The AirTAC AirTAC GFR300-15G Filter Regulator G1/2, psi Gauge 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 automatic 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.
This GFR300-15G is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and holds downstream pressure, in one body. This configuration is the 300 size with a G1/2 (BSPP) port on G thread, the low-pressure regulator type, an automatic drain that bleeds condensate from the PC (polycarbonate) bowl without manual attention, and the standard 40 um filter element. An external round gauge scaled in psi is fitted; no mounting bracket and no reverse/check valve are included.
It is a genuine AirTAC part. The GFR family spans sizes 200 to 600 with ports from 1/8 to 1 in, a choice of automatic, manual or differential-pressure drains, 40 um standard or 5 um (code W) elements, and gauge and thread options to order. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm sizing figures from the datasheet for your application.
| Model | AirTAC GFR300-15G Filter Regulator G1/2, psi Gauge |
|---|---|
| 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 | Automatic 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". |
| A | Drain: Automatic 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. |
| (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) |
On a packaging line, adhesive applicators need air that is clean and held at a gentle, steady pressure. This unit filters the supply, regulates it in the low-pressure band the glue heads are set up for, and its automatic drain keeps condensate out of the circuit without an operator visiting the bowl.
Bench-top analytical and testing instruments fed from a shop-air ring main need particulate and water removed before the air reaches sensitive pneumatic internals. This filter regulator conditions the drop at the bench, and the psi-scaled round gauge lets staff read and reset the supply pressure at a glance.
Stopper and gate cylinders along a filling-line conveyor run best on filtered air regulated to a modest, stable pressure so products are clamped firmly but not crushed. This unit conditions the conveyor's air take-off, with the automatic drain handling moisture collected across the shift.
The real choices on this family are the size and port step, the drain, the element grade and the fittings. Step up from the 300 size when the line's flow demand outgrows the 1/2 in port, or down to 200 for compact drop points. Drains: automatic (this unit) for unattended condensate removal, manual where an operator checks the bowl, or differential-pressure as the catalogue default. Element: 40 um standard, 5 um (code W) where finer filtration is wanted. Gauges: embedded square as standard or external round, scaled in MPa, psi or bar; thread is PT as standard with G and NPT as order options; a mounting bracket is optional. Because flow is published as curves rather than a single rated figure, send us your flow and pressure targets and we will confirm the correct size from the datasheet before you order.
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 rather than a single rated figure, so we do not quote a number here. Tell us your flow and pressure targets and we will confirm the correct size from the datasheet before you order.
The L in the code marks the low-pressure regulator type, intended for circuits regulated well below standard line pressure. The exact adjustment range for this variant is not published in the sheet we transcribe, so we confirm it on request; the unit's maximum inlet pressure is 1.0 MPa (145 psi).
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.