The AirTAC GR40010LNTK 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 - 0.4 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 GR40010LNTK is an AirTAC GR-series air pressure regulator: it does one job, holding a stable downstream pressure from a compressed-air supply, and nothing else - no filter, no bowl and no lubricator are part of this family. This is the 400 size with a 3/8 in NPT port, built as the low-pressure type, so its adjustment range tops out at 0.4 MPa for circuits that must never see high pressure. The K in the code means a reverse (check) valve is fitted, and the N means no gauge is supplied, so add your own gauge if downstream pressure must be visible. Maximum inlet pressure is 1.0 MPa (145 psi), and the working temperature range is -20 to 70 C - wider than the rest of the G family.
This is a genuine AirTAC part. The GR line spans the 200, 300, 400 and 600 sizes with port sizes from 1/8 in to 1 in, in standard and low-pressure types, with or without gauge, bracket or check valve, and in PT, G or NPT thread. 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 | GR40010LNTK AirTAC Air Pressure Regulator, NPT 3/8 in |
|---|---|
| Series | GR400 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.
| GR400 | G-series pressure regulator, 400 body — sets the port range. |
|---|---|
| 10 | Port size PT3/8". This body offers 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 | GR400 · PT3/8" · 0.05 - 0.4 MPa (7 - 58 psi) |
|---|---|
| One size down | GR300 |
| One size up | GR600 |
| Line order | Filter first, then regulator, then lubricator |
A packaging machine whose pneumatic clamp arms must close gently and hold at a low, fixed pressure. The low-pressure GR40010LNTK lets the line setter dial the clamp circuit in below 0.4 MPa and the check valve holds the setting against supply dips.
Forming and ejection cylinders on a thermoforming cell that run best at a deliberately low pressure to avoid distorting thin-walled containers. The 3/8 in NPT port feeds the station manifold, and the regulator keeps the working pressure steady through the shift.
Atomizing and conveying air to a coating booth where product finish depends on holding one consistent low pressure. The regulator is set once at the booth drop, the bracket fixes it to the panel, and the wide -20 to 70 C range suits an unheated plant corner.
Start with the port step: the 400 size takes a 3/8 in port, one step up from the 300 and one down from the 600, so pick the size whose flow curve covers your demand with margin. The L code makes this the low-pressure type - correct when the controlled pressure must stay at or below 0.4 MPa; if you need to regulate up to 0.9 MPa, choose a standard GR without the L. Other decodable choices on the GR line: a gauge (square embedded or external round, in MPa, psi or bar scale) if you want the setpoint visible; PT as the standard thread with G and NPT as order options; and the bracket, which is included here, with GR also panel-mountable. Because flow is published as curves and not a single rating, send us your flow and pressure requirements and we will confirm the right size from 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 flow as performance curves, not as a single rated number, so we will not quote a figure that is not in the datasheet. Tell us your inlet pressure, set pressure and air demand, and we will confirm the correct size against the datasheet curves on request before you order.
No. N means no gauge is fitted with this unit, so the setpoint is adjusted blind unless you add a gauge to your circuit. If you want a gauge, the GR line offers an embedded square gauge or an external round gauge, each available in MPa, psi or bar scale - just order the GR400 variant with the gauge 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.