The AirTAC GFR300-15 AirTAC Filter Regulator PT1/2 Low-Pressure is a genuine G-series filter regulator: water separation, 40 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 1/2 in PT ports, a 40 um standard filter element and a manual drain, so condensate is released only when an operator opens the drain - a good fit where automatic draining is not wanted. The regulator is the low-pressure type, and the unit carries a round gauge reading in psi plus a reverse/check valve to hold downstream pressure if the supply drops. No mounting bracket is included in this configuration.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of manual, automatic or differential-pressure drains, 40 um or 5 um (W) filtration, gauge styles and scales, PT, G or NPT threads, and bracket options. Flow is published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR300-15 AirTAC Filter Regulator PT1/2 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 130 psi) |
| Pressure type | Low-pressure 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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)). |
| L | Low-pressure 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. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Feeds filtered, regulated air to a carton-forming and sealing line, with the manual drain emptied during scheduled changeover and the check valve holding actuator pressure through brief supply dips.
Supplies a fixture-clamping manifold that runs at reduced set pressure, where the low-pressure regulator type and round psi gauge let operators read and hold the clamping setting directly.
Conditions the air feeding blow-off nozzles along a food-packaging conveyor, removing water and particulate at 40 um so the nozzles stay clear and the manual drain is bled at end-of-shift.
Start with size and port: the 300 size with 1/2 in PT ports suits lines running larger volumes than 1/4 in or 3/8 in drops, but sizing should follow the flow your circuit needs. Choose the drain to match maintenance habits - manual (this unit) needs an operator, automatic drains on their own, and differential-pressure drains purge on pressure drop. Pick 40 um for general air preparation or 5 um (code W) where finer particulate removal matters. Gauge style and scale are decodable: this unit has a round gauge in psi; embedded square gauges and MPa or bar scales are also available. Thread is PT as standard, with G (BSPP) and NPT as order options, and brackets can be added or omitted (omitted here). The low-pressure regulator type suits circuits set well below standard ranges - the exact range for this type is not published, so confirm it with us. Because flow is published as curves rather than a single rating, ask us to confirm sizing 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 performance curves, not as a single rated figure, so we do not quote a number. Tell us your line conditions and required flow and we will confirm the datasheet curve figures for this 300-size, 1/2 in PT unit on request.
The M in the code selects a manual drain: condensate collected in the PC bowl is released only when the drain is opened, which suits stations bled on a fixed schedule. Automatic (A) and differential-pressure (default, blank) drains are available as decodable options on GFR units if you prefer unattended purging.
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.