The AirTAC AirTAC GR40015LJC2T Air 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, 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 AirTAC GR40015LJC2T is a genuine AirTAC air pressure regulator in the 400 size with 1/2 in NPT ports. This is the low-pressure type, so it holds downstream pressure anywhere up to 0.4 MPa, with a maximum working (inlet) pressure of 1.0 MPa (145 psi). It is supplied with an external round pressure gauge reading in psi, and without a mounting bracket; the GR body is also panel-mountable. As a pure regulator it contains no filter, no bowl and no drain, and it handles compressed air only, with an operating temperature range of -20 to 70 C.
GR regulators are available in 200, 300, 400 and 600 sizes with port sizes from 1/8 in to 1 in, in standard or low-pressure versions, with or without a bracket, with embedded square or external round gauges in MPa, psi or bar scales, and in PT, G or NPT threads. We are happy to confirm flow and other datasheet figures for this model on request.
| Model | AirTAC GR40015LJC2T Air 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 | Supplied without bracket |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -20 to +70 °C |
| Pressure gauge | Fitted — round, psi scale |
| 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 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 |
On a carton-sealing or case-packing line, delicate pneumatic clamps and pushers need a gentler supply pressure than the main header delivers. This low-pressure GR regulator, fitted in the drop to the clamp circuit, lets a technician dial the downstream pressure up to 0.4 MPa and hold it steady as the machine cycles.
In a paint or powder-coating booth, atomising and conveying air must be set well below line pressure for a consistent finish. Placed at the booth drop, this 1/2 in NPT regulator gives the operator a dedicated low-pressure setting with a round psi gauge to read and repeat the set point between shifts.
Adhesive and conformal-coating dispensers on an SMT line are sensitive to supply pressure drift. This GR400 regulator in the feed to the dispensing head holds a stable low-pressure setting, with the psi gauge giving the process engineer a visible reference for recipe setup.
Choose the GR size and port step against the air consumption of the circuit it feeds: this 400-size unit carries 1/2 in NPT ports, and larger sizes carry larger ports and more flow. Pick the regulator type to match the working pressure: this low-pressure (L) version covers settings up to 0.4 MPa, while the standard GR covers 0.05-0.9 MPa. The gauge scale is a real choice too - this unit has a round gauge in psi, and MPa or bar scales are available. Thread is PT as standard with G and NPT as order options, and the bracket is optional (this unit ships without one; the GR is also panel-mountable).
One honest note on sizing: flow for the GR series is published as curves, not as a single rated figure, so please ask us to confirm sizing against your application before ordering.
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-series flow as curves rather than as a single rated number, so we do not quote a rated flow, Cv or SCFM figure for this model. Tell us your application and we will confirm the flow data from the datasheet on request before you order.
The L in the code makes this the low-pressure version: its adjustment range tops out at 0.4 MPa, which suits circuits that must never see full line pressure. A standard GR (without L) adjusts from 0.05 to 0.9 MPa. Both share the same 1.0 MPa maximum inlet pressure, so choose the type by the downstream pressure your process needs.
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.