The AirTAC GFR30008ALJC1T AirTAC Filter Regulator, NPT1/4, Auto Drain 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 automatic 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 GFR30008ALJC1T is an AirTAC GFR300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has 1/4 in NPT ports, an automatic drain that expels collected condensate without manual attention, a 40 um standard filter element, and a fitted round pressure gauge with MPa scale. The regulator is the low-pressure type (code L) for circuits set below standard ranges. The polycarbonate bowl suits non-freezing compressed air from -5 to 70 C, maximum inlet pressure is 1.0 MPa (145 psi), and no mounting bracket is included (code J).
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, PT, G or NPT threads, manual, automatic or differential-pressure drains, 40 um or 5 um (W) filtration, gauge choices and bracket options. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR30008ALJC1T AirTAC Filter Regulator, NPT1/4, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, MPa 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". |
| A | Drain: Automatic 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 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 spray-painting line, the unit strips water and pipe scale from the supply before the gun and holds the atomizing air at the low, stable pressure the booth recipe calls for, with the automatic drain keeping the bowl clear between shifts.
In a CNC fixture clamp circuit, delicate workpieces need a lower clamp pressure than the main shop air. The low-pressure regulator type sets that gentler level while the 40 um element stops particles reaching the clamp cylinders.
On a packaging line's carton-closing section, the unit feeds the flap-fold and taping cylinders with cleaned, regulated air at reduced pressure, and the MPa round gauge lets an operator verify the setting at a glance.
Size 300 with 1/4 in NPT ports is the mid-range step in the GFR line: step down to size 200 for compact circuits or up to 400/600 when demand outgrows the port. Because flow is published as curves rather than a single rating, send us your application details and we will confirm sizing before you order. The choices that matter on this unit: drain type (this one is automatic; manual and differential-pressure are catalogue alternatives), filter grade (40 um standard here, 5 um with code W for finer protection), gauge type and scale (this model carries a round MPa gauge; embedded square gauges and psi or bar scales are options), thread (PT is the standard; G and NPT are order options), and bracket (code J means no bracket is fitted). The low-pressure regulator type (L) is built for lower setpoints; its exact adjustment range is not published, so confirm your setpoint with us.
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 rather than a single rated figure, so there is no one number we can honestly quote. Send us your flow demand and operating pressure and we will confirm from the datasheet whether this 1/4 in unit is correctly sized for your application before you order.
The A code fits an automatic drain that expels collected condensate without anyone opening the bowl, which suits lines that run unattended. Manual (M) and differential-pressure (blank) drains are catalogue options on the same GFR300 unit if you prefer a different arrangement.
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.