The AirTAC GFR400-15 AirTAC Filter Regulator G1/2 5um psi gauge 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 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 AirTAC GFR400-15 is a filter regulator: it removes water and particulate from compressed air and sets a stable downstream pressure in a single 1/2 in (G1/2) body. This configuration carries the 5 um element (code W) for finer filtration than the standard 40 um grade, a differential-pressure auto drain that bleeds collected condensate as flow demand changes, an embedded square gauge reading in psi, a built-in reverse/check valve that holds downstream pressure when the supply is lost, and a mounting bracket. Regulation range is 0.15-0.9 MPa (20-130 psi) with this drain type, and maximum inlet pressure is 1.0 MPa (145 psi).
This is a genuine AirTAC part from the GFR400 series, one of four sizes (200/300/400/600) with port options from 1/8 in to 1 in and PT, G (BSPP) or NPT threads. The polycarbonate bowl suits the non-freezing -5 to 70 C working range. Because AirTAC publishes flow as curves rather than a single rated figure, we confirm the flow and datasheet figures for your application on request.
| Model | GFR400-15 AirTAC Filter Regulator G1/2 5um psi gauge |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (G (BSPP) 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 | Differential-pressure 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 0.15 - 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". |
| (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). |
| F | Gauge shape: Square. 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 the clamping cylinders on a machining centre with 5 um filtered air held at a set clamping pressure, while the check valve keeps fixtures gripped if the shop supply drops.
Conditions the air feeding the cylinders and vacuum generators on a packaging conveyor line, with the psi gauge letting operators verify set pressure at a glance.
Supplies clean, regulated air to analyser cabinets and pneumatic sample-handling actuators, where the 5 um element protects sensitive valves from particles and carryover water.
Step up or down the G-series sizes (200/300/400/600) against the port and the flow your line needs; this 400 size takes a 1/2 in port. Choose the drain to match maintenance access: differential-pressure (this unit, best where demand varies), fully automatic, or manual for supervised drains. Pick the element grade: 40 um standard protection or 5 um (this unit, code W) for finer air. Select the gauge scale (MPa, psi or bar) and thread family - PT is the standard, with G (BSPP) and NPT as order options - and add or omit the bracket and check valve as the circuit requires. 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 this series as curves rather than a single rated figure, so we do not quote one number. Tell us your working pressure and air demand and we will confirm the flow and the full datasheet figures for the GFR400-15 on request before you order.
The code W in GFR40015F2WGK selects the optional 5 um filtration grade; 40 um is the standard element. Choose 5 um where downstream valves, actuators or instruments need finer protection, and pair it with the differential-pressure drain, which is the drain type fitted on this configuration.
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.