The AirTAC GR40010LJF1T 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 GR40010LJF1T is an AirTAC GR-series air pressure regulator: its only job is to hold a steady downstream air pressure, and it does nothing else - no filtration, no bowl, no lubrication. This 400-size unit is built with 3/8 in NPT ports and carries the L low-pressure specification, so its setting range tops out at 0.4 MPa, suited to circuits that must never see full line pressure. The F1 suffix brings the embedded square gauge, scaled in MPa, so the set pressure is readable at the valve, and J means no mounting bracket is fitted - the body can still be panel-mounted.
This is a genuine AirTAC part from the GR400 size class of the G series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in up to 1 in, a choice of PT (standard), G or NPT threads, standard or low-pressure regulation, gauge scale options and bracket or no-bracket builds. Max 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 family. Rated flow for GR regulators is published as curves rather than a single figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GR40010LJF1T 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 — square, 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). |
| F | Gauge shape: Square. 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 |
Set a stable, capped supply pressure to spray guns and atomising air lines in a finishing booth, where the coating process calls for reduced pressure well below the shop main and the square MPa gauge lets operators read and hold the setpoint.
Feed instrument panels, agitator seals or purge lines on a pilot skid that must run at reduced pressure; the low-pressure L specification keeps the downstream circuit limited to 0.4 MPa even if the header upstream is at full line pressure.
Regulate the air to blow-off and product-separating nozzles on a packaging conveyor, where gentle, repeatable pressure protects lightweight cartons and film, and the embedded gauge lets line staff verify the setting at a glance.
Start with the port step: this unit is 400 size with 3/8 in NPT ports, and the G series steps 200/300/400/600 through 1/8 in to 1 in, so match the size to the air demand of the circuit - we can confirm the flow curves against your consumption before you order. Because this is a GR, there is no drain, no filter grade and no bowl to choose; the real decisions are the regulator type (this is the L low-pressure version, limited to 0.4 MPa - pick the standard type if you need up to 0.9 MPa), the gauge (embedded square gauge in MPa here; round gauges and psi or bar scales are catalogue options), the thread (PT is the standard; G and NPT are ordered options, and this unit is NPT), and the bracket (J = none, and GR is also panel-mountable).
One honest note on sizing: AirTAC publishes regulator flow as curves, not as a single rated number, so we do not quote a flow figure here. Tell us your line pressure, set pressure and air consumption and we will confirm from the datasheet that this GR400 low-pressure unit is the right size 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 curves rather than as a single rated figure, so we do not quote a flow number for this unit. Send us your inlet pressure, set pressure and air consumption and we will confirm the relevant datasheet curve and sizing for your application on request.
The L in the code marks the low-pressure type of the GR family, whose setting range tops out at 0.4 MPa - chosen deliberately for circuits that must never see full line pressure. If your application needs settings up to 0.9 MPa, order the standard GR type instead; the same 400 size and 3/8 in ports are available in that version.
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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.