The AirTAC GFR30008LF2GK AirTAC Filter Regulator G1/4 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 PT1/4" 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 GFR30008LF2GK is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in one body. This configuration is built with G1/4 (1/4 in) ports, the low-pressure regulator type, a 40 um standard filter element and a differential-pressure drain, so condensate is discharged without a daily manual draining routine. The 300 size uses a polycarbonate bowl, an embedded square gauge reading in psi is fitted, and the built-in reverse/check valve holds the downstream side when the supply pressure drops. A mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600, with ports from 1/8 to 1 in, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um (code W) filtration, square or round gauges scaled in MPa, psi or bar, and PT, G or NPT threads. Maximum working pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR30008LF2GK AirTAC Filter Regulator G1/4 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (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 | 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. 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.
| GFR300 | G-series filter regulator, 300 body — sets the port range. |
|---|---|
| 08 | Port size PT1/4". This body offers 08 = PT1/4", 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. |
| 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 | GFR300 · PT1/4" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
On a machining fixture, pneumatic clamps are held at a reduced regulated pressure below the main shop supply. This filter regulator cleans the supply, regulates the clamp circuit, and the fitted check valve holds the downstream side if the main supply dips mid-cycle.
A case packer or carton-sealing station on a packaging conveyor needs clean, dry air at a stable set pressure for its cylinders. This unit filters water and particulate at the drop, regulates the station pressure, and the differential-pressure drain keeps condensate off the actuators.
Gripper and vacuum-generator circuits on an assembly robot are sensitive to pressure drift and dirty air. Feeding the cell through this G1/4 filter regulator gives the gripper loop filtered air at a set point, with the psi gauge giving the operator a visible reference.
Pick the size by the port and flow your line needs: sizes 200 to 600 step up from 1/8 to 1 in, and this 300 unit sits at 1/4 in with G threads (PT is the standard thread; G and NPT are order options). Drain type is a real choice: differential-pressure (this unit), automatic (code A) or manual (code M). Filter grade is 40 um standard or 5 um with code W for finer particulate. Gauges are an embedded square gauge or an optional external round gauge, scaled in MPa, psi or bar - this unit reads psi. A bracket is included unless code J removes it. The L in this code marks the low-pressure regulator type; its exact adjustment range is not published, so confirm it with us. Flow is published as curves, not a single rated figure, so ask us to check 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 GFR300 flow as performance curves rather than a single rated figure, so we do not quote a number here. Send us your line pressure, port size and air demand, and we will confirm the datasheet curve for your application before you order.
F is the gauge code and 2 is the psi scale, so this unit comes with an embedded square gauge reading in psi; an external round gauge and MPa or bar scales are available as options. K means a reverse/check valve is fitted, which holds downstream pressure if the supply drops.
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.