The AirTAC GFR300-15 AirTAC 1/2 in Filter Regulator, 5 um, Auto Drain 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 automatic 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 GFR300-15 is a size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration has a PT1/2 (1/2 in) port, an automatic drain that ejects collected condensate without manual attention, a 5 um filter element for finer filtration than the standard 40 um grade, and an embedded square gauge reading in psi. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi), and the unit carries no mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi), with an operating temperature of -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family is offered in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um filtration, and G or NPT thread options alongside the PT standard. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR300-15 AirTAC 1/2 in Filter Regulator, 5 um, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (PT 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, psi 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. 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". |
| A | Drain: Automatic 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. 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. |
| (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) |
Feeding spray guns and air-assisted applicators on a finishing line, where the 5 um element helps keep water and fine particulate out of the finish and the regulator holds a steady gun pressure.
Conditioning the shop-air feed to a machining centre's clamps, tool-change cylinders and air-blast circuits, with the automatic drain clearing condensate during unattended shifts.
Supplying regulated air to conveyor diverters, pushers and bag-forming cylinders on a packaging line, where stable pressure keeps cycle timing consistent.
Step up or down through the GFR sizes (200/300/400/600) and their port sizes (1/8 to 1 in) according to the flow your line needs - the 300 size with a 1/2 in port sits mid-range. Choose the drain to suit access: automatic (this model) for unattended condensate removal, manual where you prefer controlled bleeding, or the differential-pressure default. Pick 40 um for general protection or 5 um (code W, as here) when downstream components need finer air. Gauge scale is selectable (MPa, psi or bar); this unit ships with the embedded square gauge in psi. Thread is PT as standard, with G (BSPP) and NPT available to order, and a mounting bracket is optional (not fitted here).
Because flow is published as curves rather than one rated number, we cannot quote a single flow figure for this unit - send us your application details and we will confirm sizing against the datasheet before you order.
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 G-series flow as curves rather than a single rated figure, so we do not quote one number. Tell us your inlet pressure and the flow your application needs, and we will confirm the sizing against the datasheet on request before you order.
The automatic drain on this GFR300-15 ejects collected condensate by itself, which suits installations that run unattended or are awkward to reach. The GFR family is also available with a manual drain or the differential-pressure default - just pick the corresponding code when 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.