The AirTAC GFR30015MLC3WTK AirTAC Low-Pressure 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR300 series combines a water-and-particulate filter and a pressure regulator in a single body, so one 1/2 in unit conditions the air and sets the downstream pressure at the same time. This configuration is the 300 size with NPT1/2 ports, a 5 um filter element (code W, finer than the 40 um standard), a manual drain so an operator bleeds the bowl on demand, and the low-pressure regulator type. It is fitted with a round external gauge reading in bar, a reverse/check valve (code K) that holds downstream pressure if the supply dips, and a mounting bracket. The polycarbonate bowl is rated with the unit for a maximum inlet pressure of 1.0 MPa (145 psi) and operation from -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The G-series filter-regulator line runs from size 200 to 600 with ports from 1/8 to 1 in, and options across the range include automatic or differential-pressure drains, the 40 um standard element, embedded square or external round gauges with MPa, psi or bar scales, and G (BSPP) or NPT threads in place of the PT standard. We do not quote a single rated flow figure because AirTAC publishes flow as curves; ask us and we will confirm the datasheet figures for this exact model against your application.
| Model | GFR30015MLC3WTK AirTAC Low-Pressure Filter Regulator NPT1/2 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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. |
| 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) |
Point-of-use preparation for a pneumatic clamping fixture or small press on a production line: the 5 um element keeps water and swarf out of the valve and cylinder seals, the low-pressure regulator holds the working pressure the tooling was set up with, and the check valve holds the clamp if the main supply dips.
Feeds diverters, pushers and sealing cylinders on a packaging conveyor. The manual drain lets an operator bleed accumulated water from the bowl at shift start, and the 1/2 in NPT ports suit a machine-side air drop.
Supplies filtered, regulated air to quarter-turn pneumatic actuators and positioners on a water-treatment or process skid, where the low-pressure regulator type and the bar-scale round gauge match the control loop's instrument range.
Choose the size step by port and expected flow: this unit is size 300 with 1/2 in NPT ports, and smaller 200 or larger 400/600 frames exist if your machine needs a different port. Element choice is 5 um (this model, code W) versus the 40 um standard - pick 5 um where downstream valves, cylinders or instruments are sensitive to fine particles. The manual drain means an operator opens the bowl drain rather than relying on an automatic or differential-pressure drain. The gauge here is the external round type reading bar; embedded square gauges and MPa or psi scales are alternatives. Thread is NPT on this unit; PT is the AirTAC standard and G (BSPP) is also available to order. Flow is published as curves, not a single rating, so send us your flow and pressure requirements and we will confirm sizing from 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 GFR300 series as curves rather than a single rated figure, so we do not quote a number here. Send us your required flow and working pressure and we will confirm the datasheet curve for this NPT1/2 model against your application before you order.
This model carries the L code, meaning the low-pressure regulator type rather than the standard type. AirTAC does not publish the exact adjustment range for the low-pressure type, so we confirm it from the datasheet on request. Maximum inlet pressure remains 1.0 MPa (145 psi), and the rest of the specification - 5 um element, manual drain, round bar gauge, check valve and bracket - is unchanged.
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.