The AirTAC GFR400C15MJF3WTK AirTAC Filter Regulator 1/2 in NPT 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 GFR400C15MJF3WTK is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure at your setpoint in a single body. This 400-size unit is tapped 1/2 in NPT, carries the 5 um element (code W) in place of the standard 40 um, drains by hand through its manual drain, and shows setpoint on the fitted square gauge scaled in bar. A built-in check valve (code K) lets downstream air hold when upstream supply dips, and the unit is supplied without a mounting bracket (code J).
It is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um filtration, square or round gauges scaled in MPa, psi or bar, and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm sizing figures from the datasheet for your application.
| Model | GFR400C15MJF3WTK AirTAC Filter Regulator 1/2 in NPT |
|---|---|
| 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) |
Filtering and regulating the supply to a CNC machine tool's pneumatic clamps and tool-change cylinders. The 5 um element protects directional valves from fine particulate, and the built-in check valve holds clamp pressure through brief supply dips.
Regulating air to conveyor diverters and filling-head actuators on a bottling line. The manual drain suits a row where operators bleed the bowls as part of the shift walk, and the bar-scale gauge lets them verify setpoint at a glance.
Feeding regulated air to pneumatic press and fastening stations in an automotive assembly cell. The 1/2 in port serves the heavier tool circuit, and the check valve keeps downstream pressure stable when the main supply is cycled.
Size the unit by port and expected demand: this one is 400 size with a 1/2 in NPT port, while the smaller 200/300 and larger 600 sizes step the port and flow capacity up or down. The decodable choices on this code are: manual drain (the bowl is bled by hand on a routine, which suits points walked regularly by maintenance), 5 um filtration instead of the 40 um standard, a square gauge scaled in bar (MPa and psi scales are order options, as is an external round gauge), PT as the standard thread with G and NPT as order options, and no mounting bracket. For this manual-drain configuration the regulator adjustment range is 0.05-0.9 MPa (7-130 psi).
One honest note on sizing: AirTAC publishes flow for this family as curves, not a single rated figure, so ask us to confirm the sizing against your line pressure, setpoint and air demand 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 GFR400 as curves, not as a single rated figure, so we do not quote a number here. Tell us your line pressure, setpoint and air demand, and we will confirm the sizing from the datasheet with you before you order.
The M in GFR400C15MJF3WTK means the polycarbonate bowl drains by hand, which suits points that are checked routinely. The same 400-size body is orderable with an automatic or differential-pressure drain. Note that the manual-drain version also gives the wider regulator adjustment range of 0.05-0.9 MPa (7-130 psi).
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.