The AirTAC AirTAC GFR30010LF2GK Filter Regulator 3/8 in G-Thread 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 PT3/8" 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 GFR300 series combines water and particulate filtration with pressure regulation in a single body. This unit is built for 3/8 in G (BSPP) ports, carries the standard 40 um filter element, and drains condensate by differential pressure, so the bowl empties as the pressure drop across the element grows - no daily manual draining. It is the low-pressure regulator type, and it comes with an embedded square gauge scaled in psi, a reverse/check valve fitted, and a mounting bracket included. The polycarbonate bowl lets you see condensate building up at a glance.
This is a genuine AirTAC part. The G-series filter regulator range spans sizes 200 to 600 with ports from 1/8 to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um standard or 5 um (W) filtration, gauge scales in MPa, psi or bar, and PT, G or NPT thread options. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | AirTAC GFR30010LF2GK Filter Regulator 3/8 in G-Thread |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (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. |
|---|---|
| 10 | Port size PT3/8". 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 · PT3/8" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Feeding clean, regulated air to the clamp and eject cylinders on a carton-forming line, where the low-pressure regulator type holds a gentle set pressure and the 40 um element keeps scale and pipe rust out of the valve stack.
Conditioning supply air ahead of low-pressure spray and atomizing circuits in a finishing booth, where the check valve holds the downstream setting if supply pressure dips and the differential-pressure drain keeps the bowl clear between shifts.
Mounted on the service panel of a robotic welding or handling cell, delivering filtered, regulated air to grippers and air tools, with the psi-scaled square gauge giving operators a local pressure readout at the cell.
Size 300 with 3/8 in G ports sits in the middle of the GFR range: step up to 400 or 600 when the circuit needs larger ports and more flow, or down to 200 for compact lines. Because flow is published as curves and not a single rating, ask us to check the curve against your air demand before you fix the size. This configuration is the low-pressure regulator type - confirm the set pressure you need and we will verify the exact adjustment range from the datasheet. The 40 um element is the standard grade for general plant air; choose the W code only where finer filtration is required. Drain is differential-pressure as coded; automatic (A) and manual (M) drains are available in the family if your maintenance routine suits them better. The square gauge here reads in psi; MPa and bar scales are alternatives, and an external round gauge is optional. Thread is G (BSPP) as ordered - PT is the catalogue standard and NPT is also available. A bracket is included; J-coded versions omit it.
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 this series as curves, not as a single rated figure, so we do not quote a number here. Tell us your working pressure and air demand and we will confirm the sizing from the datasheet curve before you order.
K means a reverse (check) valve is fitted, so downstream pressure is held if the upstream supply drops. This unit also uses the differential-pressure drain: condensate is discharged automatically as the pressure drop across the 40 um element builds, with no manual draining required.
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.