The AirTAC GFR40015MLF2T AirTAC Filter Regulator NPT1/2 Low-Pressure 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 GFR40015MLF2T is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This size 400 unit is fitted with 1/2 in NPT ports, a manual drain bowl in polycarbonate, a 40 um standard filter element, and an embedded square gauge reading in psi. It is the low-pressure regulator type, intended for circuits that work below standard regulated pressures; the exact adjustment range for the low-pressure type is not published, so confirm it with us against your setpoint before ordering. Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, a choice of manual, automatic or differential-pressure drains, a 5 um element option, gauges in MPa, psi or bar scales, and G (BSPP) or NPT thread options alongside the PT standard. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet and sizing for your application.
| Model | GFR40015MLF2T AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, psi 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| L | Low-pressure 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. |
| 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Fixture clamps and swing cylinders that must close gently at reduced pressure get clean, regulated air from one compact unit mounted at the fixture drop, with the square psi gauge giving the operator a direct pressure readout.
On a cartoning or wrapping line, a single filter regulator at the machine's air inlet strips water and pipe scale from the shop supply and holds a steady, lower-than-line pressure to the sealers and actuators, with the manual drain emptied during changeover.
Bench-mounted test rigs and pilot-plant skids use the low-pressure regulator type to feed instruments and small cylinders at reduced pressures, with the 40 um element protecting sensitive valves and the psi gauge supporting repeatable setups.
Start with the port step: this unit is size 400 with 1/2 in NPT ports; step up or down a size if your line runs larger or smaller piping, since flow capacity rises with size. Because flow is published as curves, not a single rated figure, ask us to confirm sizing against your application before ordering. Choose the drain to suit access: this configuration has a manual drain, which you operate by hand; automatic and differential-pressure drains are available if the unit will sit where manual draining is impractical. The 40 um element is standard; specify the W option for a 5 um grade where finer filtration is needed. The embedded square gauge here reads in psi; MPa and bar scales and an external round gauge are options. Thread is NPT on this unit (PT is the standard; G/BSPP is also a catalogue option), and a mounting bracket is included.
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 this series as curves, not as a single rated figure, so we do not quote a number. Tell us your application and we will confirm the flow from the datasheet and check the sizing against your line before you order.
The M in the code selects a manual drain: condensate collects in the polycarbonate bowl and you drain it by hand, which suits accessible mounting points on a regular maintenance round. This is also the low-pressure regulator type; its exact adjustment range is not published, so confirm the range against your setpoint with us before ordering.
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.