The AirTAC GFR30008MLJC3TK 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 AirTAC GFR30008MLJC3TK is a GFR300 filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This configuration is the 300 size with a 1/4 in NPT port, a polycarbonate bowl with manual drain, the standard 40 um filter element, and the low-pressure regulator type. A round pressure gauge reading in bar is fitted, and a reverse/check valve is included on this unit.
This is a genuine AirTAC part. The GFR family spans the 200, 300, 400 and 600 sizes with ports from 1/8 in to 1 in, a choice of manual, automatic or differential-pressure draining, 40 um or 5 um filtration, and gauge styles and pressure scales to order. Flow for this size is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR30008MLJC3TK 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 | 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. |
| 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. |
| 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, low-pressure regulated air to the clamping cylinders on a packaging line, with the manual drain emptied at the start of each shift to keep collected water out of the actuators.
Conditions the shop air feeding finish guns in a furniture spray booth: particulate and water are stripped before the gun, and the low-pressure regulator holds a gentle, repeatable setpoint for finishing work.
Supplies cleaned and regulated air to the small pneumatic actuators on a filling and capping machine, with the check valve helping hold the downstream setting if supply pressure dips.
Every choice on this code is decodable: the 300 size with its 1/4 in NPT port sets the connection and the flow band you should size against; the manual drain means an operator opens the bowl drain rather than relying on an automatic or differential-pressure mechanism; the 40 um element is the standard grade (5 um is available as code W); and the round gauge reads in bar. This is the low-pressure regulator type, so confirm its adjustment range against your setpoint before ordering - the exact range is not published on our sheet. Thread here is NPT; PT is the standard and G (BSPP) is available to order, and this configuration omits the mounting bracket. Because flow is published as curves rather than a single rating, send us your flow and pressure requirements and we will confirm sizing from the datasheet before you order.
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.
Flow for the GFR300 size is published as curves, not as a single rated figure, so we do not quote a number here. Send us your required flow and working pressures and we will confirm from the AirTAC datasheet whether this 300 size with a 1/4 in NPT port suits your application.
This code carries M, the manual drain: an operator opens the bowl drain to release collected water. If you prefer unattended draining, the same GFR300 body is available with an automatic drain (code A) or the differential-pressure drain that is the family default - ask us to quote the variant.
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.