The AirTAC GR30008JC2K AirTAC Air Pressure Regulator PT1/4 psi Gauge 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 GR30008JC2K is an AirTAC GR300 series air pressure regulator for compressed air, built for one job: holding a steady, user-set downstream pressure from a variable supply. This configuration decodes to a 1/4 in PT1/4 port, the standard (non low-pressure) regulator type with an adjustment range of 0.05-0.9 MPa (7-130 psi), a maximum inlet pressure of 1.0 MPa (145 psi), and an operating temperature of -20 to 70 C - the widest temperature window in the G-series. An external round gauge scaled in psi is fitted so operators can read and set the outlet pressure directly, and a built-in reverse (check) valve lets downstream air bypass the regulator when the supply is cut, protecting the circuit on shutdown.
This is a genuine AirTAC part. The GR300 is one of four GR sizes (200, 300, 400, 600) covering larger ports and higher flow, with options including G or NPT threads, MPa/psi/bar gauge scales, a low-pressure type limited to 0.4 MPa, and bracket or panel mounting. Flow is published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GR30008JC2K AirTAC Air Pressure Regulator PT1/4 psi Gauge |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT1/4" (PT 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, psi 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. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | PT 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 holding pressure for clamping cylinders on a fixture, with the fitted check valve keeping the clamp side pressurised if the shop-air supply drops or is switched off.
Feed gripper and end-of-arm actuator circuits from a regulated 1/4 in drop, letting the technician dial in and read the exact grip pressure on the psi gauge at the cell.
Regulate the air feeding sealing arms and pusher cylinders on a packaging line, with the -20 to 70 C rating suiting cold-store-adjacent installations and the check valve holding settings between cycles.
Start with the port step: GR comes in 200, 300, 400 and 600 sizes, each stepping up in port and flow capacity, so match the size to the air demand of the circuit rather than only to the existing pipe thread. This unit is 1/4 in PT1/4; G (BSPP) and NPT threads are catalogue options to order if your pipework needs them. Choose the gauge scale you want to read - MPa, psi or bar - and decide whether the embedded square gauge or the external round gauge suits your panel. The K code here means a reverse/check valve is fitted; specify it whenever downstream cylinders or actuators must hold pressure during an air-supply loss. GR is also panel-mountable, and a bracket is optional (this configuration is supplied without one). One honest note on sizing: flow is published as curves, not a single rated figure, so send us your application details and we will confirm the right size against the datasheet 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 GR300 flow as curves rather than a single rated figure, so we do not quote a l/min, m3/h or SCFM number. Send us your application details - supply pressure, set pressure and the equipment being fed - and we will confirm the relevant datasheet flow figures on request before you order.
K means a reverse (check) valve is fitted. It lets downstream air pass back through the regulator when the upstream supply is lost, so actuators and clamps are not left locked against a dead regulator. If your circuit does not need that behaviour, the same regulator is available without the K code.
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.