The AirTAC GFR40015C1WTK AirTAC Filter Regulator NPT1/2 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 PT1/2" 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 GFR40015C1WTK is a size-400 filter regulator: it removes water and particulate from compressed air and holds a steady downstream pressure in one body. This configuration is built around a 1/2 in NPT port, the fine 5 um filter element (code W), a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element is high enough, and a round pressure gauge reading in MPa. The K code adds a reverse (check) valve, and a mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator covers 0.15-0.9 MPa (20-130 psi) with this drain type, and the working temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl keeps fluid level and drain condition visible at a glance.
This is a genuine AirTAC part. The GFR family is offered in sizes 200, 300, 400 and 600 with a choice of ports, drain types (differential-pressure, automatic or manual), 40 um standard or 5 um fine filtration, gauge style and scale, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application before you order.
| Model | GFR40015C1WTK AirTAC Filter Regulator NPT1/2 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT 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, MPa 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. |
|---|---|
| 15 | Port size PT1/2". 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. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Feeds the tool-clamp and chip-clearing circuits of a CNC machining centre: the 5 um element protects the clamp valves from grit and water, while the regulator holds a steady setting so clamping force stays repeatable across shifts.
Installed at the drop to a paint-booth air station, where the fine 5 um grade keeps moisture and particles out of the spray-air circuit and the regulator pins the line pressure the booth controls were set to.
Mounted ahead of the valve island on a cartoning or palletising machine: the check valve holds the downstream circuit if the plant supply dips, and the MPa gauge lets maintenance verify the setting without extra instruments.
Start with the port: this unit is the 1/2 in NPT version of the size-400 body, one step up from GFR300 and one below GFR600 - match the size step to the air demand of the circuit, and we will confirm the flow curve against your consumption before you order. Filtration choice is 40 um standard or the 5 um fine element fitted here; pick 5 um when downstream valves, cylinders or instruments need cleaner air. Drain choice is differential-pressure (fitted here), automatic, or manual - note that with automatic or differential drains the regulation range is 0.15-0.9 MPa (20-130 psi), while a manual-drain unit widens it to 0.05-0.9 MPa. The round MPa gauge fitted on this code can alternatively be ordered square, or in psi or bar scale. Thread is NPT on this model; PT is the catalogue standard and G (BSPP) is also available to order. A bracket is included, and the K code means a reverse/check valve is fitted to hold downstream pressure if the supply is interrupted.
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 performance curves, not as a single rated number, so we do not quote a figure here. Tell us your working pressure and air consumption and we will confirm the flow curve and datasheet figures for this exact model on request before you order.
The blank drain position on this code means the differential-pressure drain: condensate is discharged automatically when the pressure drop across the 5 um element builds up, with no operator intervention. If you prefer a fully automatic float drain or a manual drain (which also widens the regulation range to 0.05-0.9 MPa), those are catalogue options on the GFR400 - just ask and we will identify the right code.
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.