The AirTAC GFR400C15MF3WTK AirTAC Filter Regulator NPT1/2 5 um 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 GFR400C15MF3WTK is an AirTAC GFR400 filter regulator: one body that removes water and particulate from compressed air and holds the downstream pressure steady. This configuration is built around a 1/2 in NPT port, a 5 um filter element (the finer of the two published grades), a manual drain on the bowl, an embedded square gauge reading in bar, and a built-in check valve that holds the downstream setting if the upstream supply dips. Maximum inlet pressure is 1.0 MPa (145 psi), the regulator adjusts from 0.05 to 0.9 MPa (7-130 psi), and the unit operates from -5 to 70 C in non-freezing conditions. The bowl on this 400 size is polycarbonate, and a mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and each size can be ordered with a different drain type, filter grade, gauge scale, thread (PT standard; G and NPT as options) and bracket arrangement. AirTAC publishes flow for these units as curves rather than a single rated figure, so ask us to confirm the datasheet and flow data for your operating conditions before ordering.
| Model | GFR400C15MF3WTK AirTAC Filter Regulator NPT1/2 5 um |
|---|---|
| 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) |
At a paint line's spray-booth drop, the unit strips water and 5 um particles from the air feeding the spray guns and holds a steady regulated pressure, so atomising air stays consistent across a shift. The bar-scale gauge gives operators a direct reading at the point of use.
On a bottling hall conveyor section, the regulator sets the pressure to the pneumatic cylinders that stop, index and divert bottles, while the 5 um element keeps pipe scale and sludge out of the cylinder valves. The built-in check valve holds the setting through brief supply dips.
On a lab bench that cycles pneumatic components, the unit provides a clean, manually adjustable supply: the 5 um element protects the device under test, the square bar gauge gives a direct pressure reading, and the manual drain suits intermittent, supervised bench use.
Start with the port step: GFR comes in sizes 200, 300, 400 and 600 covering 1/8 to 1 in ports, and the right size is the one whose flow curve covers your demand at an acceptable pressure drop - we can check that against the datasheet on request. Drain type is a real choice: manual (as here) means an operator drains the bowl, while automatic and differential-pressure drains vent collected water without attention. Filter grade is 40 um standard or 5 um (this unit); the finer element suits downstream instruments and valves. Gauges are embedded square as standard with MPa, psi or bar scales, and an external round gauge is optional. Thread is PT as the catalogue standard with G (BSPP) and NPT as order options, and a bracket can be included or omitted. A reverse/check valve can also be fitted, as on this unit, to hold the downstream setting through supply dips.
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 rather than a single rated figure, so there is no one number we can state honestly. Send us your inlet pressure, set pressure and expected air demand, and we will confirm the sizing from the datasheet before you order.
Manual drain means an operator opens the drain at the bottom of the bowl to release collected water. It suits installations that are checked regularly or run intermittently. If the unit will sit unattended, the automatic or differential-pressure drain versions of the same GFR400 size remove the need for routine draining.
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.