The AirTAC GFR300C08LJF1TK 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 AirTAC GFR300C08LJF1TK is a size 300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body, with a 1/4 in NPT port. This configuration is the low-pressure (L) type, intended for circuits that run below standard regulated pressures; the exact regulation range for the low-pressure type is not published in the catalogue and we confirm it on request. It carries the standard 40 um filter element, a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the bowl is high enough, an embedded square gauge scaled in MPa, and a built-in reverse/check valve that holds downstream pressure if the upstream supply drops. No mounting bracket is included with this code.
This is a genuine AirTAC part from the GFR300 series. The GFR line spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and can be ordered with automatic or manual drains, a 5 um element (code W), psi or bar gauge scales, G (BSPP) or NPT threads in place of the PT standard, and with or without a bracket. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR300C08LJF1TK 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) |
On a carton-sealing or case-packing line, clamp and hold-down cylinders often run at deliberately low regulated pressure so product is gripped without crushing. A filter regulator at each drop cleans the air and holds the setpoint, while the check valve keeps clamps from releasing if the main supply dips during a plant-wide pressure event.
Bottling and filling lines use short-stroke air cylinders to divert, stop and gate containers between conveyors. This unit mounted at the manifold feed removes water and pipe scale that would score the cylinder bores and regulates the supply to the gate circuit, with the MPa gauge giving operators a local setpoint reference.
Test benches and pilot rigs need clean, stable, low-pressure air for instruments, air bearings and actuated fixtures. The low-pressure type suits benches that work well below standard shop-air regulation, the 40 um element protects sensitive fittings, and the built-in check valve prevents back-feed between bench stations sharing one header.
Start with the port step: this unit is size 300 with a 1/4 in NPT port, one step up from the 1/8 in size 200 - match the size to the air consumption of the circuit rather than to the pipe alone. Because flow is published as curves and not as a single rated number, send us your flow and pressure requirements and we will confirm the sizing against the datasheet before you order. Drain choice: this code uses the differential-pressure drain (the default); automatic (A) and manual (M) drains are order options if your duty cycle or access needs differ. Filter grade: the standard 40 um element suits general workshop air; specify the W option for 5 um where downstream equipment needs finer filtration. Gauge: the embedded square gauge here reads in MPa; psi (scale 2) and bar (scale 3) scales can be ordered. Thread: PT is the AirTAC standard, and G (BSPP) or NPT are catalogue options - this code is ordered with NPT. Bracket: J means no bracket is supplied; order a bracketed variant if you mount the unit off the wall or manifold. Note that the L code makes this the low-pressure type - confirm its regulation range with us if your setpoint is near the top of the standard range.
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 as a single rated figure, so we do not quote a rated flow, Cv or SCFM number for this unit. Tell us your operating pressure and air consumption and we will confirm the sizing against the datasheet on request before you order.
K means a reverse/check valve is fitted: if upstream pressure falls, the valve holds the regulated downstream pressure instead of letting it bleed back through the unit. The drain on this code is the differential-pressure type (no drain letter), which discharges collected condensate automatically when the pressure differential across the bowl is sufficient - no manual draining is needed under normal duty. Automatic (A) and manual (M) drains are available as order options.
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.