The AirTAC GFR400-15 NPT AirTAC Filter Regulator, 1/2 in, 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 PT1/2" ports, a manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR400-15MC2T is a filter regulator: one body that removes water and particulate from compressed air and holds downstream pressure at your set point. This configuration is built for 1/2 in NPT ports, drains its polycarbonate bowl manually, filters to the standard 40 um grade, and carries a round psi gauge for setting and monitoring pressure. The standard-type regulator adjusts from 0.05-0.9 MPa (7-130 psi), maximum inlet pressure is 1.0 MPa (145 psi), the working temperature range is -5 to 70 C (non-freezing), and a mounting bracket is included.
This is a genuine AirTAC part in the GFR400 size class, one of four sizes (200/300/400/600) that step up in port and flow. Across the range you can order G or NPT threads, automatic or differential-pressure drains, a 5 um element (code W), alternative gauge scales, or a reverse/check valve. Rated flow is published as curves rather than a single figure, so ask us to confirm sizing and datasheet figures for your application.
| Model | GFR400-15 NPT AirTAC Filter Regulator, 1/2 in, Manual Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, psi 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 0.05 - 0.9 MPa (7 - 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. |
|---|---|
| 15 | Port size PT1/2". This body offers 10 = PT3/8", 15 = PT1/2". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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 · PT1/2" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Point-of-use filter regulator on a 1/2 in branch feeding CNC machine pneumatic valves, keeping water and swarf-carried contamination out of the valve train while the operator holds a fixed set pressure.
Filtered, regulated air for the pick-and-place cylinders on a carton packaging conveyor, where line pressure is set once and the manual drain is emptied during scheduled shift checks.
Air prep ahead of a bench-mounted pneumatic press, filtering shop air to 40 um and giving the operator a psi gauge to set and verify clamping pressure job by job.
Size and port are the first choice: the 400 size with its 1/2 in NPT port suits lines that need more flow than 200/300 units, but confirm against your actual air demand before ordering. Drain type matters: this manual-drain version must be emptied by hand, which unlocks the wider 0.05-0.9 MPa (7-130 psi) setting range, while automatic and differential-pressure drains suit unattended installations but start from 0.15 MPa. Filter grade is the standard 40 um; specify code W for 5 um. The gauge here reads psi; MPa and bar scales are available, and G or PT threads can be ordered instead of NPT. Flow is published as curves, not a single rating, so 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 GFR400 as curves rather than a single rated figure, so we do not quote one number. Send us your line pressure and air demand and we will confirm the sizing from the datasheet on request.
The M in this code means the polycarbonate bowl is drained by hand rather than automatically. It also unlocks the wider 0.05-0.9 MPa (7-130 psi) setting range, since automatic and differential-pressure drain versions start at 0.15 MPa. Plan a routine drain so collected water is not carried downstream.
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.