The AirTAC GFR30010MLJC1WT AirTAC Filter Regulator NPT3/8 Low-Pressure is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT3/8" 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 GFR30010MLJC1WT is a 300-size filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built for low-pressure circuits, with a 5 um filtration element (the finer of the two catalogue grades), a manual drain bowl in polycarbonate, a round pressure gauge scaled in MPa, and an NPT3/8 port. No mounting bracket is included and no reverse/check valve is fitted.
This is a genuine AirTAC part from the GFR series, which spans sizes 200 to 600 with port sizes from 1/8 in to 1 in. Choices across the series include manual, automatic or differential-pressure drains, 40 um or 5 um filtration, square or round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Because flow is published as curves rather than a single rating, we confirm the datasheet and sizing figures on request.
| Model | GFR30010MLJC1WT AirTAC Filter Regulator NPT3/8 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 5 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, 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. |
|---|---|
| 10 | Port size PT3/8". 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. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
A CNC machining cell that clamps workpieces with air actuators running at reduced pressure gets filtration and low-pressure regulation in one body, with the 5 um element protecting the clamp valves from particulate and the MPa gauge showing setpoint at a glance.
Positioners and pilot-operated process valves in a plant air loop need clean, steady, low-pressure air; this filter regulator conditions the pilot supply, and the manual drain suits a sheltered, regularly visited installation point.
A packaging line section that runs actuators at reduced pressure takes conditioned air from this unit: water and 5 um-grade particulate are stripped out, pressure is regulated for that circuit only, and the NPT3/8 port matches the machine's supply plumbing.
Size 300 with a 3/8 in NPT port suits lines whose air demand sits in the mid-range of the GFR family; step up to size 400 or 600 for higher flow, or down to size 200 for compact circuits - we will check the flow curve against your application before you order. This unit is the low-pressure type, so specify it where the regulated setpoint is well below standard circuits; the exact adjustment range for the low-pressure version is not published and we confirm it on request. The 5 um element (code W) is the finer grade, chosen where downstream valves and cylinders need cleaner air than the 40 um standard. The manual drain means an operator opens the bowl drain periodically - choose automatic drain variants if the unit is mounted in an awkward spot or the line runs unattended. The round gauge here reads in MPa; psi and bar scales are alternatives, and an embedded square gauge is the standard option. NPT is an order option alongside the PT standard and G thread, and brackets are optional on this configuration.
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 GFR series as curves, not as a single rated figure, so we do not quote a number here. Send us your application's air demand and line pressure and we will confirm the correct size against the datasheet curves before you order - that confirmation is available on request.
The M in this model code specifies a manual drain: condensate collected in the polycarbonate bowl is released by opening the drain by hand during routine checks. Choose manual where the unit is easy to reach and serviced regularly; choose the automatic or differential-pressure drain variants where the unit is mounted in a confined position or the line runs unattended for long periods.
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.