The AirTAC GFR400C10MLC3T 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 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 AirTAC GFR400C10MLC3T is a size 400 filter regulator: it removes water and particulate from compressed air and holds downstream pressure in a single body. This configuration has a NPT3/8 port, a manual drain on a polycarbonate bowl, a 40 um standard filter element, and the low-pressure regulator type. A round gauge with a bar scale is fitted, a mounting bracket is included, and the maximum inlet pressure is 1.0 MPa (145 psi). Operating temperature is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR series is offered in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, and with a choice of drain type, 40 um or 5 um filtration, gauge style and scale, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR400C10MLC3T AirTAC Filter Regulator NPT3/8, Manual Drain |
|---|---|
| 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) |
On a machining cell where clamping cylinders must see a deliberately low, steady supply pressure, this unit filters water and chips-laden particulate out of the shop air and holds the clamp circuit at the setpoint, with the bar gauge giving the operator a direct visual check at the fixture.
On a packaging line running small pusher and flap-fold cylinders, the low-pressure regulator keeps actuator pressure gentle enough to avoid crushing lightweight cartons, while the 40 um element stops pipe scale and moisture from scoring the cylinder bores.
In a process plant where pneumatic positioners and diaphragm-actuated control valves need clean air at a low, stable pressure, this filter regulator conditions the instrument-air branch, and the manual drain lets maintenance purge accumulated condensate during rounds.
The meaningful choices on this unit are all decodable from the code. Size 400 with a 3/8 in port suits lines whose air demand sits in that band - step up to size 600 or down to 300 if your flow curve says so. Manual drain means an operator opens the bowl drain during routine checks; if the unit is mounted where access is awkward, the same size is available with automatic or differential-pressure drain. The 40 um element is the standard grade; specify code W for 5 um where finer filtration matters. The fitted round gauge reads in bar; an embedded square gauge and MPa or psi scales are the alternatives, and G (BSPP) or NPT threads are ordered as options - PT is the standard thread. A mounting bracket is included. Because flow is published as curves, not a single rated figure, 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. 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 number, so we do not quote a figure here. Send us your line pressure, downstream demand and port size, and we will confirm the flow and datasheet figures for this exact unit on request.
The M in the code sets a manual drain: an operator opens the bowl drain during routine checks. If this unit will be mounted where regular access is awkward, the same size is available with automatic or differential-pressure drain - just order the corresponding code.
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.