The AirTAC AirTAC GFR300-15 Filter Regulator 1/2 in NPT, 5 um 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 PT1/2" 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 GFR300-15 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built with a 1/2 in NPT port, a 5 um filtration element (the finer of the two published grades), a manual drain on the bowl, and the low-pressure regulator type for circuits that run below standard regulated pressures. It ships as coded with a square embedded gauge scaled in bar, a reverse/check valve fitted, and a mounting bracket included.
This is a genuine AirTAC part in the GFR300 size, which spans the G-series 200/300/400/600 range with port options from 1/8 in to 1 in and PT, G or NPT threads. Flow figures for this series are published as curves rather than a single rating, so ask us and we will confirm the datasheet figures against your application on request.
| Model | AirTAC GFR300-15 Filter Regulator 1/2 in NPT, 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (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 — square, bar 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. |
|---|---|
| 15 | Port size PT1/2". 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). |
| F | Gauge shape: Square. C is round, F is square. |
| 3 | Gauge scale: bar. 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 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Feeding the air cylinders on a carton-forming or wrapping machine, where the filter-regulator cleans the shop air and holds a steady, lower-than-standard working pressure to the actuators on the line.
Supplying pneumatic clamps and swing cylinders on a machining fixture that must be held at a reduced setting; the 5 um element protects the valve stack and the check valve holds the circuit against upstream loss.
Conditioning the air feed to a bench-mounted test rig or pilot-scale process skid, where fine 5 um filtration, a bar-scaled gauge and manual condensate draining suit intermittent, supervised operation.
Choose the size and port step against the air demand of the circuit: the 300 size with a 1/2 in NPT port sits mid-range in the G-series, and the larger the size the greater the port and flow capacity. This unit carries the W code, so it is fitted with the 5 um element; if your application only needs general protection, the 40 um standard grade is the alternative. Drain choice matters: this unit has a manual drain, which you bleed by hand, whereas automatic and differential-pressure drains discharge condensate without attention. The gauge here is the embedded square type scaled in bar; MPa and psi scales and an external round gauge are the other published options. Thread is NPT on this unit; PT (standard) and G are order options. Note this is the low-pressure regulator type: its exact regulation range is not published in the material we hold, so confirm it with us before ordering. Flow is published as curves, not a single rating, so ask us to confirm sizing against your application before you order.
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 G-series as performance curves rather than a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the datasheet curve figures for the GFR300 at 1/2 in NPT on request, so you can size it properly before ordering.
The M code means the bowl is drained by hand: you bleed accumulated condensate manually, which suits supervised installations; automatic and differential-pressure drains are the published alternatives if you cannot attend the unit. The L code marks the low-pressure regulator type, intended for circuits running below standard regulated pressures; its exact regulation range is not published in our material, so confirm it with us before ordering.
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.