The AirTAC GFR300-10 AirTAC Filter Regulator PT3/8, 5 um, Manual Drain 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 GFR300-10 is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body, with a 3/8 inch PT port. This configuration carries the W grade 5 um filter element for finer filtration than the standard 40 um element, a manual drain on the polycarbonate bowl, and the low-pressure regulator type. A round external pressure gauge with a psi scale is fitted, and no mounting bracket is included.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, drain choices (differential-pressure, automatic or manual), 40 um or 5 um filtration, and gauge and thread options. Max inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm datasheet figures for your application.
| Model | GFR300-10 AirTAC Filter Regulator PT3/8, 5 um, Manual Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (PT 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 — 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. 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. |
| 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. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
On a packaging line, this unit conditions the supply air feeding sealing jaws and wrapper actuators: the 5 um element strips water and fine particulate before they reach the valves, while the low-pressure regulator holds the gentle, stable setting those mechanisms need.
Clamp cylinders on a CNC fixture depend on clean, steady air. This filter regulator, mounted at the cell drop, removes condensate and chips-laden moisture from the line and lets the setter dial in the clamping circuit pressure with the fitted psi gauge.
Vacuum and gripper actuators on a robot arm are sensitive to dirty air and pressure drift. Fed through this unit, the gripper circuit gets 5 um filtered air and a manually set, low regulated pressure, with the round gauge giving the operator a direct psi readout.
Size 300 with a 3/8 inch PT port sits mid-range in the GFR line-up; step up or down a size when your flow demand does not match this port. Choose the drain to suit the service: manual (as here) for attended installations with periodic draining, automatic for unattended condensate removal, or the differential-pressure default. The 5 um element (code W) suits finer filtration; the 40 um standard element suits general supply air. The low-pressure regulator type suits circuits set below the standard range; its exact adjustment range is not published, so confirm it with us. Gauge scale can be MPa, psi or bar, and the thread can be ordered as PT (standard), G (BSPP) or NPT. A bracket is optional; this unit is supplied without one. 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. Without the K option, air cannot flow back 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 there is no one flow number we can quote for this unit. Tell us your application and we will confirm the relevant flow and datasheet figures on request before you order.
The M in the code GFR30010MLJC2W means the polycarbonate bowl has a manual drain: someone opens it periodically to discharge collected condensate. That suits attended installations. The same family is also available with an automatic drain or the differential-pressure drain default if you prefer unattended operation.
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.