The AirTAC GFR30008JNTK AirTAC Filter Regulator NPT1/4 with Check Valve 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 GFR30008JNTK is a GFR-series filter regulator: it removes water and particulate from compressed air and holds a regulated downstream pressure, all in one body. This 300-size unit is threaded NPT1/4 (1/4 in), carries the standard 40 um filter element, drains condensate by differential pressure, and has a built-in reverse/check valve that holds downstream pressure if the upstream supply is lost. No gauge is fitted (code N) and no mounting bracket is supplied (code J). The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi) and a working temperature of -5 to 70 C (non-freezing). The polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and with manual, automatic or differential-pressure drains, a 5 um element option (code W), gauge and thread choices, and low-pressure variants. Flow for the series is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before you order.
| Model | GFR30008JNTK AirTAC Filter Regulator NPT1/4 with Check Valve |
|---|---|
| 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 | 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". |
| (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. |
| J | Supplied without bracket. |
| 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) |
Feeding clean, regulated air to the sealing and forming cylinders on a carton or pouch packaging line, with the check valve holding the set pressure if the shop-air supply dips mid-cycle.
Supplying regulated air to the clamping fixtures on a CNC cell, where a stable downstream pressure keeps workholding consistent and the 40 um element protects the clamp valves from particulate and water.
Regulating air to the diverter cylinders on a distribution-centre sorting conveyor, with the differential-pressure drain clearing condensate continuously during long running hours.
The real choices on this family are all set by code. Step the size up or down (200/300/400/600) to match the port and flow path your line needs. Pick the drain: differential-pressure as fitted here, automatic (code A) for unattended condensate removal, or manual (code M). Choose the 40 um standard element or the 5 um option (code W) where finer filtration is needed downstream. Thread is selected at order time: PT is the standard, with G (BSPP) and NPT (as on this unit) as catalogue options. Gauge (embedded square or external round, with MPa, psi or bar scales) and bracket options are also code-set - this unit carries neither. The K code adds the reverse/check valve, which is worth specifying wherever a set pressure must be held if the supply is interrupted.
Flow for the GFR series is published as curves, not a single rated figure, so send us your application details 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes GFR-series flow as curves rather than a single rated figure, so we do not quote a number here. Send us your application details - line pressure, downstream demand and duty - and we will confirm the datasheet flow curve and check the sizing of this NPT1/4 unit for your system before you order.
The N in the model code means no gauge is supplied, and gauges are selected by code at order time rather than retrofitted. GFR variants can carry an embedded square gauge or an external round gauge, each available with MPa, psi or bar scales. If you need local pressure indication on this regulator, tell us and we will identify the correct GFR300 variant code for you.
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.