The AirTAC GR30010LNTK AirTAC Regulator NPT3/8 Low-Pressure Type is a genuine G-series air pressure regulator. It holds a stable downstream pressure over the range 0.05 - 0.4 MPa (7 - 58 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 GR30010LNTK is an AirTAC GR-series air pressure regulator, built purely for pressure regulation - it contains no filter, no bowl and no lubricator. This unit is the low-pressure type, holding downstream pressure anywhere up to 0.4 MPa, and it carries a reverse/check valve (code K) that holds the set pressure on the downstream side when upstream supply is lost. It is size 300 with NPT3/8 (3/8 in) ports, is rated for a maximum inlet pressure of 1.0 MPa (145 psi), and operates from -20 to 70 C - a wider temperature window than the rest of the G family. No gauge is fitted on this variant (code N), and a mounting bracket is included; the GR series is also panel-mountable.
This is a genuine AirTAC part. The GR line spans sizes 200, 300, 400 and 600 with a choice of PT, G or NPT threads, standard or low-pressure regulation, gauge options and scale choices, and an optional reverse/check valve. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GR30010LNTK AirTAC Regulator NPT3/8 Low-Pressure Type |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT3/8" (NPT thread) |
| Regulating range | 0.05 - 0.4 MPa (7 - 58 psi) |
| Pressure type | Low-pressure 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. |
|---|---|
| 10 | Port size PT3/8". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| L | Low-pressure type — 0.05 - 0.4 MPa (7 - 58 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 · PT3/8" · 0.05 - 0.4 MPa (7 - 58 psi) |
|---|---|
| One size down | GR200 |
| One size up | GR400 |
| Line order | Filter first, then regulator, then lubricator |
On an assembly press, the clamping cylinders often need a gentler, fixed holding pressure than the main plant air line supplies. This low-pressure GR regulator, teed off the main drop in NPT3/8, lets the clamp circuit run at its own reduced setting while the check valve holds the clamp pressure if the main supply dips.
Air knives and blow-off nozzles used to clear dust or dry packs on a packaging conveyor work best at a low, stable pressure well below line pressure. This regulator sits in the NPT3/8 feed to the nozzle manifold and holds that reduced setting, with the check valve preventing back-feed from the manifold into the supply leg.
Spray guns and atomizing heads in a coating or test booth need low-pressure atomizing air that stays steady from first pass to last. Feeding the gun through this NPT3/8 regulator isolates the atomizing circuit from shop-air swings, and the low-pressure range matches the modest settings these heads use.
Start with the port step: this unit is size 300 with NPT3/8 (3/8 in) NPT threads; the GR family steps through 1/8 to 1 inch across sizes 200-600, and the larger the size the larger the port and the greater the flow capacity - match the step to your line's air demand. This is the low-pressure type (code L), which regulates up to 0.4 MPa; if your process needs the full 0.05-0.9 MPa span, choose a standard GR instead. The K in the code means a reverse/check valve is fitted - useful where the set pressure must be held if supply is interrupted. No gauge is fitted (code N); a gauge with your preferred scale can be specified on other variants. Threads are offered as PT (standard), G (BSPP) or NPT - order the option you need. A mounting bracket is included, and GR also panels.
One honest note on sizing: AirTAC publishes GR flow as curves, not as a single rated number, so we do not quote a flow figure here. Send us your application details and we will confirm the datasheet and 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 GR-series flow as performance curves rather than a single rated figure, so we do not quote a flow number for this unit. Tell us your application - line pressure, downstream demand and port size - and we will confirm the datasheet and check the sizing with you before you order.
The L in the code means this regulator adjusts over the low-pressure range, up to 0.4 MPa, instead of the standard GR span of 0.05-0.9 MPa - right for circuits that only ever need a reduced setting. The N means no gauge is fitted on this variant, so you read the setting on your own downstream gauge or specify a gauged variant. It still takes up to 1.0 MPa (145 psi) at the inlet and runs from -20 to 70 C.
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.