The AirTAC GFR300C08LJC3WTK AirTAC Filter Regulator NPT1/4 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 GFR300C08LJC3WTK is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in a single body, sized for a 1/4 in NPT port. This configuration carries the 5 um filter element (code W) instead of the 40 um standard, a differential-pressure drain, the low-pressure regulator type, a fitted round gauge with bar scale, and a built-in reverse/check valve (code K); it is supplied without a mounting bracket and with a metal bowl. 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 port sizes from 1/8 in to 1 in, and options for drain type, filter grade, gauge style and scale, thread (PT standard; G and NPT to order), bracket and check valve. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR300C08LJC3WTK AirTAC Filter Regulator NPT1/4 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) |
Feeding clamp cylinders on a machining fixture that runs below standard shop-air pressure: the low-pressure regulator holds the reduced setting while the 5 um element keeps directional valves and check valves free of fine contamination.
Supplying atomizing air to a spray or coating head that needs a reduced, stable pressure; the 5 um grade protects fine nozzle passages, and the built-in check valve stops reverse flow through the unit when the line is shut down.
Regulating air to small cylinders and air-jet nozzles on a packaging conveyor, with the differential-pressure drain removing condensed water in normal operation and the bar gauge giving operators a local pressure readout.
Size 300 with a 1/4 in port sits in the middle of the GFR range; step up to 400/600 or down to 200 depending on the flow your line needs - we can check the curve with you. The 5 um element (code W) suits downstream equipment sensitive to fine particulate; the 40 um standard element is the usual choice for general supply. The differential-pressure drain is the default; automatic (A) and manual (M) drains are order options. The fitted round gauge reads in bar; embedded square gauges with MPa, psi or bar scales are the alternative. This unit is ordered with NPT thread (PT is the AirTAC standard; G/BSPP is also available) and without a bracket. The adjustment range for the low-pressure type is not published in our sheet, so confirm it with us. Flow is published as curves, not a single rating - send us your application and we will confirm sizing 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 this series as curves, not as a single rated figure, so we do not quote a number. Tell us your application and required flow and we will confirm from the datasheet whether this size 300, 1/4 in unit is correctly sized before you order.
This unit carries the L code, so its regulator is the low-pressure type rather than the standard version. The exact adjustment range for the low-pressure type is not published in the sheet we work from, so ask us to confirm it against your setpoint; maximum inlet pressure remains 1.0 MPa (145 psi) and the temperature range is -5 to 70 C.
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.