The AirTAC GFR300-08-J-C2-T 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 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 GFR300-08-J-C2-T is an AirTAC GFR300 filter regulator, a single-body unit that removes water and particulate from compressed air and regulates downstream pressure in one component. This configuration is the 300 size with a 1/4 in NPT port, the standard 40 um filter element, and a differential-pressure drain that bleeds accumulated condensate automatically whenever the pressure differential across the element is high enough. The regulator is the standard type with an adjustment range of 0.15-0.9 MPa (20-130 psi), and an external round gauge on a psi scale is fitted so the set pressure can be read directly. The polycarbonate bowl suits non-freezing compressed-air installations from -5 to 70 C, and maximum inlet pressure is 1.0 MPa (145 psi).
This is a genuine AirTAC part. The GFR range is available in 200, 300, 400 and 600 sizes with port options from 1/8 to 1 in, PT as the standard thread and G or NPT as order options, plus a choice of drain type, 5 um (W) filtration, gauge scale, and bracket arrangements. Rated flow for this series is published as curves rather than a single figure, so ask us to confirm the datasheet and sizing for your application on request.
| Model | GFR300-08-J-C2-T 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, psi 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 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 tool changers, clamps and pneumatic actuators on a machining centre, with the psi gauge letting setters verify set pressure at the machine.
A filtered and regulated drop feeding conveyor diverters and carton-closing cylinders on a packaging line, where the 40 um element protects valve spools from particulate and water.
A point-of-use filter regulator at an assembly bench air drop, conditioning the shop-air supply before it reaches air guns, small cylinders and hand-held pneumatic tools.
Choose the size and port step against the flow your line actually needs: 200, 300, 400 and 600 step up in port and capacity, and this unit sits at 300 with a 1/4 in NPT thread. Drain type is a real decision: differential-pressure (this unit) suits continuously running supply lines, automatic drain (A) for unattended duty, and manual drain (M) where an operator drains on a schedule. Filtration is 40 um as standard or 5 um with the W code if downstream components need finer protection. Gauge scale can be MPa, psi or bar - this unit carries a round psi gauge - and the thread is NPT here, with PT standard and G available to order. Brackets are optional (this configuration is without bracket). Because flow is published 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 GFR300 series as curves rather than a single rated figure, so we do not quote a number. Tell us your application and we will confirm the datasheet and check the sizing for you on request.
The differential-pressure drain (the default, no letter in the code) discharges collected condensate automatically when the pressure drop across the 40 um element rises, so it suits continuously supplied lines. If you prefer a positive automatic drain for unattended duty, order the A code; for scheduled manual draining, order the M code.
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.