The AirTAC GFR40015F1WTK 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 GFR40015F1WTK is a size 400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries a 1/2 in NPT port, a fine 5 um filter element (the W grade, tighter than the 40 um standard), a differential-pressure drain that bleeds collected condensate automatically whenever the pressure drop across the element is high enough, an embedded square pressure gauge with MPa scale, and a built-in reverse/check valve that holds downstream pressure if the supply is interrupted. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi), the maximum inlet pressure is 1.0 MPa (145 psi), and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl on this size keeps the condensate level visible at a glance, and the mounting bracket is included.
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in up to 1 in, a choice of differential-pressure, automatic or manual drains, 40 um standard or 5 um fine filtration, square (embedded) or round (external) gauges with MPa, psi or bar scales, and PT, G (BSPP) or NPT threads to order. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR40015F1WTK 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 — square, 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). |
| F | Gauge shape: Square. 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) |
Feeding filtered, regulated air to the tool-clamp and pallet-change circuits of a CNC machining centre, where the 5 um element protects the directional valves from water and fine swarf-carrying condensate.
Regulating supply pressure to the cylinder-driven sealing, diverting and counting stations on a carton packaging conveyor, with the check valve holding actuator position during a compressed-air interruption.
A wall-mounted air preparation point at a manual assembly bench, where the square MPa gauge lets operators set and verify tool pressure and the differential-pressure drain keeps the bowl clear between shifts.
Start with the port and size: this unit is a size 400 with a 1/2 in NPT port, the right step when your line flow sits above what a 3/8 in unit can carry - match the size to the flow demand of the circuit. Choose the drain to suit access: differential-pressure (as here) needs no attention between pressure swings, automatic drains continuously, and manual suits attended installations. Choose the element grade: 40 um for general plant air protection, 5 um (this unit) where downstream valves and instruments need finer air. Gauge scale (MPa, psi or bar) and thread (PT standard, G or NPT to order) are decodable choices, and a bracket can be ordered where panel fixing is not used. Because flow is published as curves rather than a single rating, ask us to confirm sizing against your application 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 performance curves rather than a single rated figure, so we do not quote a l/min, m3/h or SCFM number. Tell us your line flow and working pressure and we will confirm the sizing against the datasheet curves on request before you order.
The W code in GFR40015F1WTK selects the 5 um fine filtration grade instead of the 40 um standard element. Choose 5 um where the downstream equipment - precision valves, air bearings, instrumentation - needs finer protection from particulate; 40 um is sufficient for general plant air. The drain on this unit is differential-pressure, which purges collected condensate automatically as the element loads up.
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.