The AirTAC GFR300-10 AirTAC Filter Regulator, NPT 3/8, Low-Pressure 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 size 300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built for reduced-pressure circuits, with the low-pressure regulator type, a 40 um standard filtration element, a manual drain bowl in polycarbonate, and a 3/8 in NPT port. A reverse/check valve is fitted to hold downstream pressure, and the external round MPa gauge lets you read and set the outlet pressure directly. A mounting bracket is included.
This is a genuine AirTAC part. The GFR line is offered in sizes 200, 300, 400 and 600 with a choice of ports, thread types (PT standard, G and NPT as order options), drain types, 40 um or 5 um filtration, gauge styles and scales. Flow is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR300-10 AirTAC Filter Regulator, NPT 3/8, Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 40 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 — round, MPa 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). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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) |
Feeds and regulates the air to clamping fixtures on a CNC machining cell, filtering water and chips-carried condensate from the shop air line while holding the fixture circuit at the reduced pressure the clamps were set up for. The check valve keeps the clamp from releasing if the main supply drops.
Conditions and regulates the supply to the pick-and-place cylinders and diverters on a carton packaging conveyor, removing water and particulate before it reaches the valves. The manual drain suits a line that is blown down at shift end, and the round MPa gauge gives the operator a visible setpoint.
Prepares air for a bench-mounted blow-off or spray station that runs at reduced pressure: the low-pressure regulator type gives finer control in the lower part of the range, the 40 um element stops particulate reaching the nozzle, and the check valve prevents backflow into the drop.
Start with the port step: this unit is size 300 with a 3/8 in NPT port; step up to size 400 or 600 when the circuit needs more flow capacity, or down to size 200 for compact lines. Choose the drain to match service: manual drain (this unit) needs periodic bowl draining, while automatic and differential-pressure drains discharge condensate without operator attention. The 40 um element is the standard grade; specify 5 um (code W) where finer particulate removal matters. The low-pressure regulator type suits circuits held at reduced pressure - we confirm its exact adjustment range from the datasheet on request. Gauge scales are offered in MPa, psi or bar, and the fitted check valve holds downstream pressure on supply loss. Thread is PT as standard, with G and NPT as orderable options; a bracket is included. Because flow is published as curves and not a single rating, 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 flow for this series as curves rather than a single rated figure, so we do not quote one number. Tell us your line pressure and the flow your application needs, and we will confirm from the datasheet whether the size 300, 3/8 in unit is the right step - or whether you should move to size 400 or 600.
M in the code is the manual drain: condensate collects in the polycarbonate bowl and is released by opening the drain, which suits stations that are checked regularly. Automatic or differential-pressure drains are available on other variants if you cannot drain by hand. The trailing K means a reverse/check valve is fitted, holding downstream pressure if the upstream supply is lost. The C1 gives you the external round gauge with an MPa scale, and the L marks the low-pressure regulator type.
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.