AirTAC GFR300-08 Filter Regulator (GFR30008LJN)
The AirTAC AirTAC GFR300-08 Filter Regulator (GFR30008LJN) 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.
- TypeFilter regulator
- Port sizePT1/4"
- Regulating range0.15 - 0.9 MPa (20 - 130 psi)
- Filtering grade40 µm
- DrainDifferential-pressure drain
- Bowl materialPC
- Pressure gaugeNot fitted
- ThreadPT
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the AirTAC GFR300-08 Filter Regulator (GFR30008LJN)
GFR30008LJN is an AirTAC G-series filter regulator: a 300-size unit that filters compressed air and regulates its pressure in one body. This configuration is built on a 1/4 in PT port, carries the L code for the low-pressure regulator type, and uses the default differential-pressure drain with the standard 40 um filter element. The N code means no pressure gauge is fitted, and the J code means no mounting bracket is supplied.
This is a genuine AirTAC part. The G-series filter regulator line runs in sizes 200, 300, 400 and 600, with automatic, manual or differential-pressure drains, 40 um or 5 um elements, embedded square or external round gauges in MPa, psi or bar scales, G or NPT thread options and optional brackets. Maximum working pressure is 1.0 MPa (145 psi) and operating temperature is -5 to 70 C, non-freezing. Because rated flow is published as curves rather than a single figure, ask us to confirm the flow and datasheet details for your application.
AirTAC GFR300-08 Filter Regulator (GFR30008LJN) Technical Specifications
| Model | AirTAC GFR300-08 Filter Regulator (GFR30008LJN) |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (PT 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 | Not fitted |
| 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.
Model Code: AirTAC GFR300-08 Filter Regulator (GFR30008LJN)
| 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. |
| N | No pressure gauge (N). |
| (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.
Size Class
- GFR200PT1/8" - PT1/4"
- GFR300PT1/4" - PT1/2"
- GFR400PT3/8" - PT1/2"
- GFR600PT3/4" - PT1"
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) |
Where the AirTAC GFR300-08 Filter Regulator (GFR30008LJN) Is Used
Regulated drop for maintenance benches
Giving a workshop or maintenance bench a filtered, reduced-pressure air point for hand-held pneumatic tools and test rigs, in a gaugeless configuration where the panel already carries its own instrumentation.
Air feed to tail-lift and body controls on trucks
Conditioning the air routed to tipping, tail-lift or door control circuits on commercial vehicles, where a compact filter regulator protects the control valves behind the cab or body.
Low-pressure safety-circuit supply
Providing filtered, reduced air to guard clamps and interlock actuators on a machine safety circuit that already monitors pressure through its own sensing hardware rather than a local gauge.
Is the AirTAC GFR300-08 Filter Regulator (GFR30008LJN) the Right Unit?
Size 300 with a 1/4 in PT port is the mid-range step in the G-series; move up to 400 or down to 200 if your porting or air demand points that way. The L code marks this as the low-pressure regulator type - we confirm its exact adjustment range from the catalogue before you order. Drain is the default differential-pressure type, with automatic (A) or manual (M) drains available as alternatives. Filtration is the standard 40 um grade; the W code selects the finer 5 um element where downstream equipment needs it. This N-coded unit carries no gauge; gauge-inclusive versions with embedded square or external round dials in MPa, psi or bar scales are catalogue options, as are G (BSPP) or NPT threads and a mounting bracket. Flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
Quick checklist
- ✓ Body size for your peak flow (PT1/4" here)
- ✓ Element 40 µm or 5 µm
- ✓ Drain sets the regulating band
- ✓ Gauge fitted, shape and scale
- ✓ Thread PT, G (BSPP) or NPT
- ✓ Oil needed downstream? Use GFC instead
Installation & Maintenance Notes
- check Mount vertically, bowl down, following the airflow arrow.
- check One body does the filtering and the regulating — no separate regulator needed.
- check Keep inlet pressure at or below 1.0 MPa (145 psi).
- check Adjust only within 0.15 - 0.9 MPa (20 - 130 psi).
- check Drain condensate before the bowl fills.
- check Keep the unit above freezing (-5 to +70 °C, unfreeze).
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 GFR300-08 Filter Regulator (GFR30008LJN) FAQ
AirTAC publishes G-series flow as curves rather than a single rated figure, so there is no one number to quote. Give us your application conditions and we will confirm the flow figures from the GFR300 datasheet on request, so you can check the 1/4 in port against your demand before ordering.
N means this unit is supplied without a pressure gauge. Gauge versions of the GFR300 are catalogue options, with an embedded square dial or an external round dial in MPa, psi or bar scales, so you can order a gauge-equipped code if you want local pressure indication instead.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for AirTAC GFR300-08 Filter Regulator (GFR30008LJN)
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.