The AirTAC GFR300C08LJC1TK 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 GFR300C08LJC1TK is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration is built around a 1/4 in NPT port, the standard 40 um filter element and a differential-pressure drain that handles collected condensate without a manual twist. The regulator is the low-pressure type, an external round gauge with an MPa scale is fitted for setpoint readout, and the K code means a reverse (check) valve is built in to hold downstream pressure through upstream dips. The bowl on this size 300 unit is polycarbonate (PC). Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing. The unit is supplied without a mounting bracket.
This is a genuine AirTAC part. The GFR300 line sits in the GFR size range that steps from 200 through 300, 400 and 600, with larger sizes carrying larger ports and more flow, and with PT, G (BSPP) and NPT thread options to order. Flow for this family is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures for your application on request.
| Model | GFR300C08LJC1TK 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 and hold-down cylinders that must run well below standard shop-air pressure: the low-pressure regulator trims the supply to the setpoint while the 40 um element strips water and pipe scale ahead of the machine's directional valves, and the MPa gauge gives the setter a clear readout.
Positioned at the booth drop, the filter section removes water and particulate before the regulated outlet feeds the spray guns, protecting finish quality from moisture spotting; the round gauge lets the operator verify the regulated pressure at a glance.
Installed on a drop leg off the main header, the built-in check valve holds downstream pressure through upstream supply dips so actuators do not sag mid-cycle, while the differential-pressure drain deals with condensate collected in the polycarbonate bowl.
Start with the port step: this unit is the size 300 body with a 1/4 in NPT port; if your line needs a bigger bore, the same family steps up through 3/8 in, 1/2 in, 3/4 in and 1 in at sizes 400 and 600. Drain choice is real: differential-pressure (this unit), automatic (A) or manual (M). Filter grade is a choice too: 40 um standard as fitted here, or the W code for a 5 um element where finer filtration is needed. Gauge options cover the embedded square gauge or the external round gauge fitted here, with MPa, psi or bar scales. Thread is PT as the AirTAC standard with G (BSPP) and NPT as order options - this code specifies NPT. Brackets are optional (J here means none supplied) and the K code adds the reverse/check valve. One honest note: flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
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 family as curves rather than a single rated figure, so we do not quote a number on the page. Send us your line pressure, port size and expected air demand, and we will confirm the sizing against the AirTAC datasheet for you before you order.
The L code makes this unit the low-pressure regulator variant rather than the standard one, intended for circuits that run at reduced pressure. The exact adjustment range for the low-pressure variant is not published in our data extract, so confirm it with us on request; the maximum working (inlet) pressure remains 1.0 MPa (145 psi).
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.