The AirTAC GFR400-10 AirTAC Filter Regulator 3/8 in NPT | 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 in the GFR400 series: 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 manual drain bowl, the standard 40 um filter element, and a round pressure gauge with an MPa scale. The manual drain means an operator opens the bowl drain to expel collected condensate, which suits installations visited as part of a routine maintenance round. The regulator is the standard type with an adjustment range of 0.05-0.9 MPa (7-130 psi), and no mounting bracket is included with this code.
This is a genuine AirTAC part. The GFR400 series is one of four sizes (200/300/400/600) in the GFR filter-regulator line, with port options from 1/8 in to 1 in, manual, automatic or differential-pressure drains, a 5 um element option, square or round gauges with MPa, psi or bar scales, and G (BSPP), NPT or PT threads. Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing). Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR400-10 AirTAC Filter Regulator 3/8 in NPT | 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 — round, MPa 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. 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. |
| 1 | Gauge scale: MPa. 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. |
| (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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Installed at the 3/8 in air drop feeding a production machine, the GFR400-10 filters pipe-scale and condensate from the supply and holds a stable set pressure for the machine's valves and cylinders, with the MPa gauge giving the operator a direct reading at the wall.
On a packaging or bottling line, this unit conditions the air feeding conveyor gate and stopper actuators: the 40 um element keeps debris out of the directional valves while the regulator holds the pressure the actuator circuit was set up for.
On a test bench or laboratory air supply, the manual-drain GFR400-10 lets a technician bleed accumulated condensate at the start of each session and dial in a repeatable regulated pressure for instruments and pneumatic fixtures.
Choose the size and port step against the air demand of the circuit: the GFR400 with its 3/8 in NPT port sits in the middle of the GFR range, above the 200/300 sizes and below the 600. Because flow is published as curves and not as a single rated figure, ask us to confirm sizing against your application before ordering. For the drain, manual (this code) suits attended installations; automatic or differential-pressure drains suit points that are not visited regularly. The standard 40 um element covers general protection; specify the 5 um option (code W) where finer filtration is needed. The round MPa gauge fitted here can be swapped for a square gauge or a psi or bar scale, and G (BSPP) or PT threads are available as alternatives to NPT. A mounting bracket can be added by ordering the version without the J code.
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 we do not quote a rated flow, Cv or SCFM number. Tell us your application and we will confirm the relevant datasheet flow figures on request before you order.
The M in GFR400-10MJC1T specifies a manual drain: an operator opens the bowl drain to expel collected water, which suits installations checked on a routine round. If the unit will sit unattended, the automatic (A) or differential-pressure (blank) drain versions expel condensate without operator action. All three share the same 0.05-0.9 MPa (7-130 psi) manual-drain-class adjustment range on this standard regulator, with a maximum inlet pressure of 1.0 MPa (145 psi) and a -5 to 70 C operating range.
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.