The AirTAC GR30008NTK AirTAC Air Pressure Regulator NPT1/4 is a genuine G-series air pressure regulator. It holds a stable downstream pressure over the range 0.05 - 0.9 MPa (7 - 130 psi) with PT1/4" ports, ordered without a gauge. A regulator does not filter the air — put a GF filter upstream, or use a GFR filter regulator, when water and particulate must also be removed.
The GR30008NTK is an AirTAC GR-series air pressure regulator for compressed air, and regulation is the only function it performs - there is no filter element, no bowl and no lubricator in this unit. This configuration is the GR300 size with a 1/4 in NPT port, the standard regulator type with an adjustment range of 0.05-0.9 MPa (7-130 psi) and a maximum inlet pressure of 1.0 MPa (145 psi). The K in the code means a reverse (check) valve is fitted, and the N means no gauge is supplied, so you can add a gauge of your choice or order a gauge variant. The trailing T sets the thread to NPT; PT is the standard thread for this series and G (BSPP) is also a catalogue option. Operating temperature is -20 to 70 C, wider than the rest of the G family, and a mounting bracket is included - the GR is also panel-mountable.
This is a genuine AirTAC part. The GR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, with optional gauge, low-pressure type, reverse valve and PT/G/NPT thread choices. Flow for this series is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet and flow figures for the GR30008NTK against your application before you order.
| Model | GR30008NTK AirTAC Air Pressure Regulator NPT1/4 |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT1/4" (NPT thread) |
| Regulating range | 0.05 - 0.9 MPa (7 - 130 psi) |
| Pressure type | Standard type |
| Bracket | Fixing bracket included |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -20 to +70 °C |
| Pressure gauge | Not fitted |
| Reflux valve | Fitted (reverse flow permitted) |
| Mounting | Panel mounting; optional fixing bracket |
Specifications follow the official AirTAC G-series air-preparation data. Note the GR temperature range is -20 to +70 °C, wider than the other G-series units. A regulator has no bowl and no filter element, so there is no filtering grade. Flow curves, weight and outline dimensions are not published in our data set — ask us and we will confirm from the factory datasheet.
| GR300 | G-series pressure 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) | Standard type — 0.05 - 0.9 MPa (7 - 130 psi). Blank is standard, L is the low-pressure type. |
| (blank) | Fixing bracket included. |
| 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. |
| 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, type, bracket, gauge, gauge shape, scale, thread, reflux — a blank position takes the default. Example: GR300-08LNK is a 300 body, PT1/4", low-pressure type, no gauge, with 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 rather than from a single rated figure.
| This model | GR300 · PT1/4" · 0.05 - 0.9 MPa (7 - 130 psi) |
|---|---|
| One size down | GR200 |
| One size up | GR400 |
| Line order | Filter first, then regulator, then lubricator |
On a bench or C-frame pneumatic press, this 1/4 in NPT regulator holds a steady set pressure to the cylinder so forming and staking strokes stay repeatable, with the check valve holding the downstream setting if upstream supply dips.
On cartoning and wrapping machines with 1/4 in air drops to grippers and fold cylinders, the GR30008NTK gives each circuit its own 0.05-0.9 MPa setting, and the -20 to 70 C range suits cold-store packaging lines.
When building or retrofitting a machine's pneumatic panel, the included bracket or panel mounting lets this GR300 regulator sit alongside valves and fittings on the sub-panel, regulating one 1/4 in branch independently of the main line.
Sizing a GR regulator starts with the port step: the GR300 in 1/4 in sits in the middle of the 200/300/400/600 range, and the right size depends on the flow your circuit needs - we can check that against the published flow curves before you commit. Decide whether you want a gauge fitted and which scale (MPa, psi or bar), whether the standard 0.05-0.9 MPa range covers your setpoint or the low-pressure type (up to 0.4 MPa) is a better match, and whether a reverse (check) valve is wanted - this unit already has one fitted. Thread is PT as standard with G (BSPP) and NPT as orderable options; this unit is NPT. A mounting bracket is included and the GR can also be panel-mounted.
One honest note on sizing: AirTAC publishes regulator flow as curves, not as a single rated number, so there is no honest one-line flow figure we can quote here. Tell us your line pressure, set pressure and approximate air demand, and we will confirm from the datasheet that the GR30008NTK is the right size before you order.
Quick checklist
The reflux valve lets air flow back through the regulator, which is useful when downstream volume must vent quickly. A regulator does not remove water or particulate; that is the filter's job.
AirTAC publishes regulator flow as curves, not as a single rated figure, so there is no honest one-number flow rating we can state here. Tell us your inlet pressure, set pressure and air demand, and we will confirm the flow figures for the GR30008NTK from the datasheet on request before you order.
N means no pressure gauge is supplied with this regulator, so you read the setting at your own downstream gauge or order a gauge variant with the scale you want (MPa, psi or bar). K means a reverse (check) valve is fitted, which helps hold the downstream pressure if the upstream supply 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.