The AirTAC GFR400-10 AirTAC Filter Regulator PT3/8, 5 um, Manual Drain 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 GFR400-10 is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 400 unit is fitted with a 3/8 in PT port, a 5 um filter element (code W) for finer filtration than the standard 40 um grade, a manual drain for positive bowl emptying, and the low-pressure regulator type for applications that set below the standard range. It comes with an external round gauge scaled in psi, a mounting bracket, and a PC (polycarbonate) bowl.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options including automatic, manual or differential-pressure drains, 40 um or 5 um elements, square or round gauges with MPa, psi or bar scales, G or NPT threads, and a reverse/check valve. Flow is published as curves rather than a single rating, so we confirm the datasheet figures for your application on request.
| Model | GFR400-10 AirTAC Filter Regulator PT3/8, 5 um, Manual Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (PT 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 — round, psi 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Filtering and regulating the air feeding a bench pneumatic press, where the 5 um element protects the valve and cylinder seals and the low-pressure type holds a modest setpoint for forming or staking work.
Conditioning compressed air at a laboratory bench manifold, where the 5 um grade keeps fine particulate out of instruments and the manual drain allows the technician to empty the bowl at the end of each session.
Supplying filtered, regulated air to the cylinder circuit of a carton-sealing conveyor, with the round psi gauge letting operators check supply pressure at a glance and the bracket mounting the unit beside the machine.
Size 400 with a 3/8 in PT port sits in the middle of the GFR range; step up to size 600 or down to 300/200 as your line's flow demand changes, and match the port to your piping (PT standard, with G and NPT available to order). This unit carries the 5 um element, the right choice when finer particulate removal matters; the standard grade is 40 um if your application tolerates it. The manual drain means an operator empties the bowl, which suits supervised installations; choose automatic or differential-pressure drain types where unattended drainage is preferred. The low-pressure regulator type is intended for lower set pressures - ask us to confirm the exact range for your setpoint. The fitted round gauge reads in psi; square gauges and MPa or bar scales are alternatives. A mounting bracket is included.
Because flow is published as curves rather than a single rating, ask us to confirm 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 GFR400 series as curves rather than a single rated figure, so no single number would be honest. Send us your flow demand and line pressure and we will confirm the sizing from the datasheet before you order.
The M in the code GFR40010MLC2W specifies a manual drain: an operator opens the drain to empty collected water from the bowl, which suits installations that are checked regularly. AirTAC also offers automatic and differential-pressure drain types in the same series if you prefer unattended drainage.
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.