The AirTAC GFR30008MLC3WTK AirTAC Filter Regulator NPT1/4 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 PT1/4" 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 AirTAC GFR30008MLC3WTK is a size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built for 1/4 in NPT ports, carries the fine 5 um filter element (code W), drains collected condensate by hand via the manual drain, and is the low-pressure regulator type (code L) for circuits that must not see high set pressures. It is fitted with a round pressure gauge reading in bar (code C3), a reverse/check valve (code K) to hold downstream pressure when the supply is lost, and includes a mounting bracket.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in and thread options PT, G and NPT. Filter grade, drain type, gauge style and scale, and regulator type are all selectable. Flow figures are published as curves rather than a single rating, so we confirm the datasheet and sizing figures on request.
| Model | GFR30008MLC3WTK AirTAC Filter Regulator NPT1/4 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 5 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 — round, 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". |
| 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). |
| C | Gauge shape: Round. C is round, F is square. |
| 3 | Gauge scale: bar. 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. |
| 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Feeds filtered, regulated air to end-of-arm grippers on a robotic assembly cell, with the check valve holding the gripper position if shop air is interrupted.
Conditions the air feeding bench-top pneumatic test rigs and calibration fixtures, where the fine 5 um element and low-pressure regulator protect sensitive instruments.
Supplies clean, regulated air to the small cylinders and air-jet nozzles that divert cartons on a packaging conveyor, with the bar gauge giving operators a visible line-pressure reference.
Size and port step up together across the GFR range (200 to 600, 1/8 in to 1 in), so pick the size whose flow curve covers your demand at an acceptable pressure drop - ask us to check the curve against your application before ordering. This unit is already fixed at size 300 with 1/4 in NPT ports (T code; PT is the standard thread and G is also available to order). Drain choice matters: manual (this unit) means an operator drains the bowl, while automatic and differential-pressure drains discharge condensate without attention. The 5 um element (W) suits finer air-quality needs; 40 um is the standard grade. The round bar gauge is fitted here; embedded square gauges and MPa/psi scales are the other options. A mounting bracket is included.
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 G-series flow as performance curves rather than a single rated figure, so we do not quote a l/min, SCFM or Cv number. Send us your application details and we will confirm the flow and sizing figures from the datasheet on request.
The M in the code selects the manual drain: an operator drains the bowl by hand, which suits installations checked as part of a routine, while automatic or differential-pressure drains are chosen where unattended condensate removal is needed. The L selects the low-pressure regulator type, intended for circuits that operate at reduced set pressures; its exact adjustment range is not published in the catalogue, so we confirm it on request.
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.