The AirTAC GFR400C10MLJNWT AirTAC Filter Regulator NPT 3/8 in 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 GFR400C10MLJNWT is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 400 unit is threaded NPT 3/8 in, carries the 5 um filter element (code W, against the 40 um standard), and has a manual-drain polycarbonate bowl. It is the low-pressure regulator type (code L); the exact regulation range for the low-pressure type is not published, so we confirm it on request. No gauge is fitted (code N), no reverse/check valve is fitted, and no mounting bracket is included (code J). Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR filter-regulator family spans sizes 200, 300, 400 and 600, with port sizes from 1/8 in to 1 in, and decodable options for drain type, filter grade, gauge and thread (PT is the standard; G and NPT are catalogue options). Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and any datasheet figure for your application before ordering.
| Model | GFR400C10MLJNWT AirTAC Filter Regulator NPT 3/8 in |
|---|---|
| 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) |
Placed on the supply to clamping cylinders on a machining fixture, this unit filters the shop air to 5 um and holds a low regulated pressure for the clamp circuit. The manual drain lets maintenance bleed accumulated water at the start of each shift, and the low-pressure type suits circuits that run well below full line pressure.
Mounted at the drop feeding a packaging machine's low-pressure actuator circuit, the filter regulator cleans the air and sets the working pressure for the machine's pneumatic valves and cylinders. The 5 um element protects valve seals from particulate, and the manual drain bowl is emptied during scheduled line cleaning.
Used to prepare pilot air for positioners and control valves on a process skid, this unit delivers filtered, regulated air at low pressure to the panel. The 5 um grade keeps fine pilot orifices clear, the NPT 3/8 in connection suits panel piping, and the absence of a gauge keeps the panel layout clean where a separate panel gauge is already fitted.
The real choices in this family are all decodable from the code. Step size (200/300/400/600) sets the port and the flow capacity, so match the size to the air demand of the circuit rather than to the pipe alone. Drain type matters: this unit is manual drain (code M), meaning someone bleeds the bowl on a schedule; the family also offers automatic drain (A) and the differential-pressure default. Filter grade is 40 um standard or 5 um with code W - this unit is the 5 um version, the right call where downstream valves and cylinders need finer protection. Gauges (embedded square or external round, in MPa, psi or bar scales) are options; this unit ships without one (code N). Thread is PT by default with G and NPT as options - this unit is NPT. Brackets are optional; none is included here.
Two honest notes before you order: this is the low-pressure regulator type (L), and its exact regulation range is not published, so confirm it with us against your set pressure. And because flow is published as curves rather than 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. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for this family as curves, not as a single rated figure, so we do not quote a flow number. Send us your application details - required flow, working pressure and downstream equipment - and we will confirm sizing against the datasheet curves on request before you order.
The N means no gauge is fitted on this unit, and none is included in the box. The GFR family offers gauge options - an embedded square gauge or an external round gauge, with MPa, psi or bar scales - as separate configurations. If you need a gauge on a size 400 NPT 3/8 in filter regulator, tell us your preferred scale and we will confirm the matching catalogue code on request.
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.