The AirTAC AirTAC GFR400-15 Filter Regulator G1/2, 5 um, Manual Drain is a genuine G-series filter regulator: water separation, 5 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 GFR400-15MC2WGK is a filter regulator: it removes water and particulate from compressed air and sets downstream pressure in a single body, so one 1/2 in ported unit does both jobs in the air-preparation position. This configuration carries a 5 um filtration element (the finer of the two catalogue grades), a manual drain on the bowl that you open by hand to dump collected condensate, a round external pressure gauge reading in psi, and a built-in reverse/check valve that holds the downstream setting when upstream supply is interrupted. The bowl on this size 400 unit is polycarbonate (PC). Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator adjustment range with a manual drain is 0.05-0.9 MPa (7-130 psi), and the working temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family is published in four sizes (200, 300, 400, 600) with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um standard or 5 um (W) filtration, embedded square or external round gauges with MPa, psi or bar scales, and PT, G or NPT threads. We do not quote a single rated flow figure because the catalogue publishes flow as curves only - ask us and we will confirm the datasheet figures for your application.
| Model | AirTAC GFR400-15 Filter Regulator G1/2, 5 um, Manual Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (G (BSPP) thread) |
| Filtering grade | 5 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 | Fitted (reverse flow permitted) |
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. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| G | G (BSPP) thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Feeds filtered, pressure-set air to the tool-change cylinders and clamping fixtures on a machining centre, with the 5 um element protecting the directional valves from particulate carryover and the check valve holding the clamp setting during a supply dip.
Sits at the air-preparation position on a carton-forming or wrapping line, delivering clean, regulated air at a set pressure to the sealing and folding cylinders, with manual drain suited to a line that is attended every shift.
Regulates and filters the air feeding pneumatic stoppers, divertors and lifters along a conveyor system, where the 1/2 in port matches the main drop feeding several stations and the psi gauge lets technicians verify set pressure at a glance.
Start with size and port: the 400 size with 1/2 in ports suits lines with higher air demand than the 200/300 sizes; match the port step to your piping and the flow your actuators actually draw. Then pick the drain: manual (this unit) means an operator opens the bowl drain periodically - simple and reliable where someone walks the line; automatic or differential-pressure drain suits unattended installations. Choose the 5 um element (this unit) over the 40 um standard when downstream valves, cylinders or instruments need finer air; note the finer element loads faster and needs more frequent draining. Gauge scale (this unit: round, psi) and thread (this unit: G/BSPP; PT is the catalogue standard, G and NPT are order options) are the remaining decodable choices, and a mounting bracket is included.
One honest note on sizing: AirTAC publishes flow for this family as curves, not as a single rated number, so we cannot honestly quote an l/min or SCFM figure here. Send us your application details and we will confirm the datasheet flow figures against your requirement before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR family as performance curves, not as a single rated figure, so we do not quote an l/min, m3/h or SCFM number on the page - and we will not estimate one. Send us your line pressure, downstream demand and application details, and we will confirm the exact datasheet flow figures for this 1/2 in, size 400 unit against your requirement before you order.
The M in the code specifies a manual drain: condensate collected in the polycarbonate bowl is released by opening the drain by hand. Choose manual where the installation is attended and someone can walk the line on a schedule; choose the automatic or differential-pressure drain option (available in the same size) where the unit sits in an unattended position and collected water must be expelled without operator action. Manual drain also widens the standard regulator adjustment range to 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.