The AirTAC GFR300-10 AirTAC Filter Regulator PT3/8 Manual Drain 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 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 body. This 300-size unit is threaded PT3/8 (3/8 in, PT standard), carries the standard 40 um filter element, and is fitted with a manual drain, so condensate is emptied by hand rather than automatically. Outlet pressure is adjusted across 0.05-0.9 MPa (7-130 psi) and read on the supplied round psi gauge, and a reverse/check valve is fitted to hold the downstream setting if the supply is interrupted. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits the 300 size frame.
This is a genuine AirTAC part. The GFR filter-regulator family spans sizes 200, 300, 400 and 600 with a choice of ports, PT/G/NPT threads, manual, automatic or differential-pressure drains, a 5 um element option, gauge styles and scales, and a low-pressure type. Flow figures are published as curves rather than a single rating, so we confirm the datasheet numbers for your application on request.
| Model | GFR300-10 AirTAC Filter Regulator PT3/8 Manual Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (PT 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 | 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 0.05 - 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. |
|---|---|
| 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)). |
| (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. |
| (blank) | PT 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Point-of-use clean, regulated air for a carton-sealing or wrapping line: the 40 um element strips water and pipe scale before the valves, the regulator holds a steady setting, and the check valve keeps the circuit pressurised during brief supply dips.
Feeding cylinders and air-driven stoppers on a conveyor system, where the manual-drain bowl is bled during scheduled shifts and the psi gauge lets maintenance verify the setting the actuators were designed around.
Mounting at the inlet of a control panel that feeds directional valves and air logic: one body does the filtering and the regulating, the round gauge gives at-a-glance pressure, and the 3/8 in PT port matches standard panel pipework.
Size and port are the first choice: step up through 200, 300, 400 and 600 as your required flow and port size grow - this unit is 300 size with a 3/8 in PT port. Choose the drain to match maintenance routines: manual (as here) needs someone to bleed the bowl, automatic drains itself, and differential-pressure drains only when the element loads up. The standard element is 40 um; specify the W option for 5 um where finer filtration matters. Gauges are available embedded square or external round, in MPa, psi or bar scales - this unit has a round psi gauge. PT is the standard thread; G (BSPP) and NPT are order options. A bracket can be ordered where panel fixing is needed, and the K option adds a reverse/check valve (fitted here).
Because flow is published as curves rather than a single rated figure, 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes GFR flow as curves rather than a single rated number, so we do not quote a flow figure here. Tell us your application and we will confirm the relevant flow data from the datasheet on request before you order.
The M in the code means the condensate bowl is emptied by hand, which suits lines with regular maintenance rounds. The same series can be ordered with an automatic drain or a differential-pressure drain instead, and the manual-drain version also allows the widest regulation range, 0.05-0.9 MPa (7-130 psi).
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.