The AirTAC GFR300-15 G1/2 AirTAC Filter Regulator 5 um Manual 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 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 GFR300-15 is an AirTAC GFR300 filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This configuration carries a G1/2 (BSPP) port, a 5 um filter element (the finer of the two catalogue grades), a manual drain on the PC bowl, an embedded square gauge reading in psi, a built-in reverse/check valve, and a mounting bracket. The standard regulator covers 0.05-0.9 MPa (7-130 psi) with this manual-drain version, and the unit is rated for a maximum inlet pressure of 1.0 MPa (145 psi) at -5 to 70 C (non-freezing).
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch and choices of drain type, 40 um or 5 um filtration, gauge scale, thread (PT standard; G and NPT as order options) and bracket. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300-15 G1/2 AirTAC Filter Regulator 5 um Manual Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (G (BSPP) thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, 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 0.05 - 0.9 MPa (7 - 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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. |
| G | G (BSPP) 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) |
Clean, regulated air for the pneumatic cylinders that index, push and stop bottles on a filling or packaging conveyor, with the 5 um element protecting valve spools from water and debris.
Set-and-hold clamping pressure for workpiece fixtures on CNC or manual machine tools, where the regulator holds a stable clamp force and the check valve helps hold the circuit if upstream pressure dips.
Oil-free, filtered and regulated supply for air-driven lab apparatus or spray guns in a finishing booth, where a filter regulator (with no lubricator) keeps oil mist out of the process.
Step up or down through the GFR sizes (200/300/400/600) to match the port and flow path your line needs; this 300 size with a G1/2 port suits 1/2-inch air mains. Choose the drain to match maintenance habits: manual (as here) drains on demand, automatic drains continuously, and the differential-pressure default drains on a pressure drop. Pick 5 um (this unit) when downstream equipment needs finer filtration than the 40 um standard, and set the gauge scale to MPa, psi or bar - this one reads psi. Thread is PT as standard with G (BSPP) and NPT as order options; a bracket is included here.
Flow for this series is published as curves, not a single rated figure, so we cannot quote one number honestly. Send us your application details and we will confirm sizing and the datasheet figures 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 GFR series as curves rather than a single rated figure, so we do not quote one number. Tell us your application and we will confirm the datasheet flow figures and sizing for you before you order.
This unit has a manual drain: an operator opens it to expel collected water and dirt from the PC bowl. Choose manual where the unit is checked as part of a routine, or pick an automatic or differential-pressure drain version if you want drainage without operator attention. Note that with a manual drain the regulation range is 0.05-0.9 MPa (7-130 psi).
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.