The AirTAC GFR30008MLNT AirTAC Filter Regulator NPT1/4 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 PT1/4" 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 GFR30008MLNT is a size-300 filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single compact body. This configuration has 1/4 in NPT ports, a manual drain bowl in polycarbonate, and the standard 40 um filter element. It is the low-pressure (L) type, so the regulator is built for circuits that run below standard line pressure; the exact adjustment range for the low-pressure type is not published in the catalogue, so confirm it with us before ordering. No gauge is fitted (code N) and no reverse/check valve is fitted; a mounting bracket is included.
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, and can be ordered with automatic, manual or differential-pressure drains, a 5 um (W) filter element, an optional gauge, G or NPT threads, and with or without a bracket. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and datasheet figures against your application.
| Model | GFR30008MLNT AirTAC Filter Regulator NPT1/4 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (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 | Not fitted |
| 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. |
|---|---|
| 08 | Port size PT1/4". 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. |
| N | No pressure gauge (N). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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. |
| (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 · PT1/4" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
A machining cell that clamps workpieces at reduced line pressure uses this filter regulator to clean the air and hold a low set pressure at the clamp circuit, with the manual drain bled during shift-start checks.
On a packaging line where conveyor diverters and pusher cylinders run at modest pressures, this unit filters water and debris from the shop air and lets a technician set the circuit pressure by hand.
A lab test bench drawing instrument-grade air from a shop compressor uses this filter regulator to strip water and particles and to dial in a low, stable supply pressure for sensitive fixtures.
Start with the port step: this unit is size 300 with 1/4 in NPT ports, so size up to 400 or 600 if your line may need more flow later. The manual drain (M) means someone bleeds the bowl by hand on a routine; choose the automatic drain variant if the unit sits where nobody passes regularly. The 40 um element is the standard grade; order the W variant for 5 um filtration where finer protection is needed. No gauge is fitted on this code, so add a gauge-equipped variant if operators need to see the set pressure. Thread is NPT here; PT is the standard and G (BSPP) is also an order option. A bracket is included for panel or wall fixing.
Because catalogue flow is published as curves rather than one rated number, send us your application conditions 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. 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 rather than a single rated figure, so we do not quote a number here. Tell us your line pressure, set pressure and expected air demand, and we will confirm the sizing from the datasheet before you order.
The M in the code specifies a manual drain: the polycarbonate bowl is bled by hand, which suits stations that are checked routinely. The L specifies the low-pressure regulator type, intended for circuits running below standard line pressure; its exact adjustment range is not published, so confirm it with us. This code also has no gauge fitted and includes a mounting bracket.
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.