The AirTAC GR600-25LJF3TK AirTAC Low-Pressure Regulator NPT1 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" 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 GR600-25LJF3TK is a genuine AirTAC air pressure regulator: it does one job, holding a stable downstream pressure from a compressed-air supply, and it adds no filtration and no lubrication. This 600-size unit is configured with a 1 in NPT port, the low-pressure type (L) whose setpoint range tops out at 0.4 MPa, a square pressure gauge reading in bar, and a built-in reverse (check) valve (K) that blocks backflow through the regulator. It ships without a mounting bracket (J), and GR bodies are also panel-mountable. Maximum working (inlet) pressure is 1.0 MPa (145 psi), and the GR series carries the widest temperature envelope in the G family: -20 to 70 C.
GR regulators are offered across the AirTAC G-series sizes 200, 300, 400 and 600, with port sizes stepping up from 1/8 in to 1 in, standard or low-pressure regulation, gauge or no gauge, optional check valve, and PT (standard), G (BSPP) or NPT threads. Because AirTAC publishes flow for this series as curves rather than a single rated figure, we confirm the datasheet and flow figures for your application on request.
| Model | GR600-25LJF3TK AirTAC Low-Pressure Regulator NPT1 |
|---|---|
| Series | GR600 pressure regulator |
| Port size | PT1" (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 | Fitted (reverse flow permitted) |
| 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.
| GR600 | G-series pressure regulator, 600 body — sets the port range. |
|---|---|
| 25 | Port size PT1". This body offers 20 = PT3/4", 25 = PT1". |
| 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. |
| K | Reverse-flow (reflux) valve fitted. |
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 | GR600 · PT1" · 0.05 - 0.4 MPa (7 - 58 psi) |
|---|---|
| One size down | GR400 |
| Line order | Filter first, then regulator, then lubricator |
Set and hold a gentle clamp pressure for delicate workpieces on a press line, with the check valve holding the setting against backflow and the bar gauge giving the operator a clear setpoint readout.
Feed the sealing and tucking cylinders of a carton or bag machine at a low, stable pressure so seals stay consistent, with the 1 in port serving as the machine's main regulated drop.
Panel-mount the regulator at a workshop air drop feeding low-pressure tools, actuators or air tables, using the wide -20 to 70 C range for areas of the plant that see cold shifts.
Start with the port step: this is the 600 size with a 1 in connection, the largest in the G-series line, so it suits lines where big-bore cylinders or high-demand drops are fed from a single regulation point. This unit is the low-pressure type (L), so choose it when your setpoint must stay at or below 0.4 MPa; for setpoints up to 0.9 MPa, the standard GR type is the correct pick instead. The fitted square gauge reads in bar; round external gauges and MPa/psi scales are the other catalogue choices. Thread is NPT here, with PT (the standard) and G (BSPP) available to order, and the J code means no bracket is fitted, so plan for panel mounting or add a bracket variant. Flow for the GR series is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
Quick checklist
The reflux valve lets air flow back through the regulator, which is useful when downstream volume must vent quickly. A regulator does not remove water or particulate; that is the filter's job.
AirTAC publishes flow for the GR series as curves, not as a single rated number, so there is no one rated-flow figure we can honestly quote. Tell us your application and we will confirm the flow data from the datasheet on request before you order.
The L in the code selects the low-pressure type, whose adjustment range tops out at 0.4 MPa, instead of the standard GR type. If your setpoint needs to go above 0.4 MPa, you need the standard type rather than this unit. Everything else here is standard GR: 1.0 MPa (145 psi) maximum inlet, -20 to 70 C, square bar gauge fitted, check valve fitted, and NPT thread with PT and G available as order options.
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.