The AirTAC AirTAC GFR300-08G Filter Regulator, G1/4, 40 um, psi gauge 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR300-08G is a size-300 filter regulator that removes water and particulate from compressed air and sets downstream pressure in a single body. This configuration has G1/4 (BSPP) ports, a manual drain bowl, the standard 40 um filter element, a standard-range regulator adjustable from 0.05 to 0.9 MPa (7-130 psi), and an external round gauge with a psi scale. A mounting bracket is included and the polycarbonate bowl is drained by hand, so you decide when to bleed off collected condensate.
This is a genuine AirTAC part. The GFR family is offered in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, thread options PT (standard), G and NPT, manual, automatic or differential-pressure drains, 40 um or 5 um (W) filtration, gauge and scale choices, and a low-pressure regulator type. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | AirTAC GFR300-08G Filter Regulator, G1/4, 40 um, psi gauge |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (G (BSPP) thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual 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 0.05 - 0.9 MPa (7 - 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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. |
| 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. |
| G | G (BSPP) 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) |
Conditioning the shop-air feed to a machining centre's pneumatic valves and actuators: the 40 um element strips water and swarf-laden particulate before it reaches the directional valves, while the regulator holds a steady set pressure for consistent clamping and tool-change action.
Feeding pick-and-place and carton-closing cylinders on a packaging conveyor: the filter stage keeps moisture out of the cylinder seals and the regulator lets the line supervisor set and read the actuation pressure on the psi gauge for repeatable, gentle product handling.
A point-of-use station at an assembly bench fed from the main plant ring main: the GFR300-08G cleans and regulates the branch supply locally, the manual drain lets the operator clear collected condensate at shift start, and the psi gauge gives a visible reference for the tools connected downstream.
Start with the size and port step: 300 is the mid range of the GFR family, and the 08 position gives 1/4-inch ports, so match that against the line size and the flow your circuit needs. Because flow is published as curves rather than a single rating, ask us to confirm sizing against your application before ordering. The manual drain on this unit suits supervised installations where an operator can bleed the bowl; choose the automatic or differential-pressure drain variant instead for unattended duty. The 40 um element is the standard grade - specify the W code if you need 5 um. This unit carries a round psi gauge; square embedded gauges and MPa or bar scales are alternatives, and PT is the standard thread with G and NPT as order options. A mounting bracket is included.
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 GFR flow as curves rather than a single rated figure, so we do not quote a rated flow number. Tell us your line size and the flow your application needs and we will confirm the sizing from the datasheet curves on request before you order.
The M code in GFR30008MC2G specifies a manual drain: you bleed collected condensate from the polycarbonate bowl by hand, which suits supervised installations. If the unit will run unattended, order the automatic-drain (A) or differential-pressure-drain (blank) variant of the same GFR300-08 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.