The AirTAC GR40010LNT AirTAC Air Regulator NPT3/8 Low Pressure 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 GR40010LNT is an AirTAC GR-series air pressure regulator: it does one job, holding your downstream line at a steady, set pressure regardless of swings in the supply. This is the 400 size with a 3/8 in NPT port, built as the low-pressure (L) type, so its adjustment range tops out at 0.4 MPa for circuits that must never see full line pressure. No gauge is fitted (N code), so add your own downstream gauge or order a gauged variant if you want the setpoint visible at the unit. A mounting bracket is included, and GR bodies are also panel-mountable.
This is a genuine AirTAC part. The GR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, in PT (standard), G (BSPP) or NPT thread, with optional gauges (square embedded or external round, MPa/psi/bar scales) and an optional reverse/check valve (K). GR is the widest-temperature unit in the G family at -20 to 70 C. Flow figures are published as curves rather than a single rating, so ask us to confirm sizing and datasheet details for your application before ordering.
| Model | GR40010LNT AirTAC Air Regulator NPT3/8 Low Pressure |
|---|---|
| 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 | 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.
| 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. |
| (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 | 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 |
On a carton-sealing or case-packing line, pneumatic clamps and hold-downs often need a gentle, stable pressure well below plant supply. This low-pressure GR regulator, set under 0.4 MPa, holds that clamp circuit steady so delicate cartons are held firmly without crushing.
Spray and dip-coating rigs in lab or pilot-plant settings need air delivered at a low, repeatable pressure so film thickness stays consistent between runs. The GR40010LNT regulates that feed at 3/8 in, and its -20 to 70 C range suits unheated service rooms.
Conveyor diverters, gate stoppers and pusher cylinders typically run on low-pressure pilot air so products are nudged, not slammed. Feeding those actuators through this regulator keeps the setpoint fixed even as the main compressor cycles, reducing mis-diverts.
Start with the port step: the 400 size takes a 3/8 in port, one step up from 1/4 in and one below 1/2 in, so match it to the line size your flow demand actually needs - we can check the flow curve against your consumption if you send the figures. Then choose the regulator type: this L (low-pressure) version adjusts up to 0.4 MPa, while the standard GR covers 0.05-0.9 MPa; pick L only where your setpoint stays in the low band. Decide on a gauge and scale (MPa, psi or bar) if you want the setpoint visible, and choose the thread: PT is the catalogue standard, with G (BSPP) and NPT available as order options - this unit is NPT. Brackets are included on GR, and the body is also panel-mountable. Flow is published as curves, not a single rated number, so ask us to confirm sizing against your application 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 flow as performance curves rather than a single rated figure, so there is no one number we can honestly quote. Send us your operating pressure and air consumption and we will confirm sizing from the datasheet curve on request before you order.
L is the low-pressure type: its adjustment range tops out at 0.4 MPa, whereas the standard GR adjusts from 0.05 to 0.9 MPa. Choose L when your setpoint sits in the low band and you want the hardware itself to cap the range. Note this unit is supplied without a gauge (N code); gauged variants with MPa, psi or bar scales are available as order options.
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.