The AirTAC GFR400C15MLF3TK AirTAC Filter Regulator NPT1/2 Low-Pressure 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 See datasheet 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 GFR400C15MLF3TK is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 400 unit is built around a 1/2 in NPT port and is set up for low-pressure duty, with a manual drain on the metal bowl, a 40 um filter element, an embedded square gauge reading in bar, a reverse/check valve fitted and a mounting bracket included.
It is a genuine AirTAC part from the GFR range, which spans sizes 200 to 600 with port options from 1/8 to 1 in, a choice of manual, automatic or differential-pressure drains, 40 um or 5 um filtration, and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR400C15MLF3TK AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | See datasheet (PT 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 — factory standard, Factory standard scale |
| Reflux valve | Not fitted |
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. |
|---|---|
| C1 | Port size See datasheet. 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). |
| (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. |
| (blank) | PT thread. PT is the default; G is BSPP and T is NPT. |
| (blank) | No reverse-flow valve (the default). |
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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-C1 (two-unit set) |
Feeding a bench pneumatic press or clamping fixture where the air must be cleaned of water and particulate and the cylinder pressure held at a low, stable setting; the square bar gauge gives the operator a direct reading at the station.
Supplying atomising spray guns or coating heads that run at low regulated pressure; the 40 um element keeps particulate out of the air side and the manual drain lets operators bleed accumulated water at shift checks.
Regulating air to cylinders and diverters on a packaging or bottling conveyor, where the fitted reverse/check valve helps hold the downstream setting if the supply dips and the included bracket gives a tidy panel mounting.
Choose GFR by size and port: 200, 300, 400 and 600 step up in port and flow capacity, so match the size to the air demand of the circuit - this 400 unit carries a 1/2 in NPT port. Decide the drain: manual (this unit, opened by hand), automatic, or the differential-pressure default. Pick the filter grade - 40 um standard here, 5 um where finer protection is needed - and the gauge scale (MPa, psi or bar; this unit reads bar). Thread is NPT here; PT is the standard and G is also available. A low-pressure (L) regulator suits circuits set below the standard range; the exact range is not published, so confirm it with us. Because flow is published as curves rather than a single rating, ask us to check sizing against your application before ordering.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back 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 number here. Tell us your working pressure and air demand and we will confirm the sizing from the datasheet on request.
It marks the low-pressure regulator type. This unit filters to 40 um and regulates at settings below the standard type, with the exact range confirmed on request; the square gauge reads bar, and the manual drain is opened by hand to expel collected water.
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.