The AirTAC GFR300C08AF2T AirTAC Filter Regulator 1/4 in NPT 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 See datasheet 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 AirTAC GFR300C08AF2T is a GFR-series filter regulator: one body that removes water and particulate from compressed air and holds downstream pressure at your setpoint. This 300-size unit is threaded 1/4 in NPT, carries the 40 um standard filtration grade, and drains condensate automatically. Its standard regulator adjusts from 0.15 to 0.9 MPa (20-130 psi), an embedded square gauge scaled in psi is fitted, the polycarbonate bowl suits the 300 frame, a mounting bracket is included, no reverse/check valve is fitted, and the working temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and options including manual or differential-pressure drains, a 5 um (code W) filtration grade, gauge scales in MPa, psi or bar, G or NPT threads in place of the PT standard, and low-pressure or check-valve variants. Flow is published as curves rather than a single rating, so ask us to confirm figures from the datasheet for your application.
| Model | GFR300C08AF2T AirTAC Filter Regulator 1/4 in NPT |
|---|---|
| Series | GFR300 filter regulator |
| Port size | See datasheet (PT 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 — factory standard, Factory standard 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. |
|---|---|
| C0 | Port size See datasheet. 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). |
| (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.
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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C0 (two-unit set) |
Feeds clean, moisture-filtered air to the pneumatic clamps on a machining centre fixture, with the regulator set so clamping pressure stays where the fixture was set up - the psi gauge lets the setter read the setting at a glance.
Sits at the drop to a spray gun station, knocking water and pipe scale out of the shop air line and holding a steady gun inlet pressure so the finish stays consistent across a shift.
Prepares air for the small cylinders on a carton-sealing or labelling head: the 40 um grade keeps debris out of the valve stack, and the automatic drain handles condensate on a line that runs unattended.
Step through the real, decodable choices. Size: 200, 300, 400 or 600, with ports from 1/8 in to 1 in - this 300 with a 1/4 in NPT port suits compact circuits. Drain: automatic (this unit, for unattended condensate removal), manual, or differential-pressure; note the setting range depends on the drain - 0.15-0.9 MPa (20-130 psi) with automatic or differential-pressure drains, 0.05-0.9 MPa (7-130 psi) with manual. Filtration: 40 um standard or the 5 um W option. Gauge: embedded square as standard with MPa, psi or bar scales. Thread: PT is the standard; G and NPT are ordered options - this unit is NPT. Bracket included as standard.
One honest routing note: flow for the GFR300 is published as curves, not a single rating, so send us your line pressure and air demand and we will confirm 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 GFR300 as curves rather than a single rated figure, so we do not quote a number here. Tell us your operating pressure and air demand and we will confirm the sizing from the datasheet on request.
The automatic drain expels collected condensate without daily attention, which suits enclosed cabinets, overhead drops or hard-to-reach installs. Note that the regulator setting range depends on drain type: 0.15-0.9 MPa (20-130 psi) with this automatic drain, versus 0.05-0.9 MPa (7-130 psi) with a manual drain. Manual and differential-pressure drain versions can be ordered instead if you prefer.
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.