The AirTAC GFR300-10 AirTAC Filter Regulator PT3/8, 5 um, Manual 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: it removes water and particulate from compressed air and regulates downstream pressure in a single compact body. This size 300 unit is fitted with a 3/8 in PT port, the fine 5 um filter element (code W), a manual drain for the polycarbonate bowl, and a low-pressure regulator type. A round external gauge scaled in psi is fitted, and a reverse (check) valve is built in, so downstream pressure is held 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. As a low-pressure type, its exact adjustment range is not published in the standard tables - ask us to confirm it against your setpoint.
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 manual, automatic or differential-pressure drains, 40 um standard or 5 um fine filtration, gauge and scale options, and PT, G (BSPP) or NPT threads. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures on request before you order.
| Model | GFR300-10 AirTAC Filter Regulator PT3/8, 5 um, Manual |
|---|---|
| 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 | 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. |
| 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) |
Point-of-use conditioning ahead of lab analysers and sample-handling panels: the 5 um element and fine regulation protect sensitive pneumatic metering components, with the psi gauge giving operators a direct local reading.
Feeding fixture clamps and pallet-docking cylinders that must not see full line pressure: the low-pressure regulator type holds a gentle setpoint, and the check valve keeps the clamp circuit pressurised if the main supply drops.
A conditioning stage inside a machine control cabinet, filtering and regulating air before it reaches pilot valves and I/P modules, with the manual drain serviced during scheduled maintenance rounds.
Start with the port step: this unit is size 300 with a 3/8 in PT port - step up to size 400 or 600 if your line runs larger ports or higher demand, or down to size 200 for compact circuits. This configuration carries the 5 um fine element (code W) instead of the 40 um standard, which suits air going to precision valves, gauges or instrumentation; choose 40 um for general shop-air protection. The manual drain means an operator opens the bowl drain periodically - pick the automatic or differential-pressure drain variant if the unit is mounted in a hard-to-reach spot. The round gauge is scaled in psi; MPa and bar scales are available, and an embedded square gauge is the standard alternative. Thread is PT as standard, with G (BSPP) and NPT as order options, and a mounting bracket is included. Because flow is published as curves rather than one rated number, 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, not as a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the flow figures from the datasheet and check the sizing against your demand before you order.
This is the low-pressure regulator type (code L), and its exact adjustment range is not published in the standard tables - we will confirm it on request against your setpoint. The fitted reverse (check) valve (code K) holds downstream pressure if the upstream supply is interrupted, which matters for clamping and holding circuits.
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.