The AirTAC GFR400-15NTK 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 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 GFR400-15NTK is a size 400 filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has a 1/2 in NPT port, the standard 40 um filter element, and a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element is high enough. No gauge is fitted (code N), and a reverse/check valve (code K) is installed to hold the downstream setting if the upstream supply is lost. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator setting range is 0.15-0.9 MPa (20-130 psi), and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits sizes 200-400; only size 600 uses an aluminium alloy bowl.
This is a genuine AirTAC part from the G-series range, which spans sizes 200, 300, 400 and 600 with a choice of PT, G or NPT threads, manual, automatic or differential-pressure drains, a 5 um element option (code W), gauge and scale options, and a reverse/check valve option. Flow figures are published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR400-15NTK AirTAC Filter Regulator, NPT1/2 |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT 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 | Not fitted |
| 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. |
| N | No pressure gauge (N). |
| (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. |
| 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Point-of-use conditioning ahead of a machining centre's pneumatic valves and actuators: the 40 um element strips water and swarf-laden particulate from the shop-air drop, while the regulator holds a steady downstream setting for tool-change and clamping circuits.
Feeding the cylinders and grippers on a carton-forming or case-packing conveyor: the filter-regulator keeps condensate and pipe scale out of the valve manifold and maintains a consistent pressure so sealing and pusher strokes stay repeatable.
Installed at the wall drop feeding an assembly workstation's air tools and fixture clamps: the reverse/check valve holds the regulated setting during supply dips, and the differential-pressure drain keeps the bowl clear through a full shift.
Choose the size 400 / 1/2 in port step by matching the published flow curve for GFR400 against your line's air demand - we confirm the curve figures on request before you order. This unit carries the standard 40 um element; if your application needs finer filtration, the 5 um W-code variant is available in the same family. The differential-pressure drain suits most steady-duty installations; a manual-drain version widens the setting range to 0.05-0.9 MPa (7-130 psi), and an automatic drain is available for unattended duty. No gauge is fitted on this code, so add a gauge order if local pressure indication is needed. The NPT thread is an order option - PT is the catalogue standard, and G (BSPP) is also available. A mounting bracket is included.
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 G-series flow as performance curves, not as a single rated figure, so we do not quote one number. Send us your line's air consumption and working pressure and we will confirm the GFR400 curve data against your application on request before you order.
The N in GFR400-15NTK means no gauge is supplied, so the unit is set with your own downstream instrumentation or ordered with a gauge option separately. G-series regulator units accept an embedded square gauge or an external round gauge, with MPa, psi or bar scales - tell us which scale you prefer and we will confirm the matching order 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.