The AirTAC GR40010LJC1T AirTAC Air Pressure Regulator NPT3/8 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, 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 GR40010LJC1T is an AirTAC GR-series air pressure regulator in the 400 size with a 3/8 in NPT port. It is the low-pressure type, so its setpoint range tops out at 0.4 MPa, and it is supplied with an external round pressure gauge scaled in MPa. There is no filter element, bowl or drain on this unit - it does one job: holding a steady downstream air pressure. Maximum inlet pressure is 1.0 MPa (145 psi), and the operating temperature range is -20 to 70 C, wider than the rest of the G-series families.
This is a genuine AirTAC part. The GR family spans the 200, 300, 400 and 600 sizes, with standard or low-pressure regulation, gauge or no gauge, NPT, G or PT threads, and bracket or no bracket as orderable options. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures on request.
| Model | GR40010LJC1T AirTAC Air Pressure Regulator NPT3/8 |
|---|---|
| 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 | Supplied without bracket |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -20 to +70 °C |
| Pressure gauge | Fitted — round, MPa 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. |
|---|---|
| 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 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 horizontal form-fill-seal machine, the sealing and tucking stations run best at a gentle, stable pressure. This low-pressure regulator holds that setpoint on a 3/8 in NPT supply line, with the MPa gauge giving the operator a clear reading at the machine.
Belt conveyors that use low-pressure air for hold-down rollers, product diverters and gate actuators need a setpoint that stays put through a shift. This 400-size regulator keeps the downstream circuit steady, and its wider -20 to 70 C range suits unheated warehouse sections.
Pneumatically actuated process valves and dampers in a plant utility skid often call for a modest, precisely held actuator pressure. This regulator supplies that circuit from a 3/8 in NPT line, with the round MPa gauge letting maintenance verify the setpoint without extra instruments.
Start with the port step: 3/8 in on the 400 size suits lines running more air than a 1/4 in line can carry, but the right size depends on your flow demand - ask us to check the flow curve against your application before ordering. This unit is the low-pressure (L) type, correct when your setpoint stays at or below 0.4 MPa; if you need to regulate up to 0.9 MPa, choose a standard GR instead. The round gauge here reads in MPa; psi and bar scales are available as order options. The thread is NPT; PT is the catalogue standard and G (BSPP) is also orderable. This configuration has no mounting bracket, and GR units are also panel-mountable.
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 curves, not as a single rated number, so we do not quote a figure here. Tell us your inlet pressure, setpoint and expected air demand, and we will confirm the sizing from the datasheet on request before you order.
The L in the code marks the low-pressure type of the GR family, whose adjustment range tops out at 0.4 MPa - the right choice for gentle circuits like clamping, sealing or conveying air. If your setpoint must reach the standard GR range of up to 0.9 MPa, order a standard-type GR400-10 instead. This unit is otherwise a 400-size, 3/8 in NPT regulator with a round MPa gauge and no mounting bracket.
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.