The AirTAC GFR30015LF3WT AirTAC Filter Regulator NPT1/2 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 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 GFR30015LF3WT is a GFR-series filter regulator: water and particulate filtration and pressure regulation combined in one body, with no lubricator. This size-300 unit is specified with 1/2 in NPT ports, the fine 5 um filter element (code W instead of the standard 40 um), a differential-pressure drain that bleeds collected condensate automatically as flow passes through, and the embedded square gauge scaled in bar. It is the low-pressure (L) type, so the regulated output is intended for circuits that run below the standard regulator band - the exact adjustment range for this variant is not published, and we confirm it on request. Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family is offered in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, standard or low-pressure regulation, square (MPa/psi/bar) or optional external round gauges, bracket or no bracket, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm flow and datasheet details for your application before ordering.
| Model | GFR30015LF3WT AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT 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 — square, bar 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). |
| F | Gauge shape: Square. C is round, F is square. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Fixture clamps and swing cylinders on a CNC cell that are specified to close at a reduced, closely held pressure, fed from a 1/2 in main - the fine 5 um element protects the clamp valves from water and swarf-carrying particulate.
Bench test rigs and pilot-scale process rigs running instrument-grade air at low regulated pressure, where the 5 um element, bar-scaled square gauge and self-draining bowl keep the supply clean and visible without daily bowl blowing.
Sorter and carton-sealer cylinders on a packaging line fed from a 1/2 in drop, where the filter regulator conditions the air and holds the reduced working pressure the cylinder valves were specified for.
Size and port step with required flow: 300 sits in the middle of the GFR range, and the 1/2 in NPT port here (06=1/8, 08=1/4, 10=3/8, 15=1/2, 20=3/4, 25=1) should match the air line feeding the circuit. Choose the drain to suit maintenance access: differential-pressure (this unit) drains itself in service, automatic (A) dumps condensate each cycle, and manual (M) needs someone to open the bowl. Pick the 5 um element (W) where downstream valves, gauges or instruments need finer air than the standard 40 um. The L code makes this the low-pressure regulator variant - confirm its adjustment band with us, since it is not published. Gauge scale is bar here; MPa and psi scales and an external round gauge are alternatives. Threads come as PT (standard), G or NPT, and a bracket is included on this code (J would omit it).
One honest note on sizing: AirTAC publishes flow for these units as curves, not as a single rated number, so we do not quote a flow figure here. Send us your application details and we will confirm the sizing against the datasheet curves 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, not as a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Send us your line size and application and we will confirm the flow from the datasheet curves before you order.
L is the low-pressure regulator type, intended for circuits regulated below the standard band - its exact adjustment range is not published, so confirm it with us. W is the fine 5 um filter element instead of the standard 40 um. With no A or M in the code, this unit has the differential-pressure drain: condensate collected in the PC bowl is discharged automatically as air flows through, with no manual draining required.
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.