The AirTAC GFR400C15MLC3WTK AirTAC Filter Regulator NPT1/2, 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 GFR400C15MLC3WTK is an AirTAC GFR400 filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This configuration is built for 1/2 in NPT ports, carries the 5 um filter element (the finer of the two published grades), uses a manual-drain metal bowl, and is the low-pressure regulator type. It comes with a round gauge scaled in bar, a reverse/check valve fitted, and a mounting bracket included, for compressed-air service from -5 to 70 C (non-freezing) at up to 1.0 MPa (145 psi) inlet pressure.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and published options across drain type, filter grade, gauge style and scale, thread (PT standard; G and NPT are order options), and standard or low-pressure regulator types. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application.
| Model | GFR400C15MLC3WTK AirTAC Filter Regulator NPT1/2, 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) |
Filtered, regulated air to the clamping cylinders on a CNC fixture, with the 5 um element helping keep water and airborne grit out of the clamp valves and the check valve holding the circuit against backflow.
A low-pressure regulated supply for valve positioners and pilot actuators on a process skid, where the round bar gauge gives operators a direct local pressure readout at the panel.
Air preparation for diverter and pusher cylinders along a packaging line, with the manual-drain metal bowl emptied as part of the line's scheduled maintenance rounds.
Size and port step up together across 200, 300, 400 and 600; this unit sits at size 400 on 1/2 in NPT ports, so choose the size whose published flow curve covers your demand. Drain type is a real choice: this code is manual, meaning the bowl is emptied by hand, while automatic and differential-pressure drains are available on other codes. Filter grade is 5 um here (code W) against the 40 um standard. On the gauge, this code carries a round gauge scaled in bar; the embedded square gauge and MPa or psi scales are the other published choices. Thread is PT as the AirTAC standard, with G (BSPP) and NPT as order options - this code is NPT. The low-pressure regulator type is intended where downstream pressure must sit well below the 1.0 MPa (145 psi) maximum inlet; the exact adjustment range for the low-pressure type is not published, so confirm it with us. Flow is published as curves, not a single rating - ask us to check 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 GFR flow as curves rather than a single rated figure, so we do not quote a number here. Send us your line size, inlet pressure and air demand, and we will confirm the flow figures from the datasheet before you order.
This code is specified with a manual drain: the metal bowl is emptied by hand during routine maintenance, which suits lines that are checked on a fixed schedule. The same GFR400 family is also published with automatic and differential-pressure drains, so choose those codes if nobody is available to drain the bowl regularly.
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.