20-130 psi), and the operating temperature is -5 to 70 C (non-freezing). The polycarbonate bowl is suited to the 400 size; only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR family is available in 200, 300, 400 and 600 sizes with port options from 1/8 to 1 in, PT as the standard thread and G or NPT as order options, manual or differential-pressure drains as alternatives to the automatic drain fitted here, a 5 um element (code W) in place of the 40 um standard, and MPa or psi gauge scales. 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 NPT1/2 with Auto Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, bar 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". |
| A | Drain: Automatic 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Feeds clean, regulated air to the cylinders and grippers on a carton-forming and sealing line, with the automatic drain handling condensate through continuous shifts and the check valve holding set pressure if the supply drops.
Conditions the shop-air feed to a machining centre's pneumatic tool-change and clamping circuits, filtering water and swarf-laden particulate at 40 um and holding a stable regulated pressure for repeatable clamping.
Supplies filtered, regulated air to the diverters, stoppers and pushers along a bottling conveyor, with the automatic drain keeping the bowl clear during long production runs and the bar-scaled gauge giving operators a set-point reference.
Size and port are the first choice: step up through 200, 300, 400 and 600 as port size and required flow grow - this unit sits at the 400 size with a 1/2 in NPT port. Drain type is a real decision: the automatic drain fitted here suits unattended duty, while manual and differential-pressure drains are orderable alternatives. The 40 um element is the standard grade; specify 5 um (code W) where finer filtration is needed. The square gauge here is scaled in bar; MPa and psi scales are available, and an external round gauge is an option. PT is the standard thread, with G and NPT as order options - this unit carries NPT. A bracket is included; a no-bracket version (code J) exists.
Flow for this family is published as curves, not a single rated figure, 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 the GFR family as curves rather than a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the relevant flow and datasheet figures for the GFR400-15 on request before you order.
This configuration carries code A - an automatic drain that expels collected condensate on its own, which suits unattended or continuous-duty installations. Manual (code M) and differential-pressure (blank) drains are catalogue alternatives if you prefer to control drainage yourself.
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.