The AirTAC GFR300C08JNWTK AirTAC Filter Regulator 1/4 in NPT 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 GFR300C08JNWTK is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in one body. It removes water and particulate from compressed air through a 5 um element and holds downstream pressure within a 0.15-0.9 MPa (20-130 psi) adjustment range. This configuration is 1/4 in NPT threaded, drains condensate by differential pressure (no manual draining needed), and carries a built-in reverse/check valve so backflow cannot upset the set pressure. No gauge is fitted and no mounting bracket is supplied, so you can add your own gauge and bracketing to suit the installation.
This is a genuine AirTAC part in the GFR300 size family, which spans 200/300/400/600 sizes with port options from 1/8 in to 1 in and PT, G or NPT threads. Because flow is published as curves rather than a single rating, we confirm the datasheet flow figures for your application on request before you order.
| Model | GFR300C08JNWTK AirTAC Filter Regulator 1/4 in NPT |
|---|---|
| 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) |
Cleaning and regulating the shop-air feed to a machining centre's pneumatic tool changer and clamping circuits, with the 5 um element protecting fine spool valves and the check valve holding settings against backflow.
Conditioning the air feeding conveyor stopper and gating cylinders on a packaging line, where the filter regulator keeps actuator speed consistent by holding a steady downstream pressure.
Supplying cleaned, regulated air to benchtop analytical or test instruments that specify a maximum inlet particulate size, using the 5 um grade and the differential-pressure drain for unattended operation.
Choose the 300 size with its 1/4 in port when your line flow sits in the mid range of the G-series ladder; step up to 400/600 or down to 200 as your flow demand changes. The 5 um element in this unit suits air that feeds sensitive components; the 40 um standard grade remains available if coarser protection is enough. Drain choice matters: differential-pressure drain (this unit) passes condensate automatically as pressure differential builds, while automatic and manual drains are orderable alternatives. Thread is NPT here, with PT and G orderable; gauge, bracket and reverse valve are all selectable options. Flow for this family is published as curves, not a single rating, so 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 this family as curves rather than a single rated figure, so we do not quote a number. Tell us your line pressure, set pressure and expected air demand, and we will confirm the flow figures from the datasheet for your application on request before you order.
The N in the code means no gauge is fitted; you can order a gauge variant or add a suitable gauge yourself. The K means a reverse/check valve is built in, which prevents backflow through the unit. The J means no mounting bracket is supplied, and W is the 5 um filter element.
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.