The AirTAC GFR30008MLJC3T 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 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 GFR30008MLJC3T is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in one body, with a single 1/4 in NPT connection. This configuration is the low-pressure type (code L), fitted with a manual drain (M) for hands-on bowl drainage, the standard 40 um filter element, a round external gauge reading in bar (C3), and no mounting bracket (J). It filters water and particulate from compressed air and regulates downstream pressure in one compact unit. Maximum inlet pressure is 1.0 MPa (145 psi); operating temperature is -5 to 70 C, non-freezing. The polycarbonate bowl suits the 300 size frame.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and with choices of drain type, filter grade (40 um standard, 5 um optional), gauge style and scale, thread (PT standard; G and NPT as order options) and bracket. Flow is published as curves rather than a single rating, so we confirm flow and other datasheet figures on request.
| Model | GFR30008MLJC3T AirTAC Filter Regulator NPT1/4 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT 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, bar scale |
| Reflux valve | Not fitted |
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. |
| J | Supplied without bracket. |
| (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. |
| (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. |
| (blank) | No reverse-flow valve (the default). |
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 fixture-clamping manifold that holds workpieces at reduced pressure, this low-pressure filter regulator cleans the supply and holds the set pressure, with the bar gauge giving the operator a direct reading at the cell.
Feeding seal cylinders and diverters on a carton-sealing conveyor, the GFR300 strips water and 40 um particulate from the shop air and regulates the supply in one body, with the manual drain bled during shift checks.
On a lab bench drop feeding air-operated pumps and stirrers, this unit filters the compressed air and regulates it at low set pressures, with the round bar gauge letting technicians verify supply at a glance.
Choose the GFR300 size step when your line sits in the mid flow band and a 1/4 in port matches your piping; step up to 400 or 600 for larger demand, down to 200 for smaller circuits. This unit is the low-pressure type (L), intended where regulated pressure stays below the standard regulator band - the exact range is not published, so confirm your set pressure with us before ordering. The manual drain (M) suits installations where an operator can bleed the bowl on a routine; choose automatic or differential-pressure drain codes if unattended drainage is needed. The 40 um element is the standard grade; specify W for 5 um finer filtration. The round gauge here reads in bar; square embedded gauges and MPa/psi scales are also available. Thread is NPT on this code; PT is the catalogue standard and G (BSPP) is an order option. Bracket is omitted (J) - add a bracket code if you need panel fixing. Because flow is published as curves, not a single rating, 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. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR300 as curves, not as a single rated figure, so we do not quote a number here. Contact us and we will confirm the flow curve and check the sizing against your application before you order.
The M in the code specifies a manual drain: the bowl is bled by hand on a routine, which suits attended installations. The C3 code fits the external round gauge with a bar scale; an embedded square gauge with MPa or psi scale is available as an alternative. This code is also the low-pressure type (L), so confirm your set pressure with us - its exact range is not published.
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.