The AirTAC GR30008JC3TK 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, and ships with a pressure 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 GR30008JC3TK is an AirTAC GR300 series air pressure regulator for compressed air, built around 1/4 in NPT ports. It is the standard-type regulator with an adjustment range of 0.05-0.9 MPa (7-130 psi) and a maximum inlet (working) pressure of 1.0 MPa (145 psi). This configuration carries a round external pressure gauge scaled in bar, and a reverse (check) valve is fitted, so downstream pressure is held if the upstream supply drops. Operating temperature is -20 to 70 C, wider than the rest of the G-series, and the unit is supplied without a mounting bracket, though GR regulators can also be panel-mounted.
This is a genuine AirTAC part. The GR300 sits in the GR size range of 200, 300, 400 and 600, with port sizes stepping up from 1/8 in to 1 in, and options including G or NPT thread, gauge scale (MPa, psi or bar), a low-pressure type, a check valve and a mounting bracket. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GR30008JC3TK 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 | Fitted — round, bar scale |
| 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. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 3 | Gauge scale: bar. 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 a stable, repeatable holding pressure for clamp cylinders on a machining fixture. The check valve keeps the clamp circuit from venting if the main air supply dips mid-cycle.
Feed carton-sealing and case-packing cylinders from a plant air header, with the bar-scaled gauge letting operators read and reset line pressure at a glance during changeover.
Give each workbench its own 1/4 in outlet pressure point for air tools and small actuators, tuned independently of the main header, with panel or bracket mounting to suit the station layout.
Pick the GR size by the port and flow your line needs: this GR300 gives a 1/4 in port, and larger sizes (400, 600) step up in port and capacity. Set the outlet with the 0.05-0.9 MPa (7-130 psi) adjustment range; if your circuit runs below that band, the GR low-pressure type (code L) covers up to 0.4 MPa. Choose the gauge scale to suit the operator - this unit is supplied with a round gauge in bar, while MPa and psi scales and a square embedded gauge are catalogue options. Thread is NPT here; PT is the standard and G (BSPP) is an order option. A check valve (fitted on this model) holds downstream settings if supply is lost, and a bracket can be added if you do not panel-mount. Flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
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 GR regulator flow as curves, not as a single rated figure, so there is no one flow number we can quote. Tell us your port size and required flow and we will confirm the figures from the datasheet on request before you order.
The K in the model code means a reverse (check) valve is fitted: if upstream pressure is lost, the valve holds the downstream setting instead of venting it. It is an option - the same regulator without the K code is supplied without the check valve.
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.