The AirTAC GFR300-15 AirTAC Filter Regulator PT1/2 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 AirTAC GFR300-15 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 fitted with a PT1/2 port, a 5 um filter element for finer filtration than the standard 40 um grade, a manual drain for the polycarbonate bowl, and a built-in check valve that holds downstream pressure when the supply is removed. The external round gauge reads in psi, and the standard regulator covers an adjustment range of 0.05-0.9 MPa (7-130 psi). Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with a choice of drain type, filter grade, gauge style and scale, thread option and bracket. Flow is published as curves rather than a single rating, so we confirm the datasheet and sizing figures on request before you order.
| Model | GFR300-15 AirTAC Filter Regulator PT1/2 5 um Manual Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (PT 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 — 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 0.05 - 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. |
| J | Supplied without bracket. |
| (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. |
| (blank) | PT 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) |
Feeding a bench-mounted pneumatic press or clamping fixture: the 5 um element protects the directional valve and cylinder seals from particulate and condensed water, while the regulator holds a steady working pressure and the check valve keeps the circuit pressurised during brief supply interruptions.
Conditioning the air feeding conveyor diverters, baggers and carton-sealing cylinders on a packaging line. The PT1/2 port suits a main drop leg, the psi gauge lets operators set and verify line pressure at a glance, and the manual drain is emptied during scheduled line cleaning.
An inlet conditioning stage for OEM control panels and valve manifolds on custom machinery. The filter regulator gives the builder one component instead of two, the 5 um grade suits sensitive pilot-operated valves, and the check valve prevents backfeed through the unit from downstream circuits.
Size and port step up with required flow: this 300-size unit carries a PT1/2 port. Because flow is published as curves rather than a single rating, ask us to confirm sizing against your application before ordering. This configuration has a manual drain, which suits installations where someone can bleed the bowl as part of routine checks; automatic or differential-pressure drains are available if the unit will be left unattended. The 5 um element (code W) is the finer option versus the standard 40 um grade - choose it where downstream valves and cylinders need cleaner air. The round gauge reads in psi; square embedded gauges and MPa/bar scales are alternatives. Thread is PT as standard, with G and NPT available as order options, and this unit is supplied without a mounting bracket (bracket available).
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 figure, so we do not quote a number here. Contact us with your application details and we will confirm the datasheet and the flow curve for the GFR300 at PT1/2 so you can size the unit correctly before ordering.
The M in the code means the polycarbonate bowl is emptied by hand rather than automatically. A manual drain suits installations that receive routine attention, such as a machine serviced each shift. If the unit will sit unattended, ask about the automatic or differential-pressure drain versions of the same GFR300 size.
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.