The AirTAC GFR300C10ALJF3WT AirTAC Filter Regulator NPT3/8 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 See datasheet ports, a differential-pressure 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 GFR300C10ALJF3WT is an AirTAC GFR300 filter regulator: one body that removes water and particulate from compressed air and holds a regulated downstream pressure. This configuration is the low-pressure type, built for circuits whose set pressure sits below what a standard regulator covers. It has a 3/8 in NPT port, a 5 um filter element (the finer of the two published grades), an automatic drain that ejects collected condensate without manual attention, an embedded square gauge reading in bar, and no mounting bracket. The bowl on this 300 size is polycarbonate; only the 600 size uses aluminium alloy. 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 GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and each size can be ordered with a different drain type, filter grade, gauge and scale, thread (PT standard, with G and NPT as options), bracket and reverse/check valve. AirTAC publishes flow for this family as curves rather than a single rated figure, so ask us to confirm the flow and datasheet figures for your application before ordering.
| Model | GFR300C10ALJF3WT AirTAC Filter Regulator NPT3/8 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Standard 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — factory standard, Factory standard 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. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). 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. |
|---|---|
| C1 | Port size See datasheet. This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C1 (two-unit set) |
Holds a gentle, steady regulated supply to the clamping cylinders of an assembly fixture, with the 5 um element keeping fine debris out of the clamp valves.
Feeds filtered, regulated low-pressure air to bench-top analytical or test instruments that are sensitive to water carryover and pressure drift.
Supplies filtered, regulated air to the low-pressure jets and actuators on a packaging machine, with the automatic drain clearing condensate during continuous runs.
Choose the size and port against the air demand of the circuit: this unit is size 300 with a 3/8 in NPT port, one step up from the 200/1/4 in tier and one below the 400/1/2 in tier. Because it carries the L code, it is the low-pressure regulator version; the exact adjustment range for the low-pressure type is not published, so confirm it with us. Drain is automatic here, with manual and differential-pressure drains as the other published choices. The filter grade is 5 um (code W); 40 um is the standard grade if coarser filtration is acceptable. The gauge is the embedded square type with a bar scale; MPa and psi scales and an external round gauge are available. Thread is NPT on this unit; PT is the standard and G is also an option, and no mounting bracket is fitted.
AirTAC publishes flow for this family as curves, not a single rating, so 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 GFR family as curves rather than a single rated figure, so we do not quote one number. Send us your air demand and line pressure and we will confirm the flow from the datasheet for this exact configuration.
The L code marks the low-pressure regulator version, intended for circuits whose set pressure sits below what the standard type covers. The exact adjustment range for the low-pressure type is not published, so confirm it with us before ordering. Everything else in the code - 3/8 in NPT port, 5 um element, automatic drain, square bar gauge - is unchanged.
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.