The AirTAC AirTAC GFR400C15LF1WTK Filter Regulator NPT 1/2 in 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 GFR400C15LF1WTK is a GFR-series filter regulator: water and particulate removal plus downstream pressure regulation in a single body. This size 400 configuration carries a 1/2 in NPT port, a 5 um filter element (grade code W, against the 40 um standard), a differential-pressure drain, a low-pressure regulator type, an embedded square gauge with MPa scale, and a fitted reverse (check) valve. Maximum inlet pressure is 1.0 MPa (145 psi), operating temperature is -5 to 70 C (non-freezing), the bowl is polycarbonate, and the mounting bracket is included.
This is a genuine AirTAC part. The GFR family runs from size 200 to 600 with ports from 1/8 to 1 in, and offers drain choices (differential-pressure, automatic, manual), 40 um or 5 um filtration, gauge and scale options, reverse-valve fitment and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and any datasheet figure against your application before ordering.
| Model | AirTAC GFR400C15LF1WTK Filter Regulator NPT 1/2 in |
|---|---|
| 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 clamps, vises and swing cylinders on a CNC machining cell with filtered, low-pressure regulated air, using the 5 um element to keep water and fine particulate out of clamp actuators and control valves.
Supplying case erectors, sealers and diverting cylinders on a packaging conveyor line, where the low-pressure regulator holds a gentle set pressure and the fitted check valve blocks reverse flow in the downstream circuit.
Point-of-use treatment at a paint finishing or coating station, where the 5 um grade protects spray guns and air motors from water and particulate and the regulator sets a lower working pressure for the job.
Sizing within the G-series starts with the port step: this unit is size 400 with a 1/2 in NPT port, above the 300 series and below the 600, so match the size to the air demand of the circuit rather than to the existing pipe alone. The real, decodable choices on this family are drain type (differential-pressure here; automatic or manual as alternatives), filter grade (5 um fitted here; 40 um standard), gauge scale (MPa here; psi and bar available), thread (PT standard; G and NPT as order options) and bracket fitment (included here). This configuration is the low-pressure regulator type with a reverse (check) valve fitted. Because AirTAC publishes flow as curves rather than a single rating, send us your flow and pressure requirements and we will confirm suitability from the datasheet before you order.
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 GFR400 flow as performance curves rather than a single rated figure, so we do not quote one number. Send us your line pressure, set pressure and expected air demand, and we will confirm the sizing from the datasheet on request.
The L code marks the low-pressure regulator variant, intended for applications set below the standard regulator's normal range. The exact regulated range for this low-pressure configuration is not published in the catalogue, so we confirm it on request. Everything else decodes normally: 1/2 in NPT port, 5 um element, differential-pressure drain, square MPa gauge and a fitted check valve.
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.