The AirTAC GFR300C08MLJF3WT AirTAC Filter Regulator 1/4 in NPT 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 GFR300C08MLJF3WT is a filter regulator: a 5 um air filter and a pressure regulator combined in one body, so a single unit removes water and particulate and holds the working pressure downstream. This configuration is built for 1/4 in NPT ports in the GFR300 size, with a manual drain for emptying the metal bowl, a low-pressure regulator type for circuits that run at reduced settings, an embedded square gauge reading in bar, no mounting bracket and no reverse/check valve. 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, and options for thread (PT standard, G and NPT to order), drain type (differential-pressure, automatic or manual), filter grade (40 um standard, 5 um optional) and gauge scale (MPa, psi or bar). Flow for this series is published as curves rather than a single rated figure; ask us and we will confirm the datasheet and sizing figures for your application on request.
| Model | GFR300C08MLJF3WT AirTAC Filter Regulator 1/4 in NPT |
|---|---|
| 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) |
Supplying filtered, regulated air to pneumatic clamps and fixtures on a machining centre, where the low-pressure regulator holds a reduced setting and the 5 um element protects the clamp valves from water and swarf-contaminated air.
Feeding pick-and-place cylinders and grippers on a packaging conveyor, with the manual-drain bowl emptied at shift checks and the square bar gauge giving operators a local pressure readout at the machine.
Point-of-use preparation at bench assembly stations, combining filtration and regulation in a single body where panel space for a separate filter and regulator is not available.
Choose the size step (200/300/400/600) and port to match the air demand of the circuit; this unit is the GFR300 size with 1/4 in NPT ports. Pick the drain to suit access: manual, as coded here, where someone attends the machine, or automatic / differential-pressure where the unit is hard to reach. Select 5 um filtration (this code) for finer protection of downstream components, or 40 um for general duty, and choose the gauge scale - MPa, psi or bar; this unit carries an embedded square gauge reading bar. Thread is NPT on this code; PT is the standard and G is an order option, and a mounting bracket can be specified if the code omits it. Because flow is published as curves rather than a single rating, send us your flow and pressure requirements and we will confirm the right size 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 GFR300 series as curves rather than a single rated figure, so we do not quote one number. Send us your flow and working-pressure requirements and we will confirm the datasheet figures and check the sizing against your application on request.
This code carries a manual drain: the metal bowl is emptied by hand, which suits units mounted where the machine is attended regularly. The same GFR300 filter-regulator size is also available with automatic or differential-pressure drains if the unit sits where routine draining is impractical - ask us for the alternative 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.