The AirTAC GFR300-15T AirTAC Filter Regulator NPT1/2 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 holds downstream pressure steady in a single 300-size body with a 1/2 in NPT port. This configuration carries the 5 um element (code W) for finer filtration than the standard 40 um grade, a differential-pressure drain that bleeds accumulated condensate automatically as pressure drop across the element builds, an external round gauge reading in psi, and a built-in reverse (check) valve that holds downstream pressure when the supply is cut. The standard regulator adjusts from 0.15 to 0.9 MPa (20-130 psi), and the polycarbonate bowl suits the 300 size.
This is a genuine AirTAC part. The GFR series is offered in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, thread options PT (standard), G and NPT, drain choices, 40 um or 5 um filtration, gauge styles and scales, and an optional reverse valve. Flow is published as curves rather than a single rating, so we confirm the datasheet figures for your application on request.
| Model | GFR300-15T AirTAC Filter Regulator NPT1/2 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 | 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 | Differential-pressure 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 0.15 - 0.9 MPa (20 - 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. |
|---|---|
| 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)). |
| (blank) | Standard 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. |
| 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) |
Mounted at the drop to a machining centre, the unit dries and cleans the supply at 5 um, holds a steady regulated pressure to the tool changers and clamps, and the check valve keeps the circuit pressurised during a main-air interruption.
Feeding the directional valves and cylinders on a carton-forming and sealing line, the regulator holds consistent actuation pressure while the 5 um element keeps fine debris out of valve spools, and the psi gauge gives operators a set point they can read at a glance.
On the air feed to a finishing booth, the 5 um grade filters water and particulate ahead of spray equipment, the regulator holds the atomising pressure steady, and the differential-pressure drain clears condensate without a manual walk-round.
Start with the port step: this unit is size 300 with a 1/2 in NPT port, and the size you pick sets both the connection and the flow capacity, so match it against your line's air demand. Choose the drain: differential-pressure (this unit) drains as the element loads, automatic drains on a cycle, and manual suits points where someone walks past regularly. Pick the filter grade: 40 um is the standard element, 5 um (this unit, code W) protects finer downstream equipment. Then set the gauge style and scale (this unit: external round, psi), decide whether a reverse valve is needed to hold downstream pressure, and confirm the thread: PT is the catalogue standard, with G and NPT as order options; a bracket is included.
One honest note on sizing: AirTAC publishes flow as curves, not a single rated figure, so ask us to confirm the flow data for this exact model 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 number, so there is no one figure we can quote honestly. Tell us your application and we will confirm the flow data from the datasheet for this exact model on request.
The W in the code selects the optional 5 um filter element instead of the 40 um standard, which suits finer downstream equipment, and the K selects a built-in reverse (check) valve that holds downstream pressure when the upstream supply is shut off. Both are catalogue options you can order with or without on any GFR unit.
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.