The AirTAC GFR400C10MLC3WT AirTAC Filter Regulator NPT3/8 Low-Pressure 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 See datasheet ports, a differential-pressure drain and regulates 0.15 - 0.9 MPa (20 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The GFR400C10MLC3WT is an AirTAC GFR400 filter regulator: filtration and pressure regulation combined in one body. It removes water and particulate from compressed air through a 5 um element (the finer of the two published grades) and holds a set downstream pressure, configured here as the low-pressure type for circuits that run below standard line pressure. The port is 3/8 in NPT, the metal bowl has a manual drain, an external round gauge reading in bar is fitted, no reverse/check valve is included, and a mounting bracket is supplied. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family covers sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options across drain types (differential-pressure, automatic, manual), filter grades (40 um standard, 5 um), standard or low-pressure regulation, embedded square or external round gauges in MPa, psi or bar scales, and PT, G or NPT threads. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application on request.
| Model | GFR400C10MLC3WT AirTAC Filter Regulator NPT3/8 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — factory standard, Factory standard 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 0.15 - 0.9 MPa (20 - 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. |
|---|---|
| C1 | Port size See datasheet. This body offers 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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. |
| (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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-C1 (two-unit set) |
Feeding low-pressure spray guns and air-assist nozzles on a paint or coating line: the 5 um element protects the gun from water and particulate, the low-pressure regulator holds a gentle set pressure at the gun, and the manual drain suits a booth where an operator drains the bowl at shift start.
Supplying filtered, reduced-pressure air to a test rig or pilot rig where readings are taken in bar: the round bar-scale gauge gives a direct read at the bench, the manual drain keeps condensate out of sensitive instrumentation, and the 3/8 in NPT port ties into standard bench piping.
Regulating air to gentle-action actuators on a packaging or cartoning line - hold-downs, pushers and flap folders that run at reduced pressure: the filter section shields valve spools from dirt and water, and the manual drain fits a machine serviced on a fixed maintenance round.
Every choice in this code is decodable. Size 400 with a 3/8 in port sits mid-range in the family; step the size and port up or down against the flow your line needs - we confirm sizing from the published flow curves on request rather than quoting a single rating. Drain type matters in service: this unit has a manual drain, which needs periodic draining by hand, while automatic and differential-pressure drains handle condensate with less attention. Filtration is 40 um standard or 5 um (this unit's W grade) where finer protection downstream is required. Regulation here is the low-pressure type; its exact adjustment range is not published, so confirm it with us against your set pressure. Gauges: an embedded square gauge is standard and an external round gauge is optional, in MPa, psi or bar scales - this unit carries a round gauge reading in bar. Thread is NPT on this model; PT is the standard thread and G (BSPP) is an order option. A mounting bracket is included. If you are unsure which combination fits, send us the application 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. 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 GFR series as curves, not as a single rated figure, so we do not quote a number that could mislead your sizing. Tell us your line pressure, set pressure and the equipment downstream, and we will confirm the flow figures from the datasheet for this exact configuration before you order.
A manual drain (code M) releases collected condensate only when someone opens it, which suits installations visited on a regular maintenance round. The family also offers an automatic drain and a differential-pressure drain (the default) that handle condensate with less attention. If the unit is mounted in a hard-to-reach spot or runs unattended for long periods, ask us about the automatic-drain variant of the same size.
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.