The AirTAC GFR30008NTK AirTAC Filter Regulator NPT 1/4 in 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 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 GFR30008NTK is a 300-size filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has a 1/4 in NPT port, the standard 40 um filter element, a differential-pressure drain that bleeds collected condensate automatically when the pressure differential is sufficient, a built-in reverse (check) valve, and no gauge fitted. The standard regulator adjusts outlet pressure across 0.15-0.9 MPa (20-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi). The polycarbonate bowl suits non-freezing, non-corrosive compressed-air duty from -5 to 70 C.
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600, with port options from 1/8 in to 1 in, PT (standard), G or NPT threads, manual, automatic or differential-pressure drains, an optional 5 um element, gauge choices, and a low-pressure regulator type. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR30008NTK AirTAC Filter Regulator NPT 1/4 in |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Standard 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 | Not fitted |
| 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. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). 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". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard 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. |
| 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 · PT1/4" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Conditioning and regulating the shop-air feed to a cartoning or wrapping machine's pneumatic cylinders, with the check valve holding the downstream circuit if the main supply drops.
Feeding clean, regulated air to conveyor gate cylinders and product stoppers on a distribution line, where the differential-pressure drain keeps condensate off the valves between shifts.
Supplying filtered, regulated air to workholding clamps on a CNC fixture, where stable downstream pressure and particulate-free air protect the clamping valves.
Size and port set the capacity: the 300 size with a 1/4 in NPT port is a common step for machine supply lines, but always match the size step to the flow your line actually needs. The differential-pressure drain suits installations where the unit runs steadily and you want condensate removed without daily attention; choose a manual drain for intermittent duty and an automatic drain for unattended operation. The standard 40 um element protects most pneumatic components; specify the 5 um (W) element where finer filtration is required. This unit ships with no gauge, so plan your pressure indication separately, and note the fitted check valve holds downstream pressure if the upstream supply is lost. NPT is the thread here; PT and G are order options. Flow is published as curves, not a single rating, so 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 GFR300 series as curves, not as a single rated figure, so we do not quote a number here. Tell us your line pressure and the flow your application needs, and we will confirm the datasheet curves and correct sizing on request before you order.
The K option adds a reverse (check) valve, so downstream pressure is held if the upstream supply is interrupted. The N option means no gauge is supplied with the unit, so you will need to plan pressure indication separately - gauges are available as a catalogue option on this family. The regulator itself is the standard type with a 0.15-0.9 MPa (20-130 psi) adjustment range.
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.