The AirTAC GFR300-08 AirTAC Filter Regulator G1/4, 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 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 GFR300-08 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 300-size unit is fitted with a G1/4 (BSPP) port, the standard 40 um filter element and a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element is high enough - no daily manual draining on lightly loaded lines. The square pressure gauge is fitted and reads in psi, the outlet pressure is adjustable over 0.15-0.9 MPa (20-130 psi), and the built-in reverse/check valve holds the set downstream pressure if the upstream supply is lost. A mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi); working temperature 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 to 1 inch, and is available with automatic, manual or differential-pressure drains, a 5 um element (code W), MPa/psi/bar gauge scales, and G or NPT threads as order options; the 300-size polycarbonate bowl suits this unit. Rated flow for this series is published as curves rather than a single figure - ask us and we will confirm the datasheet and sizing for your application on request.
| Model | GFR300-08 AirTAC Filter Regulator G1/4, psi gauge |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (G (BSPP) 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 — square, psi scale |
| Reflux valve | Fitted (reverse flow permitted) |
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). |
| F | Gauge shape: Square. 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. |
| K | Reverse-flow (reflux) valve fitted. |
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) |
On a bench-mounted pneumatic press or fixture-clamping manifold, this unit cleans the shop air to 40 um and holds a steady, operator-set clamping pressure at the G1/4 drop, with the check valve keeping the clamp circuit pressurised through supply dips.
Air-driven diverters, stoppers and pushers along a packaging or bottling conveyor need clean, moisture-free air at a fixed pressure to act consistently; this filter regulator mounted at the line drop supplies exactly that, with automatic condensate handling under continuous flow.
At an assembly bench running air impact drivers, nutrunners and blow guns, this unit conditions the supply - removing water and grit that shorten tool life - and lets each station set its own regulated pressure at the 1/4-inch outlet, gauge in psi for easy checks.
Start with the port step: this unit is 300 size with a G1/4 port; step up to 400 or 600 if your line has grown beyond it, or down to 200 for compact drops. Choose the drain to match the duty - differential-pressure (this unit) drains itself under load, automatic suits intermittent flow, manual suits dry indoor air with someone checking the bowl. The standard element is 40 um; specify the W option for 5 um if downstream valves or cylinders need finer protection. The fitted square gauge reads psi here; MPa and bar scales are also available. Thread is G (BSPP) on this unit - PT is the standard thread and G/NPT are order options - and the bracket is included. Flow for this series is published as curves, not a single rating, so send us your application 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as performance curves rather than a single rated figure, so we do not quote a number. Tell us your application and required flow, and we will confirm the figures from the datasheet and check the sizing for you on request.
The blank drain code on GFR30008F2GK means a differential-pressure drain: condensate collected in the bowl is discharged automatically when the pressure drop across the 40 um element rises, so no one has to drain it by hand. If your air is dry or flow is intermittent, the same unit can be ordered with an automatic (code A) or manual (code M) 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.