The AirTAC GFR400-10 AirTAC Filter Regulator PT3/8, Manual Drain 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 GFR400-10 is a filter regulator: it removes water and particulate from compressed air and sets downstream pressure in a single 400-size body with a PT3/8 (3/8 in) port. This configuration has a manual drain, so condensate collected in the PC (polycarbonate) bowl is released by opening the drain valve during inspection. The 40 um standard element handles general-purpose air preparation, the fitted round gauge reads outlet pressure in psi, and the built-in reverse (check) valve holds the downstream setting if upstream supply is interrupted. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator covers 0.05-0.9 MPa (7-130 psi), and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, a choice of manual, automatic or differential-pressure drains, an optional 5 um element (code W), embedded square or external round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Flow for this series is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application on request.
| Model | GFR400-10 AirTAC Filter Regulator PT3/8, Manual Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, psi scale |
| Reflux valve | Fitted (reverse flow permitted) |
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 0.05 - 0.9 MPa (7 - 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. |
|---|---|
| 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)). |
| (blank) | Standard 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. |
| 2 | Gauge scale: psi. 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. |
| K | Reverse-flow (reflux) valve fitted. |
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) |
Clean, regulated air for a directional-valve manifold on an automated assembly machine: the 40 um element keeps scale and pipe debris out of the valves, the regulator sets the circuit pressure, and the check valve holds the setting through brief supply dips.
Feeding air cylinders and clamps along a packaging or conveyor line, where the PT3/8 port matches typical branch drops and the manual drain suits a line checked at shift start. The psi gauge lets operators verify set pressure at a glance.
A point-of-use station on a factory compressed-air ring main: the filter regulator knocks out water and particulate carried from the compressor room and lets each workstation set its own pressure independently of the main line.
Start with the size and port: 400 is the third step in the GFR range (200/300/400/600), and the 10 code gives a PT3/8 port - step up to GFR600 if your line needs higher flow, or down to GFR300 for compact circuits. Drain type is a real operating choice: this unit has a manual drain, which suits installations with routine walk-round checks; choose automatic (A) or differential-pressure (blank) if the bowl should clear itself. The 40 um element is standard; specify 5 um (W) where downstream valves and cylinders need finer filtration. The fitted round gauge reads in psi; square embedded gauges and MPa or bar scales are alternatives. Thread is PT as standard, with G (BSPP) and NPT available to order, and note this configuration is supplied without a mounting bracket (code J).
One honest note on sizing: AirTAC publishes flow for the GFR series as curves, not as a single rated figure, so we do not quote a flow number here. Send us your application details and we will confirm the sizing against the datasheet curves before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as performance curves rather than a single rated figure, so we do not quote a flow number. Tell us your inlet pressure, set pressure and expected air demand, and we will confirm the sizing against the datasheet curves on request before you order.
The M in GFR40010MJC2K is the drain code: condensate in the PC bowl is emptied by opening the drain valve by hand, which suits stations inspected on a routine schedule (automatic and differential-pressure drains are available on other codes). The trailing K means a reverse (check) valve is fitted, holding the downstream pressure setting if the upstream supply drops.
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.