The AirTAC GFR400C15MLF3WT 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 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.
GFR400C15MLF3WT is an AirTAC GFR400 filter regulator: a 5 um filter element and a low-pressure regulator combined in one body, sized for 1/2 in NPT ports. Water and particulate are stripped from the compressed air first, then the outlet pressure is set against the fitted square gauge, which reads in bar. This configuration carries a manual drain, a metal bowl and a mounting bracket included in the box. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, ordered with a choice of drain type, 40 um or 5 um filtration, gauge scale, thread (PT standard, with G and NPT as options) and bracket. Flow for GFR units is published as curves rather than a single rated figure, so ask us to confirm the datasheet and check sizing for your application.
| Model | GFR400C15MLF3WT AirTAC Filter Regulator NPT1/2 |
|---|---|
| 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) |
Clean, reduced-pressure air for the pusher and sealing cylinders on a carton case-packing conveyor line, with the 5 um element protecting downstream valves and the manual drain emptied during scheduled line checks.
Feeds pneumatic clamp cylinders on a machining fixture that must run below main header pressure; the operator sets the clamp point directly on the bar-scale square gauge at the unit.
Air preparation for a small pneumatic forming or marking press running at reduced pressure, with the metal bowl and included bracket allowing straightforward mounting beside the machine.
The real choices are size and port, drain, filter grade, gauge and thread. Size 400 with a 1/2 in port sits mid-range in the GFR200-600 ladder; if your line's air demand points to a different port step, the same functions exist in the neighbouring sizes. Flow is published as curves, not a single rating, so ask us to confirm sizing against the application before you order. Drain here is manual (code M): collected water is vented by hand, and automatic or differential-pressure drains can be specified instead. The W code selects the 5 um element over the 40 um standard.
The square gauge fitted reads in bar; an external round gauge with MPa, psi or bar scale is optional. Thread on this unit is NPT (PT is the standard, G is the other catalogue option), the mounting bracket is included, and no reverse/check valve is fitted. The L code marks the low-pressure regulator type; its exact setting range is not published in our data, so confirm it with us.
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 GFR flow as curves rather than a single rated figure, so we do not quote a number here. Send us your line's flow and pressure requirements and we will confirm the datasheet and check the sizing of GFR400C15MLF3WT against your application before you order.
The W code selects the 5 um element, which strips finer particulate and entrained water than the 40 um standard element. Choose it where downstream valves, cylinders or coating equipment are sensitive to fine contamination; the 40 um grade remains available across the GFR range where the finer grade is not needed.
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.