The AirTAC GFR300C08LJC2 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 GFR300C08LJC2 is an AirTAC GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in one body. This 300-size unit is configured with a PT1/4 (1/4 in) PT-threaded port, the standard 40 um filter element, and a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element rises. It is the low-pressure (L) type, fitted with an external round gauge scaled in psi, and supplied without a mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing); the polycarbonate bowl suits this mid-size frame.
This is a genuine AirTAC part. The GFR family is published in 200, 300, 400 and 600 sizes with port options from 1/8 in to 1 in, drain choices (differential-pressure, automatic or manual), an optional 5 um element (code W), square or round gauges with MPa, psi or bar scales, and G or NPT thread variants to order. Rated flow is published as curves rather than a single figure, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR300C08LJC2 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) |
Feeds filtered, regulated air to clamp cylinders on a CNC fixture line, where the low-pressure type suits circuits holding workpieces at moderate setpoints and the psi gauge lets setters verify clamp pressure at a glance.
Conditions the air feeding conveyor gate and pusher cylinders on a packaging line, with the differential-pressure drain clearing condensate during continuous running so moisture is not carried into the valves.
Serves as the point-of-use filter regulator at an assembly bench air drop, removing water and particulate from the shop main and letting operators set a stable, low supply pressure for hand tools and small actuators.
Start with the port step: this unit is 300 size with a 1/4 in PT port; step up to 400 or 600 if your line's flow demand points to a larger frame, and match the thread to your piping (PT is standard here, with G/BSPP and NPT available as order options). The 40 um element is the standard grade for general plant air; specify the 5 um W-grade variant if downstream equipment needs finer filtration. Drain choice matters: this configuration uses the differential-pressure drain, which discharges condensate on pressure differential without operator attention, while automatic and manual drains are available in the family. The round psi gauge fitted here reads set pressure directly in US units; square embedded gauges and MPa/bar scales are alternatives. Note this is the low-pressure (L) type, so confirm its regulation range against your setpoint before ordering. Because flow is published as curves rather than a single rating, ask us to confirm sizing against your application 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 l/min, m3/h or SCFM number. Tell us your application and we will confirm the flow data from the datasheet on request, so you can size the 300 frame against your demand before ordering.
The L in the code marks the low-pressure regulator type, intended for circuits set below the standard type's range; the exact range for this variant is not published in our sheet, so confirm your setpoint with us on request. The fitted round gauge is scaled in psi, so the regulated outlet pressure can be read directly in US units without conversion.
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.