The AirTAC GFR40010MLJF3WT AirTAC Filter Regulator NPT3/8 5um is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT3/8" ports, a manual drain and regulates 0.05 - 0.9 MPa (7 - 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 series combines water and particulate filtration with pressure regulation in a single body, so one unit both cleans the compressed air and holds your downstream pressure steady. This configuration is the 400 size with a 3/8 in NPT port, a 5 um filter element for finer particle capture than the standard 40 um grade, a manual drain you operate by hand to empty the PC bowl, and the low-pressure regulator type for circuits set below the standard range. The embedded square gauge is fitted with a bar scale, no mounting bracket is included, and no reverse/check valve is fitted. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating 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 port sizes from 1/8 in to 1 in, and each size can be ordered with your choice of drain type, filter grade, gauge scale, thread form (PT standard, G or NPT as options) and bracket. Flow is published as curves rather than a single rating, so ask us to confirm sizing or any datasheet figure against your application before ordering.
| Model | GFR40010MLJF3WT AirTAC Filter Regulator NPT3/8 5um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 130 psi) |
| Pressure type | Low-pressure 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, bar 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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. |
|---|---|
| 10 | Port size PT3/8". This body offers 10 = PT3/8", 15 = PT1/2". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (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. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Air-prep point for the clamp cylinders on a CNC fixture: the 5 um element keeps fine contamination out of the clamping valves while the low-pressure regulator holds a gentle, repeatable clamp pressure on the fixture.
Feeding the seal-and-fold cylinders on a carton packaging line: cleaned, regulated air at a low set pressure keeps the sealing action consistent, and the manual drain suits a line that is blown down at shift end.
Instrument and pilot-air supply inside a control panel: the 5 um grade protects small pilot valves and switches, the bar-scale square gauge gives a local set-point readout, and the low-pressure type matches circuits set below the standard range.
Start with the size and port: the 400 size with a 3/8 in NPT port sits in the middle of the GFR range, and the right step depends on the flow your line needs - we can check the published flow curves against your demand on request. Choose the drain to suit maintenance: manual (this unit) is emptied by hand and suits attended installations, while automatic and differential-pressure drains suit unattended duty. This unit carries the 5 um (W) element instead of the 40 um standard - pick 5 um where downstream valves and cylinders need finer protection. The gauge is the embedded square type with a bar scale; MPa and psi scales and an external round gauge are alternatives. This is the low-pressure (L) regulator type, so confirm its exact adjustment range with us before ordering. Thread here is NPT; PT is the standard form and G is also available. No bracket is included with this code - order one if you want panel or surface mounting.
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 GFR400 series as curves, not as a single rated figure, so we do not quote a number. Send us your application's flow demand and line pressure and we will confirm from the datasheet curves whether the 400 size with its 3/8 in port is correctly sized before you order.
The M in the code selects the manual drain: condensate collects in the PC bowl and is released by hand, which suits installations that are checked regularly. The same GFR400 size can be ordered with an automatic drain or with the default differential-pressure drain instead - just choose the matching code when you order.
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.