The AirTAC GR30010JNT AirTAC Air Pressure Regulator NPT 3/8 in 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 PT3/8" 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 GR30010JNT is an AirTAC GR-series air pressure regulator: it does one job, holding downstream pressure steady at the setting you choose. This 300-size unit is fitted with a 3/8 in NPT port, is the standard (not low-pressure) type, and is supplied without a gauge and without a mounting bracket. Setpoint adjustment spans 0.05-0.9 MPa (7-130 psi) with a maximum inlet (working) pressure of 1.0 MPa (145 psi), and the unit operates in ambient temperatures from -20 to 70 C - a wider range than the rest of the G-series air-treatment family. As a regulator it contains no filter, no bowl and no drain, so it is the right choice when the air is already filtered upstream and only pressure control is needed.
This is a genuine AirTAC part. The GR family is offered in 200, 300, 400 and 600 sizes with port sizes from 1/8 in to 1 in, and with options including G or NPT thread, a low-pressure type (L), a fitted reverse/check valve (K), an embedded square gauge or external round gauge with MPa, psi or bar scale, and a mounting bracket (the GR is also panel-mountable). Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application.
| Model | GR30010JNT AirTAC Air Pressure Regulator NPT 3/8 in |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT3/8" (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 | Not fitted |
| 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. |
|---|---|
| 10 | Port size PT3/8". 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. |
| (blank) | No reverse-flow valve (the default). |
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 · PT3/8" · 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 stamping or assembly press, clamping cylinders need a fixed, repeatable holding pressure lower than the header line. A standalone regulator set between the filter and the valve manifold holds that clamp pressure steady shift after shift.
Machine tools often take filtered shop air and need one controlled pressure for tool-change cylinders and air-assist functions. A regulator on the branch feeding the machine keeps those functions independent of swings in the main supply.
On a packaging or cartoning line, cylinder speed and gentle product handling depend on stable supply pressure to the directional valves. A regulator set at the line's working pressure protects the motion sequence from header-pressure variation.
Start with the port step: the 300 size carries a 3/8 in port, one step up from 1/4 in and one below 1/2 in, so match it to your line size and the flow your actuators need. The GR30010JNT is the standard type; if your setpoint must sit below the standard range, ask about the low-pressure (L) variant, which adjusts up to 0.4 MPa. This unit ships without a gauge - add one if you want the setpoint visible at the unit, choosing the embedded square gauge or an external round gauge with an MPa, psi or bar scale. Thread is NPT here; PT is the standard catalogue thread and G (BSPP) is also available to order. A mounting bracket (J means none fitted) and a reverse/check valve (K) are further decodable options. One honest note on sizing: flow for the GR series is published as curves, not a single rated number, so send us your application details and we will confirm the datasheet figures before you order.
Quick checklist
Without a reflux valve, air cannot flow back through the regulator — order the K option if reverse flow is required. A regulator does not remove water or particulate; that is the filter's job.
AirTAC publishes GR-series flow as performance curves rather than a single rated figure, so we do not quote a rated flow number for this model. Tell us your line size and the flow your application needs, and we will confirm the datasheet curve and check the sizing with you before you order.
Yes. In the GR code, N means no gauge is fitted, and J means no mounting bracket. You can order a GR300 variant with an embedded square gauge or an external round gauge, with the scale in MPa (1), psi (2) or bar (3), and with a bracket included by dropping those letters from the code. Thread options are PT (standard), G and NPT, and a low-pressure type (L) or reverse/check valve (K) are also available.
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.