The AirTAC GFR300-08T AirTAC Filter Regulator NPT1/4, Round Gauge MPa 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 GFR300-08T is an AirTAC filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in one 300-size body. This unit is threaded NPT1/4 (1/4 in), carries the standard 40 um filter element, drains condensate by differential pressure, and is fitted with a round pressure gauge scaled in MPa. The polycarbonate bowl suits the 300 size, maximum inlet pressure is 1.0 MPa (145 psi), the regulation range is 0.15-0.9 MPa (20-130 psi), and the operating temperature is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, PT as the standard thread and G or NPT as order options, plus manual or automatic drain, a 5 um (W) filter grade, square or round gauges scaled in MPa, psi or bar, and an optional reverse/check valve. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR300-08T AirTAC Filter Regulator NPT1/4, Round Gauge MPa |
|---|---|
| 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 | 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. 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". |
| (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). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 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) |
Filter-regulated air for the sealing cylinders and hold-down cups on a carton-sealing machine, keeping film-seal pressure steady through each shift.
Clean, regulated supply to pneumatic clamps and tool-changer actuators on a CNC machining cell, protecting downstream valves from water and swarf carryover.
Steady pressure to diverter and stopper cylinders on a conveyor sortation line so part-actuation timing stays repeatable from the first divert to the last.
Size and port set the capacity: this 300-size unit with its 1/4 in NPT port suits compact supply lines, while the 200, 400 and 600 sizes step down or up. Choose the drain: differential-pressure (this unit, self-discharging with flow), automatic (A), or manual (M) for dry or intermittent duty. The 40 um element is standard; specify W for 5 um where finer filtration is needed. Gauges: an embedded square gauge is standard and an external round gauge (this unit, MPa scale) is optional, with psi or bar scales available. Thread: PT is the standard; G and NPT are order options, and this unit is ordered as NPT. 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 is published as curves rather than a single rated figure, so we do not quote a number here. Tell us your line pressure and the air demand of your equipment, and we will confirm the sizing from the AirTAC datasheet on request.
The differential-pressure drain is the default: it discharges collected condensate automatically as air flows through the unit, with no operator attention. If your line runs intermittently or you prefer to check the bowl visually, the same body can be ordered with a manual (M) or automatic (A) drain instead.
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.