The AirTAC GFR300-08F1TK AirTAC Filter Regulator NPT1/4 with Gauge 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 GFR300-08F1TK is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This 300-size unit is threaded NPT1/4, carries the standard 40 um filter element, and drains condensate by differential pressure, so the bowl purges automatically as flow passes through. The regulator is the standard type with a 0.15-0.9 MPa (20-130 psi) adjustment range, a square pressure gauge scaled in MPa is fitted, and a reverse/check valve is built in to hold downstream pressure if the supply drops.
This is a genuine AirTAC part from the GFR300 series. The GFR line spans sizes 200, 300, 400 and 600 with port sizes from 1/8" to 1", and options include a 5 um filter element (code W), automatic or manual drain, psi or bar gauge scales, and G or NPT threads in place of the PT standard. Flow figures are published as curves rather than a single rating, so ask us to confirm the datasheet for your application.
| Model | GFR300-08F1TK AirTAC Filter Regulator NPT1/4 with Gauge |
|---|---|
| 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 | Fitted — square, MPa 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. 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. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 1 | Gauge scale: MPa. 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) |
Feeding a small pneumatic press or clamping fixture, this unit dries the shop air to 40 um, holds the working pressure set on the MPa gauge, and the check valve keeps the cylinder from losing position during a supply dip.
On a packaging line driving diverters and pusher cylinders, the filter regulator conditions the air at the drop, the differential-pressure drain keeps condensate off the valves, and the 1/4" NPT port matches standard machine drops.
For a bench running impact drivers and air ratchets, it strips water and pipe scale from the header line, lets the operator set tool pressure on the square gauge, and the built-in check valve cushions the line between tool bursts.
Size and port are the first choice: the 300 size with its 1/4" NPT port suits general machine supply lines, while stepping up to 400 or 600 gives larger ports for higher air demand - match the step to the flow your line actually draws. Drain type is a real decision: differential-pressure (this unit) purges with flow, automatic (code A) suits lines with intermittent flow, and manual (code M) needs someone to open the drain. The 40 um element is standard; specify the 5 um W grade where downstream valves or instruments need finer filtration. Gauge scale (MPa, psi or bar) and thread (PT standard, G or NPT to order) are set at purchase, and a bracket is included for mounting.
One honest note on sizing: AirTAC publishes flow for this series as curves, not as a single rated figure, so we cannot quote a number here. Tell us your application and we will confirm the sizing against the datasheet 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 series as curves, not as a single rated figure, so we do not quote a number here. Tell us your application and required flow, and we will confirm the sizing from the datasheet before you order.
This unit has no drain code, which means differential-pressure drain: condensate is purged from the PC bowl automatically as air flows through. If your line runs intermittently, order code A for automatic drain; if you want full manual control, code M gives a manual drain with a wider 0.05-0.9 MPa regulation 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.