The AirTAC GFR300C08MLJF2 AirTAC Filter Regulator PT1/4, Low-Pressure 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 AirTAC GFR300C08MLJF2 is a filter regulator: one body that removes water and particulate from compressed air and then regulates the downstream pressure. This 300-size unit is threaded PT1/4 (PT as standard; G and NPT are order options), carries a 40 um filter element, and drains by hand - an operator opens the manual drain at the base of the polycarbonate bowl to expel collected water. The regulator is the low-pressure type, intended for circuits that run at modest regulated pressures; the exact adjustment span for this type is not published in the data we work from, and we confirm it on request. An embedded square gauge reading in psi is fitted, 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, a 5 um element (code W), an external round gauge in MPa, psi or bar scales, a reverse/check valve, G or NPT threads, and with or without a mounting bracket - this unit is supplied without a bracket and without a check valve. Flow is published as curves rather than a single rated figure, so send us your application and we will confirm the sizing and full datasheet figures before you order.
| Model | GFR300C08MLJF2 AirTAC Filter Regulator PT1/4, Low-Pressure |
|---|---|
| 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) |
A filter regulator feeding spray guns in a finishing booth: the 40 um element drops water and debris before the gun while the low-pressure regulator holds the atomizing pressure the finish calls for, with the psi gauge giving the operator a clear set point.
Pneumatic cylinders and grippers on a cartoning or wrapping line take air through this unit: filtered and regulated at a stable low pressure so sealing jaws and product handling stay repeatable shift after shift, with the manual drain emptied during routine changeover.
A bench test rig that needs a modest, carefully set supply pressure: the low-pressure regulator and square psi gauge let an operator dial in the set point, while the manual drain clears accumulated water from the bowl between sessions.
Choose the size by port and flow: 300 covers PT1/4 here, and stepping to 400 or down to 200 changes both the connection and the flow capacity - because flow is published as curves rather than one rated number, ask us to check the curve against your air demand before ordering. This unit's regulator is the low-pressure type: select it where the circuit runs at low regulated pressures, and confirm the exact adjustment range with us. Decide the drain: this unit is manual (open the bowl drain periodically); the family also offers automatic and differential-pressure drains where checks cannot be scheduled. Element grade is 40 um as coded; specify W for 5 um where finer particulate protection is needed. The fitted square gauge reads psi, with MPa and bar scales and an external round gauge as alternatives. Thread is PT as standard with G (BSPP) and NPT as order options, and a mounting bracket can be added if the unit will not sit directly on a manifold or machine surface.
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 inlet pressure and the downstream flow your circuit needs, and we will confirm the sizing from the datasheet curves before you order.
Manual drain means an operator opens the drain at the base of the bowl to release collected water - simple and dependable where the unit is inspected during normal maintenance rounds. If the installation is unmanned or checks are infrequent, the same family is available with automatic or differential-pressure drains; this coded unit is the manual version.
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.