The AirTAC GFR30015MLC3TK AirTAC Filter Regulator NPT1/2 Low-Pressure 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 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 GFR30015MLC3TK is a size-300 GFR filter regulator: water and particulate filtration plus pressure regulation in a single body. This configuration carries a 1/2 in NPT port, a 40 um standard filter element, a manual drain bowl in polycarbonate, a low-pressure regulator type, an external round gauge with bar scale, a built-in reverse/check valve, and a mounting bracket. Max 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 available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, PT as the standard thread and G or NPT as order options, a choice of differential-pressure, automatic or manual drain, a 40 um or 5 um (W) element, gauge and scale choices, and a low-pressure regulator type. Flow is published as curves rather than a single rating, so we confirm the datasheet and flow figures for your application on request.
| Model | GFR30015MLC3TK AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 40 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. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Point-of-use conditioning ahead of a carton-sealing or wrapping machine: the 40 um element strips water and pipe scale from the shop-air drop, while the low-pressure regulator holds a gentle, stable supply pressure for sensitive actuators and the check valve holds the circuit if upstream pressure dips.
On a laboratory or pilot-scale process skid where instruments and air-driven stirrers need low, steady pressures, the low-pressure regulator type with a bar-scale gauge gives operators a readable, adjustable supply, and the manual drain lets technicians bleed accumulated condensate at each check.
Feeding looms or knitting machines that run on low-pressure air jets and cylinders: the combined filter-regulator body saves panel space on the machine's air preparation plate, the 1/2 in NPT port matches the machine inlet, and the round bar gauge sits where the operator can watch the setting.
Size 300 with a 1/2 in NPT port suits lines that need more flow than the 200/300 small-port steps; step up to size 400 or 600 if your demand grows, but always size against the published flow curve rather than a single number. The manual drain suits installations where an operator can bleed the bowl on a routine; choose automatic or differential-pressure drain codes if the unit sits where regular manual draining is impractical. The 40 um element is the standard grade; specify the W code for the 5 um option if downstream equipment needs finer filtration. The low-pressure regulator type is intended for setpoints below the standard range - the exact range for this type is not published, so confirm it with us. Gauge scale here is bar; MPa and psi scales are also available. PT is the standard thread, with G and NPT as order options, and the bracket is included with this code.
Because flow is published as curves and not a single rated figure, ask us to confirm sizing against your application before ordering.
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 series as curves, not as a single rated figure, so we do not quote a l/min, m3/h or SCFM number here. Tell us your working pressure and air demand and we will confirm the sizing from the datasheet flow curve on request before you order.
The M in the code selects a manual drain: condensate collected in the polycarbonate bowl is released by operating the drain by hand, which suits positions visited during routine checks. The K code fits a reverse/check valve, which prevents backflow through the unit. If the installation cannot be drained manually, ask about the automatic or differential-pressure drain versions of 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.