The AirTAC GFR30008MLC2GK 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 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 GFR30008MLC2GK is a size-300 GFR filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration is the low-pressure type, fitted with a manual drain on the 40 um filter bowl, a reverse/check valve, an external round gauge reading in psi, and a mounting bracket. The port is G1/4 (BSPP); the bowl on this size is polycarbonate (PC).
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, a choice of manual, automatic or differential-pressure drains, a 5 um element option (code W), square or round gauges with MPa, psi or bar scales, and G or NPT thread options. Flow is published as curves rather than a single rating, so ask us to confirm the figures against your application before ordering.
| Model | GFR30008MLC2GK AirTAC Filter Regulator G1/4, Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (G (BSPP) thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 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, 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". |
| 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. |
| 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) |
Feeds clean, low-pressure air to bench-top test rigs and lab actuators where the circuit runs below standard plant pressure; the 40 um element keeps water and pipe scale out of sensitive instruments and the psi gauge gives a direct local reading.
Supplies filtered, regulated air to pneumatic clamps and soft-jaw fixtures that must not be slammed at full line pressure; the low-pressure type regulator holds a gentle set-point and the reverse/check valve holds the circuit if supply is interrupted.
Prepares the pilot line feeding diaphragm-actuated process valves on a skid: the filter bowl drops out condensate and particulate before the positioner, the regulator sets the pilot pressure, and the manual drain lets an operator bleed the bowl during rounds.
Step through the real choices before you order: pick the size (200/300/400/600) and its port against the flow your line needs; choose the drain - manual (this model, simplest service, lowest regulator set-point floor), automatic, or the differential-pressure default; choose the 40 um standard element or the 5 um W option; pick the gauge style and scale (this unit carries an external round gauge in psi); and confirm the thread - PT is the standard, with G (BSPP, this model) and NPT as order options. The low-pressure type (L) is the right pick where the circuit works well below standard line pressures; its exact adjustment range is not published, so confirm it with us.
One honest note on sizing: AirTAC publishes flow for this family as curves, not as a single rated figure. Send us your required flow and line conditions and we will confirm the curve data from the datasheet before you commit.
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 does not publish a single rated flow number for this unit - flow is given only as curves in the catalogue. We do not want to quote you a figure the datasheet does not state. Tell us your required flow and inlet pressure and we will confirm the curve data from the datasheet on request before you order.
The M in the code means the filter bowl is drained by hand: an operator opens the drain when condensate collects. It is the simplest arrangement and suits stations visited during normal maintenance rounds. If the unit sits in an inaccessible spot or runs unattended, the automatic-drain or differential-pressure-drain versions of the same GFR300 filter regulator are the better choice - both are available in this size.
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.