The AirTAC GFR300-15T AirTAC 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 differential-pressure drain and regulates 0.15 - 0.9 MPa (20 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR300-15T is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 300-size unit is ordered with a 1/2 in NPT port, the low-pressure regulator type, a fine 5 um filter element (code W), and the differential-pressure drain, which bleeds accumulated condensate automatically whenever the pressure differential across the element is high enough - no daily manual draining. The embedded square pressure gauge is fitted with an MPa scale, and the J code means no mounting bracket is supplied.
This is a genuine AirTAC part from the GFR300 series, one of four sizes (200/300/400/600) with port options from 1/8 in to 1 in and PT, G or NPT threads. 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 rated figure, so ask us to confirm the datasheet and sizing for your application.
| Model | GFR300-15T AirTAC Filter Regulator 1/2 in NPT, 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, MPa 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. |
|---|---|
| 15 | Port size PT1/2". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. 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. |
| (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 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Cleaning and regulating the shop-air feed to a machining centre's pneumatic tool-changer and clamping circuits, where the 5 um element protects spool valves from chips of scale and pipe rust carried in the supply line.
Conditioning the air feeding bagger and cartoner cylinders on a packaging line, combining water and particle removal with a stable, reduced pressure so seal-bar and pusher actuators repeat consistently through the shift.
Supplying filtered, regulated air to benchtop analytical and test instruments in a laboratory, where the fine 5 um grade and a low set pressure keep sensitive pneumatic dosing and switching components clean and steady.
Size and port set the capacity: the 300 frame with a 1/2 in NPT port suits lines where moderate-to-high air demand meets a compact envelope, but because flow is published as curves rather than one rated number, let us check the curve against your consumption before you order. This unit is the low-pressure (L) type, so choose it where the working pressure sits below the standard regulator's range; the exact adjustment range for the low-pressure version is not published and we will confirm it on request. The 5 um element (W) is the finer of the two grades (40 um is standard) - pick it for downstream valves, cylinders and instruments that tolerate less particulate. The differential-pressure drain is fitted here; an automatic or manual drain can be ordered instead. The square gauge reads in MPa (psi and bar scales are options), and the T suffix specifies NPT thread - PT is the catalogue standard, with G (BSPP) also available. No mounting bracket is included with this code.
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 this series as performance curves, not as a single rated number, so we do not quote a figure here. Tell us your line pressure and air consumption and we will confirm the curve and datasheet figures for the GFR300-15T on request before you order.
W is the filter grade: this unit carries the optional 5 um element instead of the 40 um standard. L is the regulator type: a low-pressure version rather than the standard regulator, intended for lower working pressures. The exact adjustment range of the low-pressure type is not published in the catalogue data we hold, so ask us to confirm it on request.
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.