The AirTAC GFR30015LF3WTK AirTAC Filter Regulator NPT1/2 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 GFR30015LF3WTK is a size-300 filter regulator that cleans compressed air and holds a set downstream pressure in one body. This configuration is the low-pressure type, so it suits circuits that run at reduced pressure rather than full line pressure. The 5 um filter element (code W) removes water and particulate finer than the standard 40 um grade, the differential-pressure drain bleeds collected condensate automatically as flow passes through, and the embedded square gauge reads in bar so the setting is visible at the unit. A reverse/check valve is fitted to hold the downstream setting if upstream supply is interrupted, and the 1/2 in NPT port suits larger supply lines.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, square or round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR30015LF3WTK AirTAC Filter Regulator NPT1/2 |
|---|---|
| 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 | 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. |
| (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. |
| 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) |
Clamp cylinders on fixture plates often run at reduced pressure to avoid deforming delicate workpieces. This low-pressure type filter regulator sets that reduced clamp pressure, the 5 um element protects the valve and cylinder seals, and the check valve holds the clamp setting if the main supply dips.
Packaging machines with many small cylinders need clean, steady air at a moderate setting. The size-300 body with 1/2 in NPT port feeds the machine's main air drop, the square bar gauge lets operators verify the setting at a glance, and the differential-pressure drain handles condensate during continuous running.
Test rigs and analytical instruments are sensitive to both particles and pressure drift. The 5 um filtration keeps fine contamination out of precision components, the regulator holds a stable low-pressure supply, and the bar-scaled gauge documents the set point during test runs.
Start with the port and size: this unit is size 300 with a 1/2 in NPT port, one step up from the 3/8 in size-300 option, so match it to the supply line and the flow your circuit needs. Choose the drain type - the differential-pressure drain fitted here works automatically in flowing systems, while automatic and manual drains are available as alternatives. This example carries the 5 um element (W) instead of the 40 um standard, which is the right call where finer particulate matters. The gauge here is the embedded square type reading in bar; external round gauges and MPa or psi scales are order options, and PT, G or NPT threads can be specified. A mounting bracket is included.
One honest note on sizing: AirTAC publishes flow for this family as curves, not a single rated figure, so we cannot quote a rated flow number. Send us your application details and we will confirm the sizing against the datasheet before you order.
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 flow for the GFR family as curves, not as a single rated number, so we do not quote a rated flow figure. Tell us your line pressure, set pressure and the air demand of your equipment, and we will confirm the sizing against the datasheet on request before you order.
The K in the code means a reverse/check valve is fitted, which holds the downstream pressure setting if the upstream supply is interrupted. The W means the 5 um filter element is fitted instead of the 40 um standard grade, giving finer removal of water and particulate. Both are decodable choices, and units without them are available in the same size.
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.