The AirTAC AirTAC GFR400-10 Filter Regulator 3/8 NPT, 5 um, Manual 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 GFR400-10 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is the size 400 unit with a 3/8 in NPT port, a fine 5 um filter element (the W grade, finer than the 40 um standard), a manual-drain polycarbonate bowl, an embedded square gauge reading in psi, a built-in reverse/check valve, and a mounting bracket included. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator adjustment range with manual drain is 0.05-0.9 MPa (7-130 psi), and the working temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part from the GFR filter-regulator family, published in sizes 200, 300, 400 and 600 with a choice of port sizes, PT, G or NPT threads, differential-pressure, automatic or manual drains, 40 um or 5 um filter grades, and gauges scaled in MPa, psi or bar. Flow is published as curves rather than a single rated figure; ask us and we will confirm the datasheet and sizing figures for your application on request.
| Model | AirTAC GFR400-10 Filter Regulator 3/8 NPT, 5 um, Manual |
|---|---|
| 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 | 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 — square, 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. 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) |
Filtered, regulated air feed to spray guns on a finishing line: the 5 um element keeps water carryover and particulate out of the finish, the regulator holds a steady gun pressure, and the operator drains the bowl manually at the end of each shift.
Conditioned air to the pneumatic cylinders of a carton sealer: the filter-regulator cleans the supply and holds consistent cylinder pressure so flap folding and taping stay repeatable, with the check valve holding downstream pressure if upstream supply dips.
Clean, adjustable air to a bench-top leak or pressure test rig: the 5 um grade protects sensitive test couplings and instruments, the psi-scaled gauge gives direct readout for test setups, and the manual drain suits intermittent, supervised use.
Start with size and port: the GFR series steps through sizes 200, 300, 400 and 600, each with larger ports and higher flow capacity, so match the size step to the air demand of the circuit rather than oversizing on guesswork. This unit is the size 400 with a 3/8 in NPT port. Next, drain type: manual drain means an operator drains the bowl by hand, while automatic and differential-pressure drains discharge condensate without intervention; note that the manual-drain version also allows adjustment down to 0.05 MPa (7 psi), lower than the 0.15 MPa (20 psi) floor of the auto and differential-pressure versions. Filter grade is 40 um standard or 5 um (W) for finer protection - this unit carries the 5 um element. Gauge scale is selectable (MPa, psi or bar; this unit is psi), thread is PT as standard with G and NPT as order options, and a bracket can be included or omitted. Flow for this family is published as curves, not a single rating, so send us your application details and we will confirm sizing against the datasheet 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 there is no one number we can honestly quote. Tell us your line pressure and the air demand of the equipment you are feeding, and we will confirm the sizing against the datasheet on request before you order.
The 40 um element is the standard grade and suits general plant air. The 5 um W grade fitted to this unit removes much finer particulate and is the usual choice where air feeds spray equipment, instrumentation, precision cylinders or other components that tolerate less contamination. Both grades are catalogue options across the GFR family, so you can pick per station.
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.