The AirTAC GFR400C10F3WTK AirTAC Filter Regulator NPT3/8, 5 um 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 See datasheet 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 GFR400C10F3WTK is an AirTAC GFR400 filter regulator: one body that removes water and particulate from compressed air and holds downstream pressure steady. This unit is tapped NPT3/8 (3/8 in), carries the 5 um filter element (code W), drains condensate by differential pressure, and is fitted with the embedded square gauge scaled in bar. A reverse/check valve is fitted, the polycarbonate bowl suits this size 400 unit, a mounting bracket is included, and the standard regulator covers 0.15-0.9 MPa (20-130 psi). Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, and options include 40 um or 5 um filtration, differential-pressure, automatic or manual drains, embedded square or optional external round gauges scaled in MPa, psi or bar, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm datasheet figures for your application.
| Model | GFR400C10F3WTK AirTAC Filter Regulator NPT3/8, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | See datasheet (PT 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 — factory standard, Factory standard scale |
| Reflux valve | Not fitted |
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. |
|---|---|
| C1 | Port size See datasheet. 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). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT thread. PT is the default; G is BSPP and T is NPT. |
| (blank) | No reverse-flow valve (the default). |
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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-C1 (two-unit set) |
Feeding clean, regulated air to the tool-changer, clamps and air-blast circuits of a CNC machining centre: the 5 um element strips water and fine particulate before they reach precision valves, while the regulator holds a steady set pressure for consistent clamping force.
Conditioning the air feed to spray guns on a paint or coating line, where moisture or dirt in the supply causes fisheyes and rejects. The 5 um element protects the atomizing air, the regulator holds gun pressure steady across a shift, and the check valve holds the setting if supply pressure dips.
Supplying regulated air to the cylinders and grippers of a packaging conveyor line. The filter stage keeps condensate out of directional valves, the regulator keeps cylinder speeds repeatable, and the 3/8 in NPT port suits the manifold feed of a mid-size packaging machine.
Size and port set the flow path: this unit is size 400 with a 3/8 in NPT port, and the family steps through sizes 200, 300, 400 and 600 as air demand grows. Drain type is a maintenance choice: differential-pressure (this unit), automatic for unattended condensate removal, or manual for periodic draining - note the manual-drain version widens the regulation range to 0.05-0.9 MPa (7-130 psi), while this differential-pressure unit regulates 0.15-0.9 MPa (20-130 psi). Filter grade is 40 um standard or 5 um (code W, fitted here) for finer protection. Gauges are embedded square as standard with an optional external round gauge, scaled in MPa, psi or bar (bar on this unit). Thread is PT as standard with G and NPT as order options, and a bracket is included unless code J specifies otherwise. Flow is published as curves, not a single rating, 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. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as curves rather than a single rated figure, so we do not quote a flow number here. Send us your required flow and working pressure and we will confirm the correct size and the full datasheet figures on request before you order.
The 5 um element removes finer particulate and passes less water and dirt downstream, which suits sensitive equipment such as valves, cylinders and spray guns. The 40 um element is the standard choice for general plant air. This unit is fitted with the 5 um element; the 40 um version is available in the same family if your application does not need fine filtration.
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.