The AirTAC GFR30008ANTK 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 GFR30008ANTK is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 300 unit is configured with a 1/4 in NPT port, a 40 um standard filter element, and an automatic drain that expels collected condensate without manual attention. The built-in standard regulator adjusts from 0.15 to 0.9 MPa (20-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi), and a reverse/check valve is fitted so downstream pressure is held if the supply drops. The polycarbonate bowl suits the 300 size, a mounting bracket is included, and the operating temperature range is -5 to 70 C (non-freezing). No gauge is fitted in this configuration.
This is a genuine AirTAC part from the GFR300 series. The GFR family spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, a 5 um (code W) element option, gauge and thread variants, and low-pressure or check-valve options. Flow figures for this family are published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR30008ANTK 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 | 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". |
| 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. |
| 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) |
Clean, regulated air feeding pneumatic clamps and fixtures on a machining centre, with the automatic drain clearing condensate between shifts and the check valve holding clamp pressure if the supply drops.
Point-of-use air prep for cylinders and diverters on a packaging conveyor, where the 1/4 in NPT port matches typical drop lines and the automatic drain suits lines that run unattended.
Regulated, filtered air for sample-handling and valve manifolds in a laboratory automation bench, where the 40 um element protects downstream components and the bracket gives tidy panel mounting.
Start with the port step: the GFR300 in 1/4 in NPT sits in the middle of the range, and moving up to size 400 or 600 gains port size and flow capacity, while size 200 suits compact drops. Choose the drain to match how the unit will be serviced: automatic (this configuration) suits unattended duty, manual drain suits attended stations, and differential-pressure drain is the catalogue default. The 40 um element is standard; specify the 5 um (W) option where finer filtration is needed. Gauge versions of this family carry an embedded square gauge with MPa, psi or bar scale, or an external round gauge; this unit has none fitted. Thread is PT as standard, with G (BSPP) and NPT as order options, and a bracket is included (code J omits it).
One honest note on sizing: AirTAC publishes flow for this family as curves, not as a single rated figure, so we do not quote a flow number here. Send us your application details and we will confirm the datasheet curve and sizing 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 GFR family as curves rather than a single rated figure, so we do not quote a flow number here. Tell us your application and downstream demand and we will confirm the datasheet curve and check the sizing for you before you order.
The N in the code means no gauge is fitted on this configuration. Gauge versions of the GFR300 series carry an embedded square gauge with an MPa, psi or bar scale, and an external round gauge is also available - ask us to quote the gauge variant that matches your panel.
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.