The AirTAC GFR400-15T AirTAC Filter Regulator NPT1/2 Low-Pressure 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 GFR400-15T is an AirTAC GFR-series filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This 400-size unit is ordered with a 1/2 in NPT thread, the 5 um element (code W) for finer filtration than the standard 40 um, a differential-pressure drain that bleeds collected condensate automatically as flow passes through, and a fitted round pressure gauge with an MPa scale. It is the low-pressure (L) type, and the polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, drain, filter-grade, gauge and thread options to match most compressed-air layouts. Flow figures are published as curves rather than a single rating, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR400-15T AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure 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 — round, MPa 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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)). |
| L | Low-pressure 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. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Mounted at the drop feeding a packaging hall's actuators and air cylinders, this filter regulator cleans the supply of water and debris and holds a steady low working pressure so the line runs consistently through the shift.
On a conveyor system with pneumatic diverters, stopper gates and pusher cylinders, this unit supplies filtered air at a controlled low pressure, with the round MPa gauge letting operators verify set pressure at a glance.
For laboratory rigs and pneumatic test benches that need clean, finely filtered air at a gentle regulated pressure, the 5 um element and low-pressure type make this unit a practical single-body supply point.
Choose GFR size by the port step and the flow your line needs: this 400 size carries a 1/2 in NPT thread for larger supply circuits. Pick the drain to suit maintenance access - differential-pressure (this unit) drains with flow, automatic drains on its own, manual needs an operator. Select the 5 um element (W) when finer filtration matters, otherwise the 40 um standard. Gauge scale is MPa here; psi and bar scales are available. Thread is NPT on this model; PT is the standard and G (BSPP) is an order option. A mounting bracket is included.
Flow is published as curves, not a single rated figure, so send us your application and we will confirm sizing against the datasheet before you order. The low-pressure type's exact regulation range is not published in the standard tables - confirm it with us.
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 GFR series as curves, not as a single rated number, so we do not quote a figure here. Tell us your application and we will confirm the flow from the datasheet and check the sizing against your line before you order.
The L code in GFR40015LC1WT selects the low-pressure regulator variant, intended where downstream equipment needs gentler working pressures than the standard type targets. Its exact regulation range is not published in the standard tables, so confirm it with us. Everything else here is standard decode: 1/2 in NPT thread, 5 um filtration, differential-pressure drain, round MPa gauge, bracket included.
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.