The AirTAC GFR30008LJC3T 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 PT1/4" 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 GFR30008LJC3T is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body, sized 300 with a 1/4 in NPT port. This unit is the low-pressure type, fitted with the standard 40 um filter element and a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element rises. The polycarbonate bowl lets you see the liquid level at a glance, a round gauge with a bar scale is fitted so the set pressure is readable at the wall of the unit, and no mounting bracket is included. Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600 with a choice of ports, drain types (differential-pressure, automatic or manual), a 5 um element option (code W), gauge styles and scales, PT, G or NPT threads, and bracket options. Flow is published by AirTAC as curves rather than a single rated figure, so we confirm the datasheet and flow figures for your application on request.
| Model | GFR30008LJC3T AirTAC Filter Regulator NPT1/4 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure 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 — round, bar 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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. |
|---|---|
| 08 | Port size PT1/4". 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)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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 · PT1/4" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
On a fixture-clamping circuit that holds workpieces at reduced pressure, this low-pressure type filter regulator cleans the supply and holds the set pressure locally at the 1/4 in NPT connection ahead of the clamping valve.
Feeding the small-bore cylinders on a carton sealing or case packing conveyor, the unit strips water and 40 um particulate from the shop air and lets an operator read and adjust cylinder speed pressure on the fitted bar gauge.
On a laboratory or QC test bench running pneumatic instruments, the transparent polycarbonate bowl with differential-pressure drain keeps condensate out of the bench circuit while the low-pressure regulator holds a stable, low set pressure.
Start with the port step: this unit is size 300 with a 1/4 in NPT port; larger sizes (400, 600) carry larger ports and more flow capacity, so step up if your line demand is high. Choose the drain to match maintenance access: differential-pressure (this unit) drains itself on load changes, automatic (code A) suits unattended installations, and manual (code M) needs periodic draining. The standard element is 40 um; specify the W option for 5 um where downstream equipment needs finer filtration. Gauge style and scale are selectable (square embedded or external round; MPa, psi or bar - this unit has a round bar gauge), the thread can be ordered as PT (standard), G or NPT, and a bracket can be added where wall or panel fixing is needed. Because AirTAC publishes flow as curves rather than a single rating, 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 the GFR series as performance curves rather than a single rated figure, so we do not quote a number such as l/min or SCFM. Tell us your inlet pressure and required downstream flow and we will confirm the sizing from the datasheet on request before you order.
This unit has the differential-pressure drain (the default): collected condensate is discharged automatically when the pressure differential across the 40 um element rises, with no operator action. If the unit will sit unattended or cycle infrequently, the automatic drain (code A) is the better choice; if maintenance staff visit the installation regularly, the manual drain (code M) is the simplest option.
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.