The AirTAC GFR300-15LC2G AirTAC Filter Regulator G1/2 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 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 GFR300-15LC2G is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation in a single body. This configuration carries a G1/2 (BSPP) port, the low-pressure regulator type, a 40 um standard filter element, and a differential-pressure drain that bleeds condensate automatically whenever the pressure differential across the element rises. The polycarbonate bowl lets you see the condensate level at a glance, a round external gauge on the psi scale is fitted for setpoint reading, and the mounting bracket is included. No reverse/check valve is fitted.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with a choice of PT, G or NPT thread, manual, automatic or differential-pressure drain, 40 um or 5 um (W) filtration, gauge style and scale, and a low-pressure regulator type. Flow figures are published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR300-15LC2G AirTAC Filter Regulator G1/2 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (G (BSPP) thread) |
| Filtering grade | 40 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 | Not fitted |
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. |
| (blank) | Mounting bracket included. |
| (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. |
| G | G (BSPP) thread. PT is the default; G is BSPP and T is NPT. |
| (blank) | No reverse-flow valve (the default). |
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) |
Fixture clamps that hold workpieces during milling or drilling often run at reduced line pressure. A low-pressure filter regulator at the fixture drop cleans the supply and holds the clamp circuit at the setpoint, with the psi gauge giving the operator a direct read.
Stopper, pusher and gate cylinders on a packaging conveyor need clean, dry air at a steady reduced pressure to avoid jarring product. A filter regulator at the conveyor manifold handles both jobs in one body, and the differential-pressure drain keeps condensate off the valves.
Fill-block and diverter valve actuators on a bottling line are sensitive to pressure drift. Feeding them through a low-pressure filter regulator stabilises the actuation pressure while the 40 um element screens scale and pipe debris away from the valve seats.
Start with the port step: size 300 in 1/2 in covers mid-range supply lines, and the next size up or down moves you to a different flow band - since flow is published as curves rather than a single rating, send us your air demand and we will confirm the right size before you order. Choose the drain to match maintenance reality: differential-pressure (this unit) drains automatically on pressure drop, automatic (A) drains on a timed/floating basis, and manual (M) needs someone to open the drain. Filter grade is 40 um standard here; specify W for 5 um where finer particle capture matters. Gauge style and scale are selectable (square embedded or round external; MPa, psi or bar - this unit ships with a round psi gauge). Thread is G (BSPP) on this code; PT is the standard and NPT is an order option. The bracket is included; J codes omit it.
Note that this is the L (low-pressure) regulator type; its exact regulation range is not published in the catalogue, so confirm the setpoint band with us before ordering.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back 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 number, so we do not quote a l/min or SCFM figure. Send us your line pressure, setpoint and air consumption and we will confirm the sizing against the datasheet curves on request before you order.
L marks the low-pressure regulator type, intended for setpoints below the standard band; its exact regulation range is not published, so confirm it with us on request. The drain is differential-pressure: condensate is discharged automatically whenever the pressure drop across the 40 um element builds up, with no manual draining needed.
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.