The AirTAC AirTAC GFR40015C3WTK 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 GFR40015C3WTK is a size 400 filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in a single body. This configuration is threaded NPT 1/2 in, carries the fine 5 um filter element (the W grade, against the 40 um standard), and drains its PC bowl by differential pressure, so condensate is expelled automatically whenever the pressure drop across the element warrants it. The regulator is the standard type with a 0.15-0.9 MPa (20-130 psi) adjustment range under a 1.0 MPa (145 psi) maximum inlet, and the fitted reverse/check valve holds downstream pressure if the upstream supply is lost. An external round gauge with a bar scale is included, and the unit ships with its mounting bracket.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um filtration, gauge styles and scales, PT, G or NPT threads, and an optional reverse/check valve. Flow is published as curves rather than a single rating, so ask us and we will confirm the sizing and datasheet figures for your application before you order.
| Model | AirTAC GFR40015C3WTK 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, bar 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. |
| 3 | Gauge scale: bar. 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) |
Point-of-use conditioning for the air feeding tool-clamp and pallet-change actuators on a machining centre: the 5 um element keeps fine contamination out of the clamping valves while the regulator holds a steady setting for repeatable clamp/unclamp cycles, and the check valve holds the circuit if the shop supply dips.
Conditioning the supply to the pneumatic cylinders and diverters on a packaging conveyor line: clean, regulated air keeps the stop-and-shift motions consistent through the shift, the differential-pressure drain clears condensate without an operator visit, and the 1/2 in port suits the line's main drop.
Feeding spray guns and air-driven booth equipment in a body shop: the 5 um grade cuts water and particle carry-over that would otherwise show in the finish, the regulator pins the gun supply pressure the painter sets, and the bar gauge gives a direct read at the booth wall.
Step up or down through the GFR sizes (200/300/400/600) to match the port and flow path your line needs; this size 400 unit sits at NPT 1/2 in. Choose the drain to suit access: differential-pressure (this unit, self-acting), automatic, or manual for attended installations. Pick the element grade - 40 um for general protection, 5 um (this unit) where downstream valves, cylinders or instruments want cleaner air. Decide on gauge style and scale (embedded square as standard, external round optional, in MPa, psi or bar - this unit has a round bar gauge), whether a reverse/check valve is worth having, and the thread: PT is the catalogue standard, with G (BSPP) and NPT (this unit) as order options; a bracket is included.
Because flow is published as curves rather than one rated figure, we do not quote a single flow number here. Send us your application and we will confirm sizing against the datasheet curves before you order.
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, not as a single rated figure, so we do not quote a flow number here. Tell us your application and we will confirm the sizing against the datasheet curves on request before you order.
The W code in GFR40015C3WTK selects the fine 5 um filter element instead of the 40 um standard, for applications that need cleaner air; the K code fits a reverse/check valve, which holds downstream pressure if the upstream supply is interrupted. Both are order options on the GFR400 series, alongside drain type, gauge style and scale, and PT, G or NPT threads.
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.