The AirTAC GR40015LJC2 AirTAC Air Pressure Regulator PT1/2 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 GR40015LJC2 is an AirTAC GR-series air pressure regulator: it does one job, holding downstream air pressure steady, and it does nothing else - no filtration and no lubrication are part of this unit. This is the 400 size with a PT1/2 (1/2 in) PT-threaded port, built as the low-pressure type so downstream pressure is adjustable up to 0.4 MPa where the process runs below standard regulator settings. It comes fitted with an external round gauge scaled in psi, and the J suffix means no mounting bracket is supplied, so plan for panel mounting or in-line piping - the GR body is panel-mountable.
This is a genuine AirTAC part. The GR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, standard or low-pressure types, gauge or no gauge, and PT, G (BSPP) or NPT threads by order. Max working 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 series. 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 | GR40015LJC2 AirTAC Air Pressure Regulator PT1/2 Low-Pressure |
|---|---|
| Series | GR400 pressure regulator |
| Port size | PT1/2" (PT 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. |
| (blank) | PT 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 |
Feeding a low-pressure pneumatic actuator on a clarifier or gate valve skid, where the actuator is rated below standard line pressure and the regulator holds the setpoint steady as plant air fluctuates.
Regulating the gentle air pressure that tensions thread guides and air-jet assists on a weaving line, where overpressure damages yarn and the low-pressure range is the working range.
Setting a stable, moderate pressure to the flap-fold and sealing cylinders of a case packer so cartons are closed consistently without slamming, with the psi gauge letting operators check the setpoint at a glance.
Start with the port step: the 400 size takes a 1/2 in port, and larger sizes carry more flow - match the size to the air demand of the circuit rather than to the pipe alone. This unit is the low-pressure (L) type, adjustable up to 0.4 MPa; if your setpoint is higher, the standard GR type covers 0.05-0.9 MPa. The C2 suffix gives you an external round gauge scaled in psi; square embedded gauges and MPa or bar scales are the other catalogue choices. Thread is PT as standard, with G (BSPP) and NPT available to order, and the J suffix means no bracket - order one separately if you want panel mounting hardware.
One honest note on sizing: AirTAC publishes regulator flow as curves, not as a single rated number, so we cannot quote you a rated flow figure. Tell us your application and we will confirm the flow and datasheet figures against it 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 regulator flow as performance curves, not as a single rated figure, so we do not quote a rated flow number. Send us your inlet pressure, setpoint and expected air demand, and we will confirm the flow from the datasheet and check the 400 size against your application before you order.
The L in the code means this regulator is built for downstream settings up to 0.4 MPa, which suits processes running below standard plant air pressure. If your setpoint is higher, the standard GR type in the same size adjusts from 0.05 to 0.9 MPa - we can quote the standard version in the 400 size with the same PT1/2 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.