The AirTAC GFR300-10 AirTAC Filter Regulator NPT3/8 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: one body removes water and particulate from compressed air and holds the downstream pressure at your setpoint. This configuration is built on the 300 size with a 3/8 in NPT port, the finer 5 um filter element, a manual drain on the polycarbonate bowl, and the low-pressure (L) regulator type. A round pressure gauge scaled in MPa is fitted, a reverse/check valve is included, and the unit ships with a mounting bracket. Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. GFR filter regulators are published in 200, 300, 400 and 600 sizes with ports from 1/8 in to 1 in, thread options PT (standard), G and NPT, three drain types, 40 um or 5 um elements, gauge styles and scales, and bracket options. Flow is published as curves rather than a single rating, so we confirm sizing and any datasheet figure on request.
| Model | GFR300-10 AirTAC Filter Regulator NPT3/8 5 um Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT 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, 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. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
On an assembly fixture where pneumatic clamps must hold at a reduced setpoint, the GFR300-10 filters the supply air and regulates it in one body, while the reverse/check valve holds the clamp circuit if upstream pressure dips.
Analytical instruments and test benches are sensitive to water and fine particulate. The 5 um element polishes the air ahead of the regulator, and the manual drain lets a technician bleed accumulated moisture during daily checks.
Cylinder-driven diverters and pushers on a packaging line need clean air at a steady, moderate pressure. This unit conditions the 3/8 in branch line, and the MPa gauge gives operators a clear setpoint reference at the panel.
Match the size and port to the air your circuit actually uses: the 300 size with a 3/8 in NPT port sits mid-range in the GFR line, between the 200 and 400 units. The 5 um element (code W) suits downstream equipment that needs finer filtration than the standard 40 um grade. The manual drain (M) means an operator bleeds the bowl on a routine; automatic and differential-pressure drains are available elsewhere in the family if you prefer unattended moisture removal. The low-pressure (L) regulator type is intended for circuits set below the standard adjustment range; its exact range is not published, so confirm it with us against your setpoint before ordering.
The fitted round gauge is scaled in MPa (psi and bar scales exist as options), and the reverse/check valve (K) holds downstream pressure if supply dips. A mounting bracket is included. PT is the standard thread on this series; G and NPT are catalogue options to order as specification. Flow is published as curves, 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 G-series flow as curves, not as a single rated figure, so we do not quote a number here. Send us your air consumption, line pressure and setpoint, and we will confirm the GFR300-10 sizing from the datasheet on request before you order.
The M in the code GFR30010MLC1WTK specifies a manual drain: an operator opens the bowl drain to release collected water on a routine. The GFR family also offers automatic (A) and differential-pressure (blank, the default) drains on other configurations, so choose manual where someone is already at the machine, or specify the other types for unattended duty.
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.