The AirTAC GFR300-15 AirTAC Filter Regulator PT1/2, 5 um, Low-Pressure 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: water and particulate removal plus downstream pressure regulation combined in a single body. This configuration is the 300 size with a PT1/2 port, a 5 um filter element, a manual drain, the low-pressure regulator type, an embedded square gauge reading in psi, a reverse (check) valve fitted, and a mounting bracket included.
It is a genuine AirTAC part rated to a maximum inlet pressure of 1.0 MPa (145 psi) and an operating temperature of -5 to 70 C (non-freezing). The GFR line spans sizes 200 to 600 with ports from 1/8 to 1 inch, drain choices (differential-pressure, automatic or manual), 40 um or 5 um elements, gauge scales in MPa, psi or bar, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm figures for your application.
| Model | GFR300-15 AirTAC Filter Regulator PT1/2, 5 um, Low-Pressure |
|---|---|
| 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 | 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 — 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. 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. |
| (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. |
| 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) |
Filtering and regulating supply air to clamping cylinders on an assembly press, with the built-in check valve blocking reverse flow back toward the upstream side.
Conditioning air at spray booths on a coating line, where the 5 um element catches fine particulate before it reaches the guns and the regulator holds the set line pressure.
Supplying filtered, regulated air to diverters and stoppers on a packaging conveyor, with the psi gauge readable at a glance and manual drain suiting a line with scheduled shutdown checks.
Size and port set the flow path: the 300 size with a PT1/2 port suits lines plumbed at 1/2 inch; step up or down a size if your demand changes. Drain choice matters - this unit has a manual drain, so an operator drains the bowl; choose automatic or differential-pressure drain if unattended draining is preferred. The 5 um element (code W) is the finer option against the 40 um standard. The square gauge reads psi; MPa and bar scales are available, and an external round gauge is optional. Thread is PT as standard, with G (BSPP) and NPT as order options; a bracket is included.
The low-pressure regulator type serves circuits regulated below the standard range; the exact adjustment range for this type is not published, so confirm it with us. Flow is published as curves, not 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 curves rather than a single rated figure, so we do not quote a number here. Tell us your operating pressure and demand, and we will confirm the flow from the datasheet for this exact model before you order.
Manual drain means an operator opens the drain at the bowl to release collected water - simple and reliable where the unit is checked routinely. The GFR series is also available with automatic or differential-pressure drain for unattended operation; tell us your preference and we will quote the matching code.
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.