The AirTAC GFR400C10MLF3TK AirTAC Filter Regulator NPT3/8 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 GFR400C10MLF3TK is an AirTAC GFR400 filter regulator: a single body that removes water and particulate from compressed air and then regulates downstream pressure. This size 400 unit is fitted with a 3/8 in NPT port, a manual drain bowl, the standard 40 um filter element, and a low-pressure regulator type for circuits set below the standard range. The embedded square gauge is included with a bar scale, a reverse/check valve is fitted, and a mounting bracket is supplied.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with a choice of port sizes, PT, G or NPT thread, manual, automatic or differential-pressure drains, a 5 um element option (code W), gauge scale options, and a reverse/check valve option. Flow is published as curves rather than a single rating, so we confirm flow and datasheet figures on request before you order.
| Model | GFR400C10MLF3TK AirTAC Filter Regulator NPT3/8 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) |
On a robotic welding cell, this unit filters moisture and swarf out of the drop feeding the gripper and clamp circuit, then holds the reduced working pressure those low-pressure actuators are set up for. The check valve holds the setting if upstream air dips.
On a carton-sealing or bagging machine, the film-seal cylinders and jaws run at a deliberately reduced pressure. This unit cleans the supply air and lets the line operator read and hold the sealing pressure on the bar-scale gauge.
At a paint booth drop, spray guns need clean, moisture-free air at a gentle, stable pressure. This filter regulator conditions the supply before the gun, and the manual drain suits a booth checked at the start of every shift.
Start with the port step: size 400 with a 3/8 in NPT port sits in the middle of the GFR range (200/300/400/600), so step up or down according to the air demand of the circuit; because flow is published as curves, not a single rating, ask us to confirm sizing against your application. Choose the drain: this unit has a manual drain, which suits positions someone visits routinely; pick automatic or differential-pressure drain codes where the bowl cannot be drained by hand. The 40 um element is standard here; specify the W code for the 5 um grade where finer filtration is needed. The square gauge is fitted with a bar scale, and MPa or psi scales plus an external round gauge are order options. Thread is NPT on this unit; PT is the standard and G is also a catalogue option. A mounting bracket is included.
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 G-series flow as performance curves rather than a single rated figure, so there is no one rated-flow number we can quote for this unit. Tell us your application and we will confirm the flow and datasheet figures for the GFR400 at 3/8 in on request before you order.
The M code in GFR400C10MLF3TK specifies a manual drain bowl: someone opens the drain by hand to expel collected water. If the unit sits where it cannot be visited regularly, order the automatic-drain (A) or differential-pressure-drain (blank) variant of the same GFR400 size instead.
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.