The AirTAC GFR40010AC3TK AirTAC Filter Regulator NPT3/8 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 PT3/8" 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 GFR40010AC3TK is a size 400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration has a 3/8 in NPT port, an automatic drain that expels collected condensate without manual attention, the standard 40 um filter element, a round pressure gauge reading in bar, and a built-in reverse/check valve that holds downstream pressure when the supply is lost. The polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part. The GFR line spans sizes 200, 300, 400 and 600, with port options from 1/8 in to 1 in, PT, G or NPT threads, manual, automatic or differential-pressure drains, a 5 um element option (code W), and gauge or no-gauge variants. Rated flow is published as curves rather than a single figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR40010AC3TK AirTAC Filter Regulator NPT3/8 Auto Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (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 — round, 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. |
|---|---|
| 10 | Port size PT3/8". 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). |
| C | Gauge shape: Round. 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 · PT3/8" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Feeds clean, regulated air to a CNC machining centre's tool-change and clamping circuits, with the automatic drain keeping condensate out of the valves during unattended shifts.
Conditions the air feeding pneumatic cylinders on a carton-forming and sealing conveyor, where the check valve holds actuator position if the plant air supply drops.
Installed at the air drop serving a robotic assembly cell, filtering water and particles from the header supply and setting the cell's working pressure on the bar gauge.
Size 400 with a 3/8 in port sits in the upper-middle of the GFR range; step up to size 600 or down to 300 depending on the flow your line needs - we will confirm the flow curve against your demand before you order. Drain choice matters: this unit's automatic drain suits unattended or hard-to-reach installations, while manual and differential-pressure drains are available if you prefer operator-controlled or demand-based purging. The standard element is 40 um; specify the W variant for 5 um if downstream equipment needs finer filtration. The round gauge here reads in bar; square embedded gauges and MPa or psi scales are alternatives. This code is NPT; PT is the standard thread and G (BSPP) is also an order option. A mounting bracket is included.
Flow for this family is published as curves, not a single rating, so send us your air demand and line pressure 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. 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 here. Send us your required flow and working pressure and we will confirm the datasheet curve for this 3/8 in size 400 unit on request.
The A in the code means the bowl drains itself: collected condensate is expelled automatically, so the unit suits installations that run unattended or are awkward to reach. Manual-drain and differential-pressure-drain versions of the same size 400 filter regulator are available if you prefer scheduled or demand-based draining.
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.