The AirTAC GFR400-10T 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 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 GFR400-10T is a size-400 filter regulator: water and particulate filtration plus downstream pressure regulation combined in a single body. This configuration is built with a 3/8 in NPT port, a manual drain bowl in polycarbonate, a standard 40 um filter element, the low-pressure regulator type, and a round pressure gauge reading in bar. The J code means no mounting bracket is supplied; the unit is intended to be mounted by its own connections or on an existing manifold or assembly.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch. Across the series you can order automatic or manual drainage, a 5 um element (code W), different gauge scales, G or NPT thread in place of the PT standard, and bracket options. Published flow data appears as curves rather than a single rating, so we confirm flow and datasheet figures for your application on request.
| Model | GFR400-10T AirTAC Filter Regulator NPT3/8 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 40 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 — round, 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). |
| C | Gauge shape: Round. 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. |
| (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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
A workholding or clamping press that runs its cylinders at reduced line pressure uses this unit to filter the supply and hold a gentle, stable setting, with the bar-scale gauge giving the operator a direct reading at the station.
On a cartoning or wrapping line, a 3/8 in feed to a group of actuators passes through this filter regulator, removing water and pipe scale while the manual-drain bowl is emptied during scheduled changeover checks.
A CNC machine's air preparation panel uses this combined filter and regulator to condition the supply feeding tool clamps and chip-sweep nozzles, keeping the downstream circuit clean and set without a separate filter and regulator pair.
Choose the size and port step against the air demand of the circuit: this unit is size 400 with a 3/8 in NPT port, one step up from the 300 series. Because flow is published as curves rather than a single rated figure, ask us to confirm sizing against your application before ordering. Drainage here is manual: the bowl must be drained by hand, which suits supervised installations; automatic or differential-pressure drainage is available on other codes if you prefer hands-off condensate removal. The element is the standard 40 um grade; a 5 um element (code W) is the option where finer filtration is required. This is the low-pressure regulator type, intended for circuits set below the standard range - we confirm the exact adjustment span on request. The gauge fitted is the external round type reading in bar; embedded square gauges and MPa or psi scales are the alternatives. Thread is NPT; PT (standard) and G are the other catalogue options.
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 details and we will confirm the flow and datasheet figures for this exact configuration on request.
The M code in GFR40010MLJC3T specifies a manual drain: condensate collected in the polycarbonate bowl is released by hand, which suits installations checked on a routine basis. If you want condensate removal without operator attention, order a GFR400 code with the A (automatic) drain instead - we can help you select the right variant.
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.