The AirTAC AirTAC GR600-25L Low-Pressure Air Regulator, NPT 1 in 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 GR600-25L is an AirTAC GR-series air pressure regulator: it does one job, holding a stable downstream pressure on a compressed-air line. This is the 600 size with a 1 in NPT port, built as the low-pressure type, so its adjustment range tops out at 0.4 MPa instead of the standard range - the right choice where the process itself runs at low pressure and fine control down there matters more than headroom. The fitted round external gauge reads in psi, and an integrated reverse/check valve holds the downstream setting if upstream supply is interrupted. No mounting bracket is fitted; as a GR unit it can also be panel-mounted.
This is a genuine AirTAC part. The GR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, standard and low-pressure types, gauge choices and scales, G/NPT thread options and bracket variants, so a matching unit exists for most line sizes. Flow is published as curves rather than a single rated figure, so send us your application details and we will confirm the sizing and datasheet figures on request before you order.
| Model | AirTAC GR600-25L Low-Pressure Air Regulator, NPT 1 in |
|---|---|
| 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 — round, psi 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). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 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 |
Air-jet weaving machines need a steady, moderate pressure on their weft-insertion air rather than full line pressure. This low-pressure GR regulator on the 1 in NPT feed lets the loom set-up team dial in and hold the working pressure the process was tuned for.
Carton-erecting and shrink-wrap stations often run air nozzles and cooling jets at reduced pressure to protect film and product. Fed from a 1 in header, this regulator with its psi gauge gives the line technician a visible, repeatable setting for the whole manifold.
Lab drying and purge applications typically run at low pressures where a standard-range regulator offers little usable adjustment. The low-pressure type on a 1 in NPT supply line, with a check valve holding the setting, keeps the purge air gentle and consistent.
Start with the port step: 600 size takes a 1 in connection, and the right size is the one whose flow curve covers your consumption at your working pressure - ask us to check it against the datasheet before ordering. Then decide the type: this L-coded unit is the low-pressure type with adjustment up to 0.4 MPa; if your line needs settings above that, the standard GR type is the correct pick. The fitted round gauge reads in psi; square embedded gauges and MPa or bar scales are the other catalogue options. Thread is NPT here - PT is the standard thread and G (BSPP) is the alternative order option. This configuration has no bracket (GR is also panel-mountable) and includes a reverse/check valve (code K); both can be specified differently. Because flow is published as curves, not a single rating, confirm sizing with us 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 GR flow as curves, not as a single rated number, so we do not quote a flow figure for this unit. Tell us your line pressure, set pressure and air consumption, and we will confirm against the datasheet curve whether the 600 size at 1 in NPT is correctly sized - on request, before you order.
L marks the low-pressure type: its adjustment range tops out at 0.4 MPa, versus 0.05-0.9 MPa for the standard GR. Choose this version when your process runs at low pressure and you need usable control in that band; choose the standard type when you need settings above 0.4 MPa. Both share the same 1.0 MPa maximum inlet pressure and -20 to 70 C operating range.
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.