The AirTAC GFR400-10C2WK AirTAC Filter Regulator PT3/8 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 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 AirTAC GFR400-10C2WK is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 400 unit is threaded PT3/8 (3/8 in, PT standard; G and NPT threads are order options). The 5 um filter element (code W) gives finer filtration than the standard 40 um grade, the differential-pressure bowl drain bleeds accumulated condensate automatically as pressure drops, and the fitted round gauge reads in psi. A reverse/check valve is fitted, and a mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi); the standard regulator adjusts from 0.15-0.9 MPa (20-130 psi); operating temperature is -5 to 70 C, non-freezing. The polycarbonate bowl suits this size (only size 600 units use an aluminium alloy bowl).
This is a genuine AirTAC part. The GFR filter-regulator family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and can be ordered with 40 um or 5 um filtration, differential-pressure, automatic or manual drains, square or round gauges in MPa, psi or bar scales, and a reverse/check valve. Flow is published as curves rather than a single rated figure, so we confirm flow and datasheet figures on request before you order.
| Model | GFR400-10C2WK AirTAC Filter Regulator PT3/8 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (PT 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, psi 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. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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 a bench pneumatic press or clamping fixture: the 5 um element protects directional valves and cylinders from water and fine particulate while the regulator holds a steady working pressure for consistent forming and clamping force.
Supplying air to packaging and cartoning machines where cylinders and grippers run continuously: the filter regulator keeps moisture out of the valve bank and holds set pressure so pick-and-place and sealing motions stay repeatable through the shift.
Installed at the air drop to a CNC machine tool or machining centre: the unit conditions the supply before it reaches the machine's own valves and air bearings, with the psi gauge giving the operator a local pressure readout and the check valve holding downstream pressure if supply dips.
Choose the size and port step against the air consumption of the machine or line the unit feeds: this size 400 unit carries a 3/8 in PT port, and larger sizes give larger ports and more flow. This configuration is specified with 5 um filtration (W code) rather than the standard 40 um element - pick 5 um where downstream components need finer air, 40 um where general-purpose protection is enough. The differential-pressure drain is the default and needs no operator attention; automatic or manual drains are the other catalogue choices. The fitted round gauge reads in psi; square embedded gauges and MPa or bar scales are also available. PT is the standard thread, with G (BSPP) and NPT as order options, and the bracket is included. 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. 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 rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Tell us your inlet pressure and the air consumption of the equipment you are feeding, and we will confirm the correct size and the flow figures from the datasheet on request.
The W code specifies the 5 um filter element instead of the standard 40 um grade, giving finer filtration for sensitive downstream components. The K code means a reverse/check valve is fitted, which holds downstream pressure if the supply line loses pressure. The differential-pressure drain (the default, blank position) automatically bleeds collected condensate from the polycarbonate bowl as the pressure differential across the element rises.
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.