The AirTAC GFR30010MLJC2WK AirTAC Filter Regulator PT3/8, 5 um 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.
GFR30010MLJC2WK is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in one body for compressed air. It removes water and particulate through a 5 um element (code W) and regulates downstream pressure with the low-pressure regulator type. This configuration carries a PT3/8 port, a manual drain on the polycarbonate bowl, a round gauge reading in psi, a built-in reverse/check valve (code K) and no mounting bracket (code J). Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR300 sits in the GFR size range of 200, 300, 400 and 600, with port sizes, drain types, filter grades, gauge styles and scales, thread options and bracket choices available across the family. Flow figures for this series are published as curves rather than a single rated number, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR30010MLJC2WK AirTAC Filter Regulator PT3/8, 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (PT 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, 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". |
| 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. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
On a carton-sealing or case-packing machine, the clamping and hold-down cylinders often need a lower, tightly held supply pressure than the main plant air line. This filter regulator cleans the incoming air to 5 um, drops it to the low pressure the clamp circuit needs, and the reverse/check valve helps hold the set pressure if the upstream supply dips.
Spray and coating applications are sensitive to dirty air and to pressure drift: a clogged cap or a creeping regulator shows up directly in the finish. Feeding the atomizing circuit through this unit filters water and particulate down to 5 um and regulates at the reduced pressure the gun or coating head calls for, with the psi round gauge giving the operator a direct reading.
Bench-top rigs and pilot setups frequently run sensitive pneumatic components at reduced pressures well below normal line level. This low-pressure type filter regulator conditions the shop air supply to the bench, removes fine contamination ahead of the test article, and the manual drain suits a bench where an operator bleeds the bowl between runs.
Choose the size and port step against the air demand of your circuit: GFR300 with its PT3/8 port is the mid-size step in the 200/300/400/600 range, and larger sizes carry larger ports and more flow capacity. For the drain, pick manual (this model) where an operator can bleed the bowl periodically, automatic for hands-off condensate removal, or the differential-pressure default; note the manual-drain variant also widens the standard regulator adjust window. Filter grade is 40 um standard or 5 um (code W) as fitted here for finer particulate protection. Gauge choice is embedded square as standard or an external round gauge, with MPa, psi or bar scales - this unit carries the round gauge in psi. Thread is PT as standard with G (BSPP) and NPT as order options, and the bracket can be included or omitted (J = no bracket, as here). Because flow for this series is published as curves rather than a single rating, send us your application details and we will confirm sizing against 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.
AirTAC publishes flow for the GFR series as curves rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number for this unit. Send us your application - port size, upstream pressure and the flow your circuit needs - and we will confirm the relevant datasheet curve figures on request before you order.
The M in the model code specifies a manual drain: condensate collected in the polycarbonate bowl is released by hand, which suits installations an operator visits regularly. The GFR300 family is also available with an automatic drain (code A) or the differential-pressure drain (blank code) as the default; on the manual-drain variant the regulator adjust window is wider than on the auto and differential-pressure versions. Tell us which drain behaviour your site needs and we will confirm the matching code.
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.