The AirTAC GFR400C15MNWT AirTAC Filter Regulator NPT 1/2 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 GFR400C15MNWT is an AirTAC GFR-series filter regulator: one body that removes water and particulate from compressed air and holds downstream pressure at your set point. This size 400 unit is threaded NPT 1/2 in and carries the 5 um element (grade W) rather than the standard 40 um, giving finer particulate removal ahead of sensitive downstream equipment. It uses a manual drain, so collected condensate is discharged by opening the drain at the bottom of the polycarbonate bowl during routine checks. No gauge is supplied with this configuration, and no reverse/check valve is fitted.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um filtration, PT, G or NPT threads, and gauge options. Maximum inlet pressure is 1.0 MPa (145 psi); with the manual drain fitted, the regulator setting range is 0.05-0.9 MPa (7-130 psi), and the working temperature range is -5 to 70 C, non-freezing. Flow for this series is published as curves rather than a single rating, so ask us to confirm sizing and the full datasheet for your application.
| Model | GFR400C15MNWT AirTAC Filter Regulator NPT 1/2 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) |
Cleaning and regulating the plant air feeding tool-clamp and tool-change cylinders on a CNC machining centre, where chips and condensate in the 1/2 in main must be stripped out and clamp pressure held steady cycle after cycle.
Conditioning the air that drives sorting and case-packing cylinders along a packaging conveyor, giving the line one point where water and particles are removed and actuator working pressure is set and held.
Serving as the filter-regulator at the air drop for a bench assembly cell, so hand-held pneumatic tools and small clamping fixtures receive clean air at a fixed, repeatable pressure from the workshop main.
Size and port: the 200/300/400/600 step increases port size and flow capacity; this unit is size 400 with a 1/2 in NPT thread (PT is the standard thread; G and NPT are order options). Drain: manual here - choose automatic or differential-pressure drain if the installation cannot rely on scheduled draining. Filtration: 5 um (W) is fitted; the 40 um standard grade is the choice where finer filtration is not required. Gauges: this configuration is supplied without a gauge; embedded square and external round gauges with MPa, psi or bar scales are catalogue options. A mounting bracket is included. Because flow is published as curves rather than a single rated figure, send us your supply pressure, set pressure and air demand 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 here. Tell us your supply pressure, set pressure and expected air consumption, and we will confirm from the datasheet whether this size 400, 1/2 in unit is correctly sized for your application.
The code M sets a manual drain: an operator opens the bowl drain to discharge collected water, which suits installations visited on a regular schedule; automatic or differential-pressure drains are catalogue alternatives for unattended duty. The W code selects the 5 um element instead of the standard 40 um grade, for finer particulate removal. Both choices are decodable from the model code, and this configuration is supplied without a gauge.
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.