The AirTAC GFR300C08MLJF3T AirTAC Filter Regulator NPT1/4 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 GFR300C08MLJF3T is an AirTAC GFR300 filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This configuration is the low-pressure regulator type, sized for a 1/4 in NPT port, with the standard 40 um filter element, a metal bowl drained manually, and a square pressure gauge scaled in bar. No mounting bracket is included. 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 in to 1 in, PT, G (BSPP) or NPT threads, manual, automatic or differential-pressure drains, 40 um or 5 um (W) filtration, gauge and bracket options, and a reverse/check valve option. Flow is published as curves rather than a single rated figure, so ask us to confirm datasheet figures for your application on request.
| Model | GFR300C08MLJF3T AirTAC Filter Regulator NPT1/4 |
|---|---|
| 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. |
|---|---|
| C0 | 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-C0 (two-unit set) |
Air preparation for clamp and hold-down cylinders on a fixture line: the filter section strips water and pipe scale from shop air before it reaches the valves, while the low-pressure regulator holds a steady setpoint for repeatable clamping force.
Conditioning the air feeding spray guns and coating applicators, where clean, moisture-free air and a gentle, stable pressure protect finish quality; the manual-drain bowl lets an operator vent accumulated water at each shift start.
Point-of-use conditioning for pick-and-place and label-head actuators on a packaging line; the 1/4 in NPT connection drops into the machine's existing air drop and the fitted bar gauge gives operators a local pressure readout.
Size 300 with a 1/4 in NPT port suits lines plumbed at 1/4 in; step up to size 400 or 600 for larger supply runs, or down to 200 for compact points of use. This unit drains manually, so plan a routine bowl-drain check; automatic and differential-pressure drain variants are available in the family. The 40 um element is the standard grade; specify W for 5 um when finer filtration is needed. The fitted square gauge reads in bar, with MPa and psi scales as alternatives and an external round gauge optional. Thread here is NPT; PT is the standard and G (BSPP) is an order option. No mounting bracket is fitted with this code. Note that the L in the code marks the low-pressure regulator type, and its exact adjustment range is not published in our sheet. Because rated flow is published as curves rather than a single number, send us your flow and pressure requirements 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. 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 rather than a single rated figure, so we do not quote a number here. Send us your required flow and upstream and downstream pressures and we will confirm the sizing from the datasheet on request.
L marks the low-pressure regulator type rather than the standard one. The exact adjustment range for the low-pressure variant is not published in our data sheet, so if your setpoint is specific, ask us to confirm it before ordering. The rest of the code decodes as: 300 size, 1/4 in NPT port, M manual drain, J no bracket, F square gauge, 3 bar scale, T NPT thread.
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.