The AirTAC GFR400-15 AirTAC Filter Regulator PT1/2, 5 um, Auto 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 automatic 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 AirTAC GFR400-15 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 400-size unit is configured with a PT1/2 (1/2 in) PT-thread port, a 5 um filter element (the finer of the two available grades), an automatic drain that expels collected condensate without manual attention, a round external gauge reading in psi, and a built-in reverse/check valve that holds downstream pressure when the supply is lost. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulation range is 0.15-0.9 MPa (20-130 psi), and the operating temperature is -5 to 70 C (non-freezing). The polycarbonate bowl suits this size; only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR filter-regulator family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, gauge style and scale options, PT, G or NPT threads, and bracket or no-bracket mounting. Flow for this series is published as curves rather than a single rated figure, so we confirm the datasheet and flow figures for your application on request.
| Model | GFR400-15 AirTAC Filter Regulator PT1/2, 5 um, Auto Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (PT thread) |
| Filtering grade | 5 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 | Automatic 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 0.15 - 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. |
|---|---|
| 15 | Port size PT1/2". This body offers 10 = PT3/8", 15 = PT1/2". |
| A | Drain: Automatic 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. |
| J | Supplied without bracket. |
| (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. |
| (blank) | PT 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) |
Point-of-use conditioning ahead of a machining centre's pneumatic valves and air bearings: the 5 um element protects fine components from particulate and the regulator holds a steady set pressure for consistent clamping and tool-change actuation.
Feeding cylinders and diverters on a packaging conveyor, where the automatic drain keeps condensate out of the actuators between shifts and the check valve holds the circuit's set pressure if the compressor unloads or the supply drops.
A 1/2 in branch drop serving several assembly benches: the filter-regulator cleans and sets one working pressure for the whole station, with the psi gauge giving operators a local, readable reference at the point of use.
Size and port: 400 is the larger step in the GFR range, and the 15 code gives a PT1/2 (1/2 in) port - step up or down in size to match the flow your line needs, since larger sizes carry larger ports and more flow capacity. Drain: automatic (code A) suits unattended duty; manual drain is the low-cost choice where an operator walks the line, and differential-pressure drain is the catalogue default. Filter grade: this unit carries the 5 um element (code W) for finer particulate removal; 40 um is the standard grade for general protection. Gauge: the round external gauge here reads in psi; embedded square gauges and MPa/bar scales are the other catalogue options. Thread: PT is the standard; G (BSPP) and NPT are order options - specify the thread your pipework needs. Bracket: this configuration omits the mounting bracket; order the bracket variant if panel or wall fixing is required. 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. 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 figure, so we do not quote a number. Send us your application details and we will confirm the datasheet and the flow curve so you can size the unit against your demand before ordering.
The A code fits an automatic drain, which discharges collected condensate from the polycarbonate bowl on its own - useful for units mounted in infrequently visited positions. The alternatives in the family are the catalogue-default differential-pressure drain and a manual drain; all three share the same 0.15-0.9 MPa regulation range on this filter regulator.
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.