The AirTAC GFR300-10 AirTAC Filter Regulator G3/8, 5 um, Low-Pressure is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT3/8" 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 GFR300-10 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single compact body. This configuration is the size 300 unit with a G3/8 (BSPP) port, a fine 5 um filter element (the W grade, tighter than the 40 um standard), a manual drain for bowl condensate, and the low-pressure regulator type for circuits that run below standard main-line pressures. It ships with the embedded square gauge scaled in psi, a reverse/check valve fitted, and a mounting bracket included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, a choice of drain types, 40 um or 5 um filtration, gauge scale options, and PT, G or NPT threads. Flow figures are published as curves rather than a single rating, so ask us and we will confirm the datasheet numbers for your application before you order.
| Model | GFR300-10 AirTAC Filter Regulator G3/8, 5 um, Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (G (BSPP) thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 130 psi) |
| Pressure type | Low-pressure 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 — 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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. |
|---|---|
| 10 | Port size PT3/8". 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)). |
| L | Low-pressure 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. |
| W | Filtering grade 5 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Clamp fixtures and vises on a CNC cell often run at reduced pressure to hold parts without distortion. The GFR300-10 filters the shop air to 5 um and regulates the clamp circuit at low pressure, with the psi gauge giving operators a direct readout at the fixture.
Carton sealers, labelers and wrap stations use air cylinders that run gentler than the plant main. Feeding them through this filter regulator keeps moisture and fine debris out of the valves while holding a stable low setpoint, and the check valve holds the circuit if upstream supply dips.
Diverters, pushers and cleaning blasts along a conveyor line need clean, low-pressure air. The 5 um element protects the small pilot valves, the manual drain lets maintenance empty the bowl during scheduled stops, and the bracket mounts the unit at the line panel.
Size 300 with a 3/8 port sits mid-range in the GFR line: step up to 400 or 600 for larger flow demand, or down to 200 for compact circuits - match the size step to the flow your line needs, and we will confirm the curve data. This unit carries the 5 um element; if your application tolerates coarser air, the 40 um standard grade is the lower-cost choice. The manual drain means an operator vents the bowl - choose automatic or differential-pressure drain if the unit is mounted where routine access is awkward. The low-pressure regulator type suits circuits running below standard main-line pressure; its exact adjustment range is not published, so confirm it with us. Gauge scale (MPa, psi or bar), thread (PT standard, G or NPT to order) and the bracket are all specified at ordering.
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 curves, not as 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 against the datasheet curve before you order.
The 5 um (W) element captures finer particles and more entrained moisture than the 40 um standard grade, which suits downstream valves, cylinders and instruments that are sensitive to contamination. The manual drain means the bowl is emptied by hand at intervals - if the unit will be mounted where routine access is difficult, ask us about the automatic or differential-pressure drain variants of the same size.
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.