The AirTAC GR40015LNT AirTAC Air Pressure Regulator NPT1/2 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 PT1/2" 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 GR40015LNT is an AirTAC GR-series air pressure regulator: it does one job, holding a stable downstream air pressure from a variable supply line. This is the low-pressure (L) type in the 400 size, fitted with a 1/2 in NPT port, and it is specified without a gauge (code N). Its setting range goes up to 0.4 MPa, which suits circuits that must never see full line pressure - clamping, low-pressure actuation and similar duties. As a regulator it has no filter and no bowl, so it does not remove water or particulate; pair it with a GF filter upstream if the line needs conditioning.
This is a genuine AirTAC part. The GR family spans the 200, 300, 400 and 600 sizes with port options from 1/8 in to 1 in, thread options PT (standard), G and NPT, a standard or low-pressure regulator type, gauge or no-gauge builds, and an optional reverse/check valve. The 400 body takes a 1/2 in port and is the natural step for higher-flow circuits. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GR40015LNT AirTAC Air Pressure Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GR400 pressure regulator |
| Port size | PT1/2" (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. |
|---|---|
| 15 | Port size PT1/2". 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 · PT1/2" · 0.05 - 0.4 MPa (7 - 58 psi) |
|---|---|
| One size down | GR300 |
| One size up | GR600 |
| Line order | Filter first, then regulator, then lubricator |
Fixture clamps and soft-grip pallets on a machining cell often need a held pressure well below main line level. The GR40015LNT regulates the clamp circuit at or below 0.4 MPa so delicate parts are held without crushing, fed from a 1/2 in NPT drop.
Carton erectors, label heads and wrapping arms on a packaging line run short-stroke cylinders that only need gentle, stable air. This regulator sits in the 1/2 in supply to that section, keeping actuation pressure consistent through the shift.
Bench-scale reactors, sample handling skids and pneumatic dosing pumps in a lab or pilot plant need a tame, low-pressure air supply. The low-pressure type limits the setting to 0.4 MPa, protecting sensitive instruments downstream of the 1/2 in feed.
Start with the port step: the 400 size carries a 1/2 in port, and larger sizes mean larger ports and more flow - match the size to the circuit rather than upsizing blindly. This unit is the low-pressure (L) type, so choose it when the controlled pressure must stay at or below 0.4 MPa; for settings above that, the standard GR type with its 0.05-0.9 MPa range is the correct pick. Decide whether you want a gauge fitted (square embedded or external round, in MPa, psi or bar scales) - this code has none. Thread is NPT here; PT is the catalogue standard and G is also available to order. A mounting bracket is included, and GR bodies are also panel-mountable.
Because GR flow is published only as curves and not as a single rated number, we cannot quote a rated flow for this unit. Send us your application details and we will confirm the sizing against the datasheet curves 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 regulator flow as performance curves, not as a single rated figure, so we do not quote a rated flow, Cv or SCFM number for this unit. Tell us your line pressure, set pressure and the flow your application needs, and we will confirm the sizing against the datasheet curves on request before you order.
The N in GR40015LNT is the no-gauge code, so this unit ships without a pressure gauge. GR regulators can be ordered with an embedded square gauge or an external round gauge, with MPa, psi or bar scales - if you want to read the set pressure directly, ask for the gauge-equipped variant of the same 400 size and 1/2 in NPT port.
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.