The AirTAC AirTAC GFR300-15L Filter Regulator G1/2 Low-Pressure 5 um 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 differential-pressure 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 GFR300-15L is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is the 300 size with a G1/2 (BSPP) port, the low-pressure regulator type (code L) for circuits set below the standard type's range, a 5 um filter element (code W), differential-pressure drainage, a round external gauge reading in psi, and a fitted reverse (check) valve; it is supplied without a mounting bracket (code J). Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). The bowl on this 300 size is polycarbonate (PC).
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, a choice of drain (differential-pressure, automatic or manual), 40 um standard or 5 um (W) filtration, gauge scale in MPa, psi or bar, and G (BSPP) or NPT threads as order options alongside the PT standard. Flow is published as curves rather than a single rating, so ask us to confirm figures against your application before ordering.
| Model | AirTAC GFR300-15L Filter Regulator G1/2 Low-Pressure 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (G (BSPP) thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 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 | Differential-pressure 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". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 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. |
| 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) |
On a fixture-clamping circuit that holds workpieces at a reduced pressure setting, the GFR300-15L filters the incoming air to 5 um and regulates at a low setpoint, with the fitted reverse valve blocking backflow toward the supply side.
Paint and coating stations need air free of water and fine particles at a low, steady regulated pressure; this unit combines 5 um filtration with low-pressure regulation at the point of use on a 1/2 in line.
At a machine station fed by a 1/2 in drop, the unit conditions the supply air and sets a low working pressure for actuators and air tools, with the round psi gauge giving operators a local pressure reading.
Size and port: the 300 series steps up from the 200 series in port and flow capacity; match the 1/2 in G thread to your line, and confirm required flow with us, since flow is published as curves, not a single rating. Element: 40 um is the standard grade; this unit carries the finer 5 um (W) element for better protection of downstream components. Drain: differential-pressure drainage is fitted here, which bleeds the bowl as the pressure differential builds; automatic (A) and manual (M) drains are the alternatives. Gauge: the round external gauge reads in psi; an embedded square gauge and MPa or bar scales are options. Thread: G (BSPP) is specified here; PT is the standard and NPT is an order option. Bracket: this unit is supplied without a mounting bracket (code J). The low-pressure (L) regulator type's exact adjustment range is not published, so confirm it with us 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 GFR flow as curves rather than a single rated figure, so we do not quote a number. Tell us your line pressure, regulated pressure and air consumption, and we will confirm sizing from the datasheet on request.
The L code marks the low-pressure regulator type, intended for settings below the standard type's range. The exact adjustment range for this variant is not published, so we confirm it on request. The rest of the decode is standard: 1.0 MPa (145 psi) maximum inlet, -5 to 70 C operation, 5 um element, differential-pressure drain, round psi gauge and a fitted reverse valve.
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.