The AirTAC GFR300-15LF2WT 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 GFR300-15LF2WT is an AirTAC GFR-series filter regulator: filtration and pressure regulation combined in a single body. It removes water and particulate from compressed air and holds a set downstream pressure, with no lubricator in this family. This size 300 unit is decodes as a 1/2 inch NPT port, the low-pressure regulator type, a 5 um filter element (code W, versus the 40 um standard), a differential-pressure drain on the bowl, and a fitted square gauge scaled in psi. The polycarbonate bowl lets you see accumulated condensate, and the differential-pressure drain bleeds it off automatically as flow passes through, so no manual draining routine is needed. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with 1/8 to 1 inch ports, a choice of 40 um or 5 um filtration, differential-pressure, automatic or manual drains, standard or low-pressure regulation, square or round gauges in MPa, psi or bar scales, and G, NPT or PT threads. Flow for this family is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR300-15LF2WT 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, 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). |
| 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. |
| 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) |
On a machine frame where clamp cylinders and hold-down fixtures run at a lower, tightly held pressure than the main supply, a low-pressure filter regulator at the drop keeps the circuit filtered and regulated from one 1/2 inch NPT connection.
Feeding wrapper seal bars, case erectors and carton closers on a packaging line: the 5 um element protects directional valves and cylinders from fine dirt, the differential-pressure drain handles condensate without operator rounds, and the psi gauge gives the line technician a visible setpoint.
Supplying positioners, air-operated control valves and panel-mounted devices that require clean air at a stable low pressure: one body does the filtering and the regulating, with the square psi gauge mounted for at-a-glance verification during shift checks.
Start with the port step: this unit is size 300 with a 1/2 inch NPT thread. If your line runs larger volumes of air, step up to size 400 or 600; for compact circuits, size 200 covers 1/8 and 1/4 inch ports. Because published flow is given as curves and not a single rating, ask us to confirm sizing against your actual air demand before ordering. This configuration carries the low-pressure regulator type, so if your setpoint sits in a lower band than a standard unit handles comfortably, this is the right variant; we will confirm the exact adjustment range from the datasheet on request.
Other decodable choices: the 5 um element (code W) suits finer particulate protection downstream of the unit, while the 40 um standard element suits general-purpose water and dirt removal; the differential-pressure drain here needs no attention, but automatic and manual drains are orderable alternatives; the fitted square gauge reads in psi, with MPa or bar scales and an external round gauge available; PT is the standard thread and G or NPT are order options - this unit is specified with NPT; a mounting bracket is included.
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 family as curves, not as a single rated number, so we do not quote a rated flow figure here. Tell us your application and required air demand and we will confirm the datasheet flow figures and check the sizing for you on request.
The W in the code GFR300-15LF2WT selects the 5 um filter element, one step finer than the 40 um standard, for better protection of downstream valves and instruments. The blank drain position selects the differential-pressure drain, which bleeds condensate off automatically as air flows through, so there is no manual drain routine; automatic and manual drains are available as order alternatives.
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.