The AirTAC GFR400-15G AirTAC Filter Regulator 1/2 in G, 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 GFR400-15G is a size 400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration has a G1/2 (BSPP) port, a manual drain bowl in polycarbonate, a standard 40 um filter element, an embedded square gauge reading in psi, a fitted reverse/check valve, and a mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). With manual drain, the regulation range is 0.05-0.9 MPa (7-130 psi).
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with a choice of ports, thread options (PT standard, G and NPT to order), drain types, 40 um or 5 um filtration, gauge scales and check-valve variants. Flow figures are published as curves rather than a single rating, so ask us to confirm the datasheet for your application.
| Model | GFR400-15G AirTAC Filter Regulator 1/2 in G, Manual Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (G (BSPP) 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 — square, 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). |
| F | Gauge shape: Square. 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. |
| 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Point-of-use conditioning on a packaging line: the 40 um element strips water and pipe scale before the regulator sets a stable working pressure to the machine's valves and cylinders.
Feeding pneumatic cylinders and grippers on a conveyor system, where the regulator holds the set pressure for consistent clamping and the check valve holds the downstream circuit on supply loss.
A service bench or workshop air drop where technicians set pressure per job on the psi gauge and drain the bowl manually at the end of each shift.
Size and port step up with flow demand: 200, 300, 400 and 600 with ports from 1/8 in to 1 in, so pick the size whose published flow curve covers your consumption with margin. This unit is 1/2 in G thread; PT is the standard thread and G or NPT are order options. Drain choice matters: manual drain (this unit) needs periodic bowl draining, while automatic or differential-pressure drain suits unattended installations. Filter grade is 40 um standard; specify 5 um (code W) where finer protection is needed. Gauge scale can be MPa, psi or bar - this one reads psi.
Flow is published as curves, not a single rated figure, so send us your line pressure, downstream demand and duty before ordering and we will confirm sizing against the datasheet.
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 series as curves, not as a single rated number, so we do not quote a figure here. Send us your inlet pressure, downstream demand and duty cycle and we will confirm the flow curve and sizing from the datasheet on request.
Manual drain means an operator opens the bowl drain periodically to release collected condensate - simple and reliable for attended installations. It also widens the regulation range to 0.05-0.9 MPa (7-130 psi), versus 0.15-0.9 MPa (20-130 psi) on the automatic and differential-pressure drain versions. If the unit is mounted where draining is awkward, ask us about the automatic or differential-pressure drain variants.
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.