The AirTAC GFR40015F3TK AirTAC Filter Regulator NPT1/2 Square Gauge 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 GFR40015F3TK is an AirTAC GFR400 filter regulator: one body that removes water and particulate from compressed air and then regulates downstream pressure. This size 400 unit is fitted with 1/2 in NPT ports, the standard 40 um filter element, a differential-pressure drain that bleeds collected condensate automatically as flow passes through, a square pressure gauge scaled in bar, and a reverse/check valve that holds the downstream setting when upstream pressure is lost. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulation 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 is protected by the included mounting bracket.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600, with port options from 1/8 to 1 in, manual or automatic drain variants, a 5 um (code W) element option, alternative gauge scales in MPa or psi, and G (BSPP) or NPT thread options to order. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application on request.
| Model | GFR40015F3TK AirTAC Filter Regulator NPT1/2 Square Gauge |
|---|---|
| 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 | Fitted — square, 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). |
| F | Gauge shape: Square. C is round, F is square. |
| 3 | Gauge scale: bar. 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 at a 1/2 in assembly-cell drop: the 40 um element strips water and pipe scale from the header supply, the regulator sets a stable working pressure for the cell, and the check valve holds that setting through compressor unload events.
Feeding cylinders and air-driven conveyors on a packaging or material-handling line, where the filter section keeps moisture and debris out of valve spools and the regulated output protects actuators from header-pressure swings.
Conditioning and regulating the air supply to pneumatic clamps and fixtures on a machining centre, with the bar-scaled square gauge giving the operator a direct readout of clamping pressure and the check valve maintaining clamp force if supply pressure dips.
Step up or down through the GFR sizes (200/300/400/600) so the port and the flow curve match your line demand; this unit sits at the 1/2 in NPT step. Drain choice matters: differential-pressure (as fitted here) suits steady flows, automatic (code A) suits intermittent or low-flow duty, and manual (code M) gives operator-controlled bleeding. The standard element is 40 um; specify the 5 um W grade where downstream equipment needs finer filtration. The embedded square gauge is standard (this unit scaled in bar; MPa or psi scales are orderable) with an external round gauge as an option. PT is the standard thread; G (BSPP) and NPT are catalogue options ordered by suffix, and a bracket is included. Flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
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 GFR400 series as curves, not as a single rated number, so we do not quote a rated flow, Cv or SCFM figure. Send us your line pressure, downstream set pressure and air demand, and we will confirm the flow from the datasheet and check the sizing for your application on request.
The differential-pressure drain (the standard, blank code) bleeds condensate from the bowl automatically whenever air flows through the unit, which suits continuously running lines. If your duty is intermittent or very low flow, the automatic drain (code A) is the better choice; the manual drain (code M) lets an operator bleed the bowl by hand and also widens the regulation range down to 0.05 MPa.
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.