The AirTAC GFR400-10 AirTAC Filter Regulator NPT3/8 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 GFR400-10 is an AirTAC GFR400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is sized for 3/8 in NPT ports, drains by hand through the manual drain (you open it to expel collected condensate), filters to the standard 40 um grade, and carries a fitted reverse/check valve that holds the downstream setting if upstream pressure is lost. The embedded square gauge reads in bar, and the standard regulator covers an adjustment range of 0.05-0.9 MPa (7-130 psi). Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits clear condensate inspection; this size-400 unit ships without a mounting bracket.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drains, a 5 um optional filter grade (code W), square or round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR400-10 AirTAC Filter Regulator NPT3/8 Manual Drain |
|---|---|
| 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 | 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, bar 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). |
| F | Gauge shape: Square. 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. |
| 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) |
Feeding filtered, regulated air to a bench pneumatic press or clamping fixture, where the manual drain suits a cell that is purged at shift start and the check valve holds the set pressure if the supply drops.
Conditioning the air feeding directional control valves and cylinders on a packaging or cartoning line, protecting valve seats from water and scale while keeping actuator pressure steady at the set point.
Installed on an individual air drop serving a work cell or assembly station, so each station filters and regulates its own supply independently of the header, with local bar-scale readout at the gauge.
Size and port: the 400 series steps up in flow capacity and port size from the 200 and 300 series, and this unit takes a 3/8 in NPT connection - match the step to the air demand of the circuit rather than oversizing on guesswork. Drain: manual drain means an operator opens the bowl drain to purge condensate; choose automatic or differential-pressure drains where the unit is inaccessible or the supply runs continuously. Filter grade: 40 um is the standard element here; specify the W option for 5 um where finer particulate removal matters. Gauge: this unit carries the embedded square gauge scaled in bar; MPa and psi scales and an external round gauge are order options. Thread: PT is the AirTAC standard; G (BSPP) and NPT are catalogue options - this unit is ordered with NPT. Bracket: this configuration omits the mounting bracket; add it back if you want panel or surface fixing. Because flow is published as curves and not 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for this family as curves rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Tell us your application and required flow, and we will confirm the sizing against the datasheet curves on request before you order.
M is the manual drain: an operator opens the bowl drain to purge collected condensate, which suits accessible points purged on a routine. K means a reverse/check valve is fitted, so the downstream pressure setting is held if upstream supply is lost. If you would rather not drain by hand, automatic and differential-pressure drain versions are available in the same series.
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.