The AirTAC GR40010JF3T 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 - 0.9 MPa (7 - 130 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 AirTAC GR400 is a dedicated air pressure regulator: it controls downstream pressure only and contains no filter, no drain bowl and no lubricator. This configuration is the 400 size with a 3/8 in NPT thread, the standard (not low-pressure) type, and an embedded square pressure gauge with a bar scale fitted as standard. The set pressure is adjusted anywhere in the 0.05-0.9 MPa (7-130 psi) range with a maximum inlet pressure of 1.0 MPa (145 psi), and the unit operates in temperatures from -20 to 70 C - a wider window than the rest of the G-series. No mounting bracket is included with this code, and the GR family is also panel-mountable.
This is a genuine AirTAC part. The GR line spans four sizes (200 / 300 / 400 / 600) with port sizes from 1/8 in to 1 in, PT as the standard thread and G or NPT as order options, plus choices of gauge scale (MPa, psi or bar), a low-pressure type (up to 0.4 MPa), an optional mounting bracket and an optional reverse/check valve. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GR40010JF3T AirTAC Air Pressure Regulator NPT3/8 |
|---|---|
| Series | GR400 pressure regulator |
| Port size | PT3/8" (NPT thread) |
| Regulating range | 0.05 - 0.9 MPa (7 - 130 psi) |
| Pressure type | Standard 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, bar 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". |
| (blank) | Standard type — 0.05 - 0.9 MPa (7 - 130 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. |
| 3 | Gauge scale: bar. 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 - 0.9 MPa (7 - 130 psi) |
|---|---|
| One size down | GR300 |
| One size up | GR600 |
| Line order | Filter first, then regulator, then lubricator |
Set a stable, reduced pressure downstream of the plant air header so carton-forming and case-sealing cylinders stroke consistently regardless of header pressure swings, with the bar-scale square gauge giving operators a direct local reading.
Regulate supply pressure to a workholding clamp circuit on a machining cell so clamping force stays within the fixture designer's specified band, adjusted anywhere in the 0.05-0.9 MPa range at the panel.
Feed pop-up divertors, stoppers and gate actuators along a sorting conveyor at a fixed reduced pressure so indexing speed and impact stay repeatable, with the regulator panel-mounted at the station drop.
Size the GR400 by port and body size against the air demand of the circuit: the 400 size with its 3/8 in NPT port sits in the middle of the GR range, which steps from 200 (1/8-1/4 in) up to 600 (3/4-1 in). Because flow is published as curves and not as a single rated number, send us your application's air consumption and we will confirm the correct size before you order. Other decodable choices: the standard type covers the full 0.05-0.9 MPa (7-130 psi) adjustment range while the low-pressure L type caps at 0.4 MPa; the gauge can be ordered with an MPa, psi or bar scale (this unit carries the square bar-scale gauge); thread is PT as standard with G and NPT as catalogue options; and a mounting bracket can be added if panel or wall fixing is preferred over the bracketless J configuration.
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 performance curves rather than a single rated figure, so we do not quote a Cv, l/min or SCFM number. Send us your application's air demand and line conditions and we will confirm the sizing against the datasheet curves on request before you order.
GR = pressure regulator, 400 = body size, 10 = 3/8 in port, J = no mounting bracket, F = embedded square gauge, 3 = bar scale, T = NPT thread. The gauge can alternatively be ordered with an MPa (1) or psi (2) scale, and thread is PT as standard with G (BSPP) and NPT available as catalogue options - just specify the variant you need.
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.