The AirTAC GFR30008AJNT AirTAC Filter Regulator NPT1/4 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 automatic 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 GFR30008AJNT is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in one body, with a single 1/4 in NPT port connection. It removes water and particulate from compressed air and holds a regulated downstream pressure adjustable from 0.15 to 0.9 MPa (20-130 psi). This configuration carries the 40 um standard filter element, an automatic drain that expels collected condensate without manual attention, and no gauge fitted. The polycarbonate bowl suits the 300 size, and the maximum inlet pressure is 1.0 MPa (145 psi) with an operating temperature of -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family is available in 200, 300, 400 and 600 sizes with port options from 1/8 in to 1 in, a choice of 40 um or 5 um (W) filtration, differential-pressure, automatic or manual drains, optional gauges, and PT, G or NPT threads. Flow for this series is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR30008AJNT AirTAC Filter Regulator NPT1/4 |
|---|---|
| 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 | 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 | Automatic 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. 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. |
|---|---|
| 08 | Port size PT1/4". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| A | Drain: Automatic 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. |
| 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. |
| 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) |
Clean, regulated air feeding the pneumatic tool changers, clamps and purge circuits on a machining centre, with automatic drainage keeping condensate out of the valves.
Conditioning the air that drives pick-and-place and carton-sealing cylinders on a packaging conveyor, holding a steady set pressure so cycle motion stays repeatable.
A filter-regulator drop at an individual work cell on the factory air main, giving that cell its own clean air and its own pressure setting independent of the header.
Size and port set the flow path: the 300 size with a 1/4 in NPT port sits in the middle of the GFR range, one step up from the 200 size - step up to 400 or 600 if your line demands more air. Drain choice matters day to day: the automatic drain on this unit suits unattended or hard-to-reach installations, while manual and differential-pressure drains are the other catalogue options. Filtration is 40 um standard; order the W variant if you need 5 um. A gauge is not fitted on this code, but gauge options with MPa, psi or bar scales exist in the family. Thread is NPT here, with PT (standard) and G available to order; a bracket is not included (J code).
Because flow is published as curves rather than a single rating, we cannot quote one number here. Send us your application details and we will confirm the sizing against the datasheet before you order.
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, not as a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the flow from the datasheet on request before you order.
The A code on this unit means an automatic drain: collected condensate is expelled from the polycarbonate bowl without anyone opening it. Choose automatic for installations that are unattended or awkward to reach; manual and differential-pressure drains are the other catalogue 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.