The AirTAC GR30008JNTK 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 GR30008JNTK is an AirTAC GR-series air pressure regulator: it does one job, holding a stable downstream pressure from a compressed-air supply, and it contains no filter, no bowl and no lubricator. This 300-size unit is decoded 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, J means no mounting bracket is supplied, and N means no gauge is included - the setting is made on the regulator's own adjuster and can be read on a gauge added to the line. Operating temperature is -20 to 70 C, wider than the rest of the G family, and GR is also panel-mountable.
This is a genuine AirTAC part. The GR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, in PT (standard), G and NPT threads, with optional gauge, bracket, low-pressure type and reverse/check valve configurations. Flow is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GR30008JNTK 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 | Supplied without bracket |
| 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. |
| 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. |
| 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 |
Set and hold the clamping pressure feeding air cylinders on a fixture or press, with the reverse/check valve helping hold the downstream setting if upstream supply dips.
Regulate the air feeding diverters, pushers and sealing cylinders on a packaging conveyor so each station sees a steady set pressure from a shared header.
Give a pick-and-place gripper its own adjusted supply point, set independently of the plant header pressure, with a 1/4 in NPT connection into the cell's air drop.
Size and port are the first choice: 200, 300, 400 and 600 step up in port size and flow capacity, so match the size to the air demand of the circuit rather than only to the pipe - here the 300 size carries a 1/4 in NPT port. Decide whether you need a gauge (embedded square gauge or optional external round gauge, with MPa, psi or bar scales - this unit ships without one), whether the reverse/check valve is wanted (fitted on this code), and whether the standard type covers your range or the low-pressure L type, which adjusts up to 0.4 MPa, is the better fit. Thread is PT as standard with G and NPT as orderable options - this code is NPT. A bracket is optional and not included here.
One honest note on sizing: regulator flow is published as pressure-loss curves, not as a single rated number, so we cannot quote you a rated flow figure. Send us your line pressure, set pressure and air demand and we will confirm the correct size against the datasheet curves 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 pressure-loss curves, not as a single rated figure, so we do not quote a rated flow, Cv or SCFM number for this unit. Send us your inlet pressure, set pressure and air demand and we will confirm the sizing against the datasheet curves on request.
No. The N in GR30008JNTK means no gauge is supplied, so the regulator is set on its adjuster and read on a gauge mounted elsewhere in the circuit. If you want a gauge with the unit, GR configurations with an embedded square gauge or an external round gauge (MPa, psi or bar scale) are available in the same family.
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.