The AirTAC GFR300C08LJF3TK 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 GFR300C08LJF3TK is an AirTAC GFR filter regulator: water and particulate filtration plus pressure regulation combined in a single body. Air passes through a 40 um element, then flows to the regulator, which is the low-pressure type for circuits that run below standard line pressure. This unit is sized 300 with a 1/4 in NPT port, drains condensate by differential pressure, carries an embedded square gauge reading in bar, and is fitted with a reverse (check) valve, code K. No mounting bracket is included (code J), and the 300-size bowl is polycarbonate (PC); only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options including automatic or manual drains, a 5 um element (code W), external round gauges with MPa, psi or bar scales, G (BSPP) or NPT threads in place of the PT standard, and brackets. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300C08LJF3TK 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) |
Conditions and regulates the 1/4 in air drop feeding a light-duty pneumatic clamp or fixture that is designed to run below standard shop pressure, with the 40 um element keeping scale and pipe debris out of the clamp valve.
Sits at the drop feeding the cylinders and actuators on a cartoning or case-sealing conveyor, filtering condensed water from the header and holding a steady low regulated pressure for consistent box handling.
Filters and regulates the air to a CNC workholding or tool-clamp circuit, where the fitted check valve helps hold the downstream setting if the shop supply dips during a cycle.
Choose the size by port and flow demand: this 300 unit carries a 1/4 in NPT port; step up to 400 or 600 where the line needs more flow, or down to 200 for compact circuits. Drain is differential-pressure here (the standard), with automatic (A) and manual (M) versions available. The 40 um element is standard; specify code W for 5 um finer filtration. The embedded square gauge is fitted reading in bar; round external gauges with MPa, psi or bar scales can be ordered. Thread is NPT on this code; PT is the AirTAC standard and G (BSPP) is an order option. J codes omit the bracket. 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.
Flow for the GFR300 series is published as curves rather than a single rated figure, so we do not quote a number here. Send us your application details or your flow target and we will confirm the datasheet figures, and the right size, before you order.
L marks the low-pressure regulator type, intended for circuits that run below standard line pressure. The exact adjustment range for this type is not published in the catalogue, so ask us and we will confirm it from the datasheet. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
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.