The AirTAC GFR30008ANT AirTAC Filter Regulator NPT1/4 Auto Drain 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 automatic 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 GFR30008ANT is a 300-size filter regulator that cleans compressed air and holds downstream pressure in one body. This configuration has a 1/4 in NPT port, a 40 um standard filter element that removes water and particulate, an automatic drain that expels collected condensate without manual attention, and a standard regulator adjustable from 0.15 to 0.9 MPa (20-130 psi). No gauge is fitted with this code, so add one separately if a visual setpoint is needed. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits the 300 size; only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR family is offered in 200, 300, 400 and 600 sizes with port options from 1/8 to 1 in, PT as standard and G or NPT as order options, plus a choice of drain type, 40 um or 5 um (W) filtration, gauge style and scale, and bracket fitment. Flow figures are published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR30008ANT AirTAC Filter Regulator NPT1/4 Auto Drain |
|---|---|
| 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 | Automatic 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. 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". |
| A | Drain: Automatic 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. |
| (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) |
Feeding a directional-valve manifold on an automated assembly station: the 40 um element keeps scale and pipe debris out of the valve spools while the regulator holds a steady setpoint for consistent cylinder seating.
Air preparation for a small bench-mounted pneumatic press: the automatic drain keeps condensate out of the press cylinder between shifts, and the regulator lets the operator set ram force without touching the main supply.
A dedicated air drop for a carton-sealing or wrapping machine: the filter regulator cleans and stabilises supply to the machine's actuators at its own 1/4 in NPT connection, isolated from pressure swings elsewhere in the plant.
Start with the port step: this unit is 1/4 in NPT in the 300 size; step up to 400 or 600 if the line needs more capacity, and match the thread to your piping - PT is the standard, with G (BSPP) and NPT available to order. Choose the drain to suit access: automatic (this code) suits unattended duty, manual suits supervised points, and differential-pressure drain is the catalogue default. Pick 40 um for general air preparation or the 5 um (W) element where finer particulate removal matters. Decide on a gauge (square embedded or external round, in MPa, psi or bar scale) and whether a bracket is needed. Because flow is published as curves rather than a single rating, 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. 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 GFR300 series as curves, not as 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 N in GFR30008ANT means no gauge is fitted. Units with a regulator can take an embedded square gauge or an optional external round gauge, with MPa, psi or bar scale - add one at order time if you want a visual setpoint reference.
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.