The AirTAC GFR300-10 AirTAC Filter Regulator 3/8in PT 5um 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 AirTAC GFR300-10 is a size-300 filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries a 3/8 in PT port, a 5 um filter element (the finer of the two catalogue grades), a manual drain for the PC bowl, a fitted reverse/check valve, and an external round gauge scaled in psi. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator adjusts from 0.05 to 0.9 MPa (7-130 psi), and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of 40 um or 5 um filtration, differential-pressure, automatic or manual drains, embedded square or external round gauges (MPa, psi or bar scales), and G or NPT thread options. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR300-10 AirTAC Filter Regulator 3/8in PT 5um 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 | 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. |
| 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. |
| 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) |
Feeding clean, pressure-controlled air to bench-top test rigs and analytical instruments, where the 5 um element protects sensitive pneumatic controls from water and fine particulate.
Conditioning and regulating the air feed to tool-clamp and chip-clearing circuits on a machining centre, with the psi gauge giving operators a direct setpoint readout.
Supplying filtered, regulated air to pick-and-place and carton-sealing cylinders on a packaging line, with the check valve holding the set circuit against backflow.
Choose the size and port step against the air demand of the circuit: the GFR300 with its 3/8 in PT port sits mid-range in the GFR line, with smaller 200 and larger 400/600 bodies available when flow requirements differ. This unit is ordered with the 5 um element (code W) instead of the 40 um standard - pick 5 um where downstream valves, cylinders or instruments need finer protection. The manual drain (code M) means an operator opens the bowl drain periodically, which suits attended installations; automatic or differential-pressure drains are available for unattended duty. The round gauge is scaled in psi here, with MPa and bar scales and an embedded square gauge as alternatives. PT is the standard thread; G (BSPP) and NPT are order options. This code carries no mounting bracket (code J). Because flow is published as curves rather than 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 the GFR series as curves rather than a single rated figure, so no one number describes it. Tell us your application and required flow, and we will confirm the datasheet curve figures for this 3/8 in size-300 unit on request before you order.
The manual drain (code M) means condensate is emptied by opening the bowl drain during routine checks, which suits attended installations; automatic and differential-pressure drains are available for unattended duty. The 5 um element (code W) is the finer of the two catalogue grades - the standard is 40 um - and is chosen where downstream valves, cylinders or instruments need finer protection.
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.