The AirTAC GR30010LC3TK 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, 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 GR30010LC3TK is an AirTAC GR-series air pressure regulator: it does one job, holding your downstream pressure steady, and it deliberately contains no filter, no bowl and no lubricator. This size-300 unit is decoded as the low-pressure type (L), so its adjustment range tops out at 0.4 MPa - the right choice for circuits that run below standard line pressure and need fine, stable setting rather than a wide range. The T in the code specifies 3/8 in NPT ports, the C3 specifies a round pressure gauge with a bar scale, and the K specifies a built-in reverse (check) valve that holds the set pressure if upstream supply is interrupted. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -20 to 70 C, wider than the rest of the G family.
This is a genuine AirTAC part. The GR line comes in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, in standard or low-pressure types, with your choice of gauge (round or square, scaled in MPa, psi or bar), a reverse-valve option, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GR30010LC3TK 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 | 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. |
|---|---|
| 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. |
| (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 · 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 a CNC fixture circuit that clamps delicate aluminium workpieces at reduced pressure, the GR30010LC3TK holds a stable low setting below 0.4 MPa so the clamp grips without distorting the part, while the check valve keeps the setting if the main supply drops.
On a lab test bench or pilot rig where instruments and small actuators must see a repeatable, low set pressure, the low-pressure type regulator gives fine adjustment in the sub-0.4 MPa region, with the bar-scale round gauge making the set point easy to read and record.
On a packaging line's blow-off station, where cartons are cleaned with low-pressure air jets, this regulator lets the line technician dial in and hold a gentle set pressure that will not dislodge product, and the reverse valve prevents the circuit from venting back on supply loss.
Start with the port step: size 300 with 3/8 in NPT ports suits lines whose pipe run is 3/8 in; step up to size 400 or 600 where the circuit needs more flow capacity, or down to 200 for compact drops. Choose the low-pressure (L) type only when your working pressure stays at or below 0.4 MPa - for standard shop-air settings up to 0.9 MPa, pick the standard GR instead. This unit ships as decoded with a round bar-scale gauge and a reverse/check valve already fitted; if you would rather read psi or MPa, or omit the gauge, those are decodable options on other codes in the range.
Thread is a real choice: PT is the catalogue standard, while G (BSPP) and NPT are ordered as suffix options - this code is the NPT version, so match it to NPT fittings. A mounting bracket is included, and GR is also panel-mountable. Flow is published as curves, not a single rated figure, so send us your flow and pressure requirements and we will confirm sizing 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 GR-series flow as performance curves rather than a single rated figure, so we do not quote a rated flow, Cv or l/min number for this unit. Tell us your line pressure, set pressure and required flow, and we will confirm the sizing against the datasheet curves on request before you order.
The L in the code makes this the low-pressure type, whose adjustment range goes up to 0.4 MPa - ideal for circuits that run below standard shop-air pressure. This exact code also decodes as a size-300 unit with 3/8 in NPT ports, a round gauge scaled in bar, a built-in reverse (check) valve, and a mounting bracket included. If you need settings up to 0.9 MPa, choose a standard GR code instead.
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.