The AirTAC GFR300C08C1TK AirTAC Filter Regulator NPT 1/4 Round 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 See datasheet 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 GFR300C08C1TK is a GFR-series filter regulator: one body that removes water and particulate from compressed air and then regulates the pressure delivered downstream. This size 300 unit is specified with 1/4 in NPT ports, a 40 um filter element, a polycarbonate (PC) bowl with differential-pressure drain, a fitted round gauge with MPa scale, a built-in reverse (check) valve and a mounting bracket. Its regulation range is 0.15-0.9 MPa (20-130 psi), maximum inlet pressure is 1.0 MPa (145 psi), and it operates from -5 to 70 C in non-freezing conditions.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options that include manual or automatic drains, a finer 5 um element (code W), embedded square or external round gauges with MPa, psi or bar scales, G (BSPP) or NPT threads, low-pressure variants and check-valve versions. Flow is published as curves rather than a single rating, so ask us to confirm datasheet figures for your application before ordering.
| Model | GFR300C08C1TK AirTAC Filter Regulator NPT 1/4 Round Gauge |
|---|---|
| Series | GFR300 filter regulator |
| Port size | See datasheet (PT 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 — factory standard, Factory standard scale |
| 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. |
|---|---|
| C0 | Port size See datasheet. 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). |
| (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. |
| (blank) | PT 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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C0 (two-unit set) |
Feeding clean, regulated air to the valve and actuator circuits of a machining centre - tool clamping, tool change and chip-ejection cylinders. The 40 um element protects directional valves from particulate and the 0.15-0.9 MPa setting covers typical clamping pressures, while the check valve holds downstream pressure through supply dips.
Conditioning the air supply to the cylinders and air cylinders of a carton sealer or stretch-wrapper on a packaging conveyor. The differential-pressure drain sheds condensate from the compressed-air line as it collects, and the round MPa gauge lets the line technician verify set pressure at a glance.
Regulating and filtering the air feeding spray guns and air agitators in a finishing booth, where steady set pressure is needed for consistent atomisation. The 40 um element removes water and pipe scale ahead of the guns, and the check valve prevents backflow through the regulator when the booth supply is shut down.
The size step (200 / 300 / 400 / 600) sets both the port and the air-handling capacity, so step up a size if your circuit needs more air than a 1/4 in line can carry. Drain type is a real choice: this unit uses the default differential-pressure drain, which bleeds the bowl automatically as the pressure differential builds; automatic (A) and manual (M) drains are order options. The element is 40 um as standard, with 5 um (code W) available where finer protection matters. This code carries an external round gauge with MPa scale; embedded square gauges and psi or bar scales can be ordered instead. Thread: PT is the AirTAC standard and G (BSPP) or NPT are ordered variants - this unit is NPT. The bracket is included (a J code deletes it). Flow for the GFR series is published as curves, not a single rating, so send us your pressure and air demand and we will confirm sizing against 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 on the page. Tell us your working pressure and air demand and we will confirm the flow for this exact model from the datasheet before you order.
The code decodes as a GFR300 filter regulator with 1/4 in ports, NPT thread (T), a fitted round gauge on the MPa scale (C1) and a reverse/check valve (K). The drain is the default differential-pressure type and the element is the standard 40 um grade; a 5 um element (W), automatic or manual drains and other gauge scales are available as order options.
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.