The AirTAC GFR400C15ALC1WTK AirTAC Filter Regulator NPT1/2 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 AirTAC GFR400 series combines water and particulate filtration with pressure regulation in a single body. This unit is the 400 size with 1/2 in NPT ports, a 5 um filter element (code W), an automatic drain, and the low-pressure regulator type. A round pressure gauge scaled in MPa is fitted, a reverse/check valve is built in, and a mounting bracket is included. 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 port sizes from 1/8 to 1 in, and is ordered with your choice of drain type, filter grade, gauge style and scale, thread (PT standard, G or NPT), bracket and reverse/check valve. Rated flow is published as curves rather than a single figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR400C15ALC1WTK AirTAC Filter Regulator NPT1/2 |
|---|---|
| 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) |
On a paint line, the 5 um element keeps water and particulate out of atomizing nozzles while the low-pressure regulator holds a reduced, stable set pressure; the automatic drain clears condensate between shifts.
Quarter-turn pneumatic actuators on a plant's process skid often run at reduced supply pressure. This unit cleans the air, holds the low set point, and its fitted reverse/check valve backs the circuit.
Carton formers and case sealers on a 1/2 in air main use this unit to drop header pressure to the low level their cylinders and guide actuators need, with 5 um filtration protecting the control valves downstream.
The meaningful choices on this code are all decodable. Size 400 with 1/2 in NPT ports sits in the upper half of the GFR range - step up to 600 or down to 300 according to the flow your line needs, which we will confirm against the published curves. The 5 um element (W) suits points of use that see finer contamination than the 40 um standard element handles. The automatic drain (A) discharges condensate without operator attention, where a manual drain (M) or the differential-pressure default would need involvement. The low-pressure regulator type (L) is selected where the controlled pressure sits below the standard type's range - its exact adjustment range is not published, so ask us to confirm it. The round MPa gauge (C1), built-in reverse/check valve (K) and included bracket complete this configuration.
Thread is NPT on this unit; the GFR series is also catalogued with PT (the series standard) and G threads - order the suffix that matches your piping. Because flow is published only as curves, send us your flow and pressure conditions and we will confirm sizing from the datasheet before you commit.
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 GFR400 as curves across inlet and outlet pressures, not as a single rated number, so we do not quote a figure here. Send us your inlet pressure, set pressure and expected air consumption and we will read the curve and confirm sizing from the datasheet on request.
The L code selects the low-pressure regulator variant, intended for controlled pressures below the standard type's range. The exact adjustment range for this variant is not published in the catalogue, so we confirm it on request. The unit's maximum inlet pressure is 1.0 MPa (145 psi) and its working temperature range is -5 to 70 C, non-freezing.
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.