The AirTAC GFR40015LF2G AirTAC Filter Regulator G1/2 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 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 GFR40015LF2G is an AirTAC GFR400 filter regulator: a water-and-particulate filter and a pressure regulator built into one body, so a single 1/2 in (G1/2) connection handles both jobs. This unit is the low-pressure type (code L) with a 40 um standard filter element, the differential-pressure drain (the standard drain option), an embedded square gauge reading in psi, a polycarbonate bowl and the mounting bracket included. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. The low-pressure type has its own regulation range, which the catalogue does not publish as a single figure - we confirm it on request.
This is a genuine AirTAC part. The GFR family is offered in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and this size 400 unit takes G1/2 (G thread, BSPP); PT is the AirTAC standard thread and G or NPT are ordered as options. Other decodable choices include a 5 um element (code W), automatic or manual drain instead of differential-pressure, gauge scales in MPa, psi or bar, and an external round gauge. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and any datasheet figure against your application before ordering.
| Model | GFR40015LF2G AirTAC Filter Regulator G1/2 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (G (BSPP) thread) |
| Filtering grade | 40 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 — 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". |
| (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). |
| 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. |
| (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) |
Mounted at the drop feeding a clamping fixture or pneumatic press that is specified to run below standard line pressure, the low-pressure regulator holds the reduced setting while the 40 um element keeps rust and pipe scale out of the valve stack.
At the 1/2 in main feeding a packaging or textile machine's actuator bank, the GFR400 cleans the supply and sets a stable reduced pressure, with the psi gauge giving operators a local reading at the machine.
On a test rig or process skid where instruments and actuators need a gentle, regulated supply, the filter and regulator in one body saves a panel connection, and the differential-pressure drain handles condensate between services.
Choose the size by port and flow: size 400 with a 1/2 in G1/2 port suits lines plumbed at 1/2 in, and larger sizes carry more flow - we check the published flow curves against your demand on request. Pick the drain: differential-pressure (this unit, the default), automatic (A) for unattended condensate removal, or manual (M) for periodic draining. Pick the element: 40 um standard here, 5 um with code W where finer filtration is needed. The embedded square gauge on this unit reads psi; MPa and bar scales and an external round gauge are options. Thread: PT is the AirTAC standard; G (this unit) and NPT are ordered as specification options. Brackets are included unless code J is specified. Because flow is published as curves, not a single rating, ask us to confirm sizing against the application before ordering.
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 GFR400 as curves, not as a single rated figure, so we do not quote a number here. Tell us your line pressure, set pressure and air demand and we will confirm the flow from the datasheet on request before you order.
L marks the low-pressure regulator type, intended where the reduced pressure is well below the standard range. Its exact regulation range is not published in the catalogue as a single figure, so we confirm it on request. The rest of the code decodes as: size 400 with G1/2 port, G thread, differential-pressure drain, 40 um element, square psi 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.