The AirTAC GFR300C08JNTK AirTAC Filter Regulator NPT1/4 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 GFR300C08JNTK is a GFR-series filter regulator: water and particulate filtration plus downstream pressure regulation combined in one 300-size body with a 1/4 in NPT port. This configuration carries a 40 um standard filter element and a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element is high enough, so there is no drain fitting to operate by hand. The regulator is the standard type with a setting range of 0.15-0.9 MPa (20-130 psi), a reverse/check valve is fitted to hold the downstream setting if upstream pressure is lost, and no pressure gauge is supplied with this code. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR filter-regulator family is available in sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, PT as the standard thread and G or NPT as order options, with choices of drain type, 40 um or 5 um filtration, gauge and scale, bracket and check valve. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR300C08JNTK AirTAC Filter Regulator NPT1/4 |
|---|---|
| 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) |
Point-of-use conditioning for a CNC machining cell: the 40 um element strips water and swarf-carrying particulate from the shop line before it reaches solenoid valves and air cylinders, while the regulator holds a steady downstream setting for clamping and tool-change actuators.
Feeding the diverters, pushers and stopper cylinders on a packaging conveyor line. The filter-regulator keeps condensed water out of the actuators and holds a consistent operating pressure so product handling stays repeatable through the shift.
Conditioning the air supply to a quarter-turn pneumatic valve skid on a process line: the check valve holds the set pressure against upstream dips so valve actuators do not see pressure fluctuations mid-stroke, and the differential-pressure drain keeps condensate off the internals.
Size and port step up together: 200, 300, 400 and 600 cover 1/8 in through 1 in, and the 300 size with its 1/4 in NPT port suits compact point-of-use drops and small machine circuits. Because this code has no gauge letter, no gauge is fitted - a gauge can be specified on other codes in the family if you want a visible setting. The 40 um element is the standard grade; the 5 um W option is the choice where finer particulate removal matters. Thread is NPT here, while PT is the catalogue standard and G is also available as an order option, and the J code means no mounting bracket is included.
Flow for the GFR series is published as curves, not a single rated number, so we do not quote a rated flow figure. Send us your application's flow and pressure requirement and we will confirm the correct size and datasheet figures 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 rated SCFM or l/min number. Tell us your required flow and working pressure and we will confirm the datasheet curve and check the 300 size against your application before you order.
The N in the code means no pressure gauge is supplied with this unit. The regulator still adjusts across 0.15-0.9 MPa (20-130 psi), but you would verify the setting with a separate downstream gauge or specify a GFR300 code that includes a gauge. The fitted check valve (K) holds the downstream setting if upstream pressure is lost.
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.