The AirTAC GFR400-10 AirTAC Filter Regulator NPT3/8 5um 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 configuration is the 400 size with a 3/8 in NPT port, a 5 um filter element (code W), a polycarbonate bowl with manual drain, the low-pressure regulator type, a round gauge reading in psi, and a built-in reverse (check) valve; no mounting bracket is included.
It is a genuine AirTAC part from the GFR range, which spans sizes 200, 300, 400 and 600 with port options from 1/8 to 1 in, PT as the standard thread and G or NPT to order. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm sizing figures from the datasheet for your application.
| Model | GFR400-10 AirTAC Filter Regulator NPT3/8 5um Manual Drain |
|---|---|
| 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 — 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. 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. |
| 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. |
| T | NPT 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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Point-of-use conditioning for a pneumatic valve actuation skid: the 5 um element protects the positioner and solenoid valves, the low-pressure regulator holds a gentle setpoint, and the built-in check valve helps hold downstream pressure if the supply dips.
Feeding a lab test bench or pilot rig where fine 5 um air and a low, stable setpoint are wanted: the round psi gauge gives a local reading at the bench, and the manual drain suits a supervised environment where an operator empties the bowl on a schedule.
A filter-regulator at the point of use on a packaging line drop: it dries and cleans the air feeding grippers and seal cylinders, lets a technician set the working pressure locally in psi, and the check valve prevents backfeed from downstream actuators during shutdown.
The real, decodable choices in this series are the size and port (200/300/400/600, 1/8 to 1 in - step up for higher flow), the drain type (differential-pressure, automatic or manual - this unit is manual), the filter grade (40 um standard or 5 um with W - this unit is 5 um), the gauge (embedded square as standard, external round optional, in MPa, psi or bar scales - here a round psi gauge), the thread (PT standard, G or NPT to order), and the bracket. Flow is published as curves, not a single rated figure, so please 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
Flow for the GFR400-10 is published as curves rather than a single rated figure, so we do not quote a number here. Send us your application details and we will confirm the sizing from the AirTAC datasheet on request.
L marks the low-pressure regulator type, intended for lower setpoints than the standard version, and M is the manual drain: you open it by hand to expel collected water instead of relying on an automatic or differential-pressure drain. This unit also carries a round gauge reading in psi and a reverse (check) valve.
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.