The AirTAC GFR40010C3WTK AirTAC Filter Regulator NPT3/8 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 PT3/8" 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 GFR40010C3WTK is an AirTAC GFR400 filter regulator: water and particulate filtration plus downstream pressure regulation combined in a single body. This configuration is built around a 3/8 in NPT port, a 5 um filter element (the finer of the two catalogue grades), and a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element rises. A reverse/check valve is fitted, holding the downstream setting if upstream supply is interrupted, and a round pressure gauge on a bar scale is included so the regulated outlet can be read at a glance. The pressure regulator adjusts from 0.15 to 0.9 MPa (20-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi), and the unit operates from -5 to 70 C in non-freezing conditions.
This is a genuine AirTAC part from the G-series air-treatment range. The GFR family is published in four sizes (200, 300, 400, 600) with port sizes from 1/8 to 1 inch, manual, automatic or differential-pressure drains, 40 um standard or 5 um fine filtration, embedded square or external round gauges in MPa, psi or bar scales, and PT, G or NPT threads. Flow figures for this series are published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR40010C3WTK AirTAC Filter Regulator NPT3/8 |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 5 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 — 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". |
| (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. |
| (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. |
| 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Feeding clean, regulated air to the tool-changer and clamping circuits of a machining centre, where the 5 um element protects close-tolerance cylinders and the check valve holds the clamp setting during a supply dip.
Conditioning the air feeding conveyor stoppers, diverters and carton-forming cylinders on a packaging line, with the regulator set to the actuator's rated pressure and the bar gauge giving operators a visible setpoint.
Installed at a drop leg serving a work cell in a general manufacturing plant, filtering pipe-scale and condensate out of the header air and regulating it locally before it reaches the cell's valves and cylinders.
Sizing a GFR400 starts with the port step: the 400 size carries a 3/8 in port, one step up from the 300 series, so choose it when your line runs larger piping or you expect flow near the top of the 300-size range. Because flow is published as curves and not as a single rated number, send us your application's flow demand and we will confirm the GFR400 curve against it before you order. The 5 um element (code W) suits downstream equipment sensitive to finer particles; the standard grade is 40 um if your application tolerates it. The differential-pressure drain on this unit needs no daily manual attention, but if your compressor cycles infrequently, ask about the manual-drain variant, which also widens the regulation range down to 0.05 MPa (7 psi). This unit ships as a standard-type regulator with a round bar-scale gauge, a fitted reverse/check valve and a mounting bracket included; NPT is the thread on this code, with G (BSPP) and PT available as order options.
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 performance curves rather than a single rated figure, so we do not quote one number. Send us your application's flow demand and port size and we will confirm the GFR400 datasheet curve against it before you order.
The blank drain position on this code means a differential-pressure drain: condensate is discharged automatically when the pressure drop across the 5 um element builds up, with no manual attention in normal service. If your air use is light or intermittent, the manual-drain variant is available in the same size and also extends the regulation range down to 0.05 MPa (7 psi).
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.