The AirTAC GFR300-15 AirTAC Filter Regulator 1/2 PT, 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 filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady, in one compact body. This configuration is a PT1/2 (1/2 in) unit with a 5 um filter element, an automatic drain that ejects collected condensate without manual attention, and a fitted square gauge reading in psi. The standard regulator covers 0.15-0.9 MPa (20-130 psi), the polycarbonate bowl suits non-freezing compressed-air service from -5 to 70 C, and maximum inlet pressure is 1.0 MPa (145 psi).
This is a genuine AirTAC part from the GFR300 series, one of four sizes (200/300/400/600) spanning 1/8 in to 1 in ports, with automatic, manual or differential-pressure drains, 40 um or 5 um filtration, and MPa, psi or bar gauge scales. Flow is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR300-15 AirTAC Filter Regulator 1/2 PT, 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. |
| (blank) | Mounting bracket included. |
| (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) |
Conditions and regulates the air feeding a workshop press or clamping fixture, keeping water and swarf out of the cylinder while holding a steady working pressure stroke after stroke.
Supplies cleaned, regulated air to diverters, pushers and gripper cylinders on a carton or case packaging conveyor, where a 1/2 in supply serves several valves on one drop.
Point-of-use conditioning for pick-and-place modules and test-rig actuators, where the 5 um element and automatic drain protect sensitive components without daily draining rounds.
Choose the size and port against the flow your line needs - here a 1/2 in PT thread - and step up a size when demand is high; because flow is published as curves, not a single rating, let us confirm the fit against your application before you order. Pick the drain to match maintenance access: automatic (this unit) suits unmanned or hard-to-reach installations, manual suits attended stations, and differential-pressure drain is the catalogue default. The 5 um element (code W) is the finer choice over the 40 um standard where downstream valves and cylinders need cleaner air. The fitted square gauge reads psi; MPa or bar scales and an external round gauge are options. PT is the standard thread, with G (BSPP) and NPT available to order, and a mounting bracket is included.
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 curves rather than a single rated figure, so we do not quote a number here. Send us your air demand and line details and we will confirm the sizing and the relevant datasheet figures on request before you order.
The automatic drain ejects collected condensate on its own, which suits unmanned or hard-to-reach installations. Manual and differential-pressure drains are catalogue alternatives. With the automatic drain fitted, the regulator adjustment range is 0.15-0.9 MPa (20-130 psi), read on the fitted square psi gauge.
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.