The AirTAC GR20008LJF3T AirTAC Air Regulator NPT1/4 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 PT1/4" 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 GR20008LJF3T is an AirTAC GR200-series air pressure regulator in the low-pressure type, built for lines that must run well below normal shop pressure. It regulates compressed air only, with 1/4 in NPT ports, a maximum inlet pressure of 1.0 MPa (145 psi), and an adjustment range up to 0.4 MPa. The embedded square gauge fitted to this unit reads in bar, so operators can set and monitor downstream pressure at a glance; an external round gauge is available as an option. This configuration carries no mounting bracket, and the GR series is also panel-mountable. As a pure regulator, it contains no filter, bowl or drain, and its operating temperature range of -20 to 70 C is wider than the rest of the G family.
This is a genuine AirTAC part. The GR family spans four sizes (200, 300, 400 and 600) with progressively larger ports and flow capacity, plus options for thread (PT standard, G or NPT), gauge scale (MPa, psi or bar), a reverse/check valve, low-pressure type and bracket choice. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and flow figures for your application on request.
| Model | GR20008LJF3T AirTAC Air Regulator NPT1/4 Low-Pressure |
|---|---|
| Series | GR200 pressure regulator |
| Port size | PT1/4" (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, 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.
| GR200 | G-series pressure regulator, 200 body — sets the port range. |
|---|---|
| 08 | Port size PT1/4". This body offers 06 = PT1/8", 08 = PT1/4". |
| 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. |
| 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 | GR200 · PT1/4" · 0.05 - 0.4 MPa (7 - 58 psi) |
|---|---|
| One size up | GR300 |
| Line order | Filter first, then regulator, then lubricator |
Pneumatic clamps on a machining cell that hold thin-wall or soft workpieces need reduced air pressure so the fixture does not distort the part. A low-pressure regulator set well below shop supply keeps clamp force gentle and repeatable, with the bar-scale square gauge letting the setter verify the setting at the panel.
Atomising air to spray guns in a refinish or industrial coating booth must be held at a low, stable setting independent of shop-air swings. This low-pressure regulator on the gun-supply drop holds the downstream pressure where the gun was set up, and the square gauge gives the operator a visible reference for every shift.
Air nozzles that clear crumbs, dust or moisture from packs on a food or pharma conveyor often need only modest pressure - full shop air wastes air and disturbs lightweight packs. A low-pressure regulator on the blow-off header sets the minimum pressure that does the job, with the gauge confirming the line stays where it was set.
Start with the size and port: this unit is size 200 with 1/4 in NPT ports, the smallest step in the GR range. Step up to GR300/GR400/GR600 with larger ports when the line demands more flow, and match the thread to your piping - PT is the standard, with G (BSPP) and NPT as catalogue options to order. Choose the low-pressure type (L) only when the downstream setting must stay at or below 0.4 MPa; the standard GR covers the full 0.05-0.9 MPa range. Decide on gauge scale (MPa, psi or bar), whether a reverse/check valve is needed, and whether to order with or without a bracket (GR also panel-mounts). Because flow for this series is published as curves rather than a single rating, 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 characteristic curves, not as a single rated figure, so there is no one flow number we can honestly quote. Send us your inlet pressure, set pressure and expected air demand, and we will confirm the sizing against the datasheet curves on request before you order.
The L in the code marks the low-pressure type: its adjustment range tops out at 0.4 MPa, versus up to 0.9 MPa for the standard GR. Choose it when the downstream setting must stay low - for spray guns, clamping or blow-off - and maximum inlet pressure is still 1.0 MPa (145 psi). If your setpoint could ever exceed 0.4 MPa, order the standard type instead.
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.