AirTAC GFR300-08 Filter Regulator (GFR30008LJC1W)
The AirTAC AirTAC GFR300-08 Filter Regulator (GFR30008LJC1W) is a genuine G-series filter regulator: water separation, 5 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 grade5 µm
- DrainDifferential-pressure drain
- Bowl materialPC
- Pressure gaugeFitted
- 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 (GFR30008LJC1W)
GFR30008LJC1W is an AirTAC G-series filter regulator: a 300-size unit that filters compressed air and regulates its pressure in a single 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 a 5 um filter element (the W grade, finer than the 40 um standard). It is supplied with the external round pressure gauge scaled in MPa and without a mounting bracket (J).
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 (GFR30008LJC1W) Technical Specifications
| Model | AirTAC GFR300-08 Filter Regulator (GFR30008LJC1W) |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (PT thread) |
| Filtering grade | 5 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, MPa 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.
Model Code: AirTAC GFR300-08 Filter Regulator (GFR30008LJC1W)
| 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. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Where the AirTAC GFR300-08 Filter Regulator (GFR30008LJC1W) Is Used
Low-pressure pilot air for process valves
Feeding filtered, reduced-pressure air to the pilot actuators of diaphragm control valves on a water-treatment or chemical-dosing skid, where the actuator circuit calls for a gentle regulated supply rather than full line pressure.
Instrument air for laboratory equipment
Conditioning the air feed to lab pneumatic pumps, agitators and sample-handling cylinders, where the fine 5 um element helps keep moisture and particles out of sensitive instrument circuits.
Hold-down clamps on assembly fixtures
Supplying regulated air to low-pressure hold-down and positioning clamps on a machining or assembly fixture, with filtered air protecting the small clamp cylinders between cycles.
Is the AirTAC GFR300-08 Filter Regulator (GFR30008LJC1W) the Right Unit?
Size 300 with a 1/4 in PT port sits mid-range in the G-series: step up to size 400 or down to size 200 if your line porting or air demand points that way. The L code marks this as the low-pressure regulator type; we will 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 orderable alternatives. The W suffix selects the 5 um element instead of the standard 40 um; choose 5 um where downstream valves and cylinders need finer filtration. Gauge and scale are selectable - embedded square or external round, in MPa, psi or bar - and the thread can be ordered as PT, G (BSPP) or NPT. Flow for this unit 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 (GFR30008LJC1W) FAQ
AirTAC publishes flow for the G-series as curves rather than a single rated figure, so we do not quote a number here. Tell us your line conditions and we will confirm the flow figures from the GFR300 datasheet on request, so you can size the 1/4 in port against the application before ordering.
L marks the low-pressure regulator type - it regulates to reduced pressures rather than the standard span, and we confirm the exact adjustment range from the catalogue for you. W selects the finer 5 um filter element instead of the 40 um standard. Both are catalogue options on the GFR300 series.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
Request a Quote for AirTAC GFR300-08 Filter Regulator (GFR30008LJC1W)
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.