The AirTAC GFR30008LF3TK AirTAC Filter Regulator NPT1/4 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 AirTAC GFR30008LF3TK is a GFR300-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is the 300 size with a 1/4 in NPT port, built as the low-pressure type for circuits that run below standard line pressures. It carries the standard 40 um filter element, a differential-pressure drain that bleeds condensate automatically as flow passes through, an embedded square gauge reading in bar, a reverse/check valve to hold downstream pressure when the supply drops, and a mounting bracket for panel or surface fixing.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, a choice of drain type, 40 um or 5 um filtration, gauge scale and thread form (PT standard, with G and NPT as order options). Flow is published as curves rather than a single rating, so ask us to confirm the figures for your application on request.
| Model | GFR30008LF3TK AirTAC Filter Regulator NPT1/4 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT 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, bar 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. |
| 3 | Gauge scale: bar. 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. |
| 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) |
Feeds filtered, regulated air to clamp cylinders on a CNC fixture circuit, with the check valve holding clamp pressure if the main supply dips mid-cycle.
Conditions the supply to carton-sealing and wrapping heads on a packaging line, keeping water and debris out of the valve bank while holding a steady low set pressure.
Supplies air to diaphragm actuators and low-pressure control devices on a process skid, where the low-pressure type regulator suits circuits set well below standard line pressure.
Size and port step up together: 200, 300, 400 and 600 serve progressively larger flows, so match the 300 size and its 1/4 in NPT port to the air demand of the circuit rather than to the component thread alone. Drain choice matters: the differential-pressure drain on this unit needs no operator attention, while automatic and manual drains are available as alternatives. Filtration is 40 um standard; specify 5 um (code W) where downstream valves or instruments need finer protection. The embedded square gauge reads in bar here, with MPa and psi scales and an external round gauge as options. Thread is NPT on this unit; PT is the catalogue standard and G is also orderable. Brackets can be omitted (code J) where panel fitting is not needed.
Because flow is published only as curves and not as a single rated figure, 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 the GFR300 series as curves, not as a single rated number, so we do not quote a figure that is not in the datasheet. Contact us with your air demand and line conditions and we will confirm the flow figures and correct sizing from the datasheet on request.
The L in GFR30008LF3TK marks the low-pressure regulator type, intended for circuits set below the standard regulator range. The exact adjustment range for this variant is not published in the material we hold, so ask us to confirm it on request 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.