The AirTAC GR600-25LF1TK 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 GR600-25LF1TK is an AirTAC GR-series air pressure regulator in the largest 600 size, decoded here with a 1 in NPT port. This is the low-pressure (L) type, so it regulates outlet pressure up to 0.4 MPa - suited to circuits that must never see full-line pressure. It is a regulator only: it controls pressure downstream and contains no filter, no bowl and no lubricator. The code confirms an embedded square gauge with MPa scale fitted, a reverse/check valve (K) that holds downstream pressure when upstream supply is lost, and a mounting bracket included; the GR family is also panel-mountable.
This is a genuine AirTAC part. The GR line spans sizes 200 to 600 with ports from 1/8 in to 1 in, standard or low-pressure regulation, gauge or no-gauge builds, optional check valve, and PT (standard), G or NPT thread options. Flow is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GR600-25LF1TK 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 | Fixing bracket included |
| 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 | 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. |
| (blank) | Fixing bracket included. |
| (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. |
| 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 |
On a machining line where workpieces are held by air clamps that must not be squeezed at full line pressure, this low-pressure regulator caps the circuit at up to 0.4 MPa, and the check valve holds the clamp pressure if the main supply drops.
Looms, winders and converting lines often run delicate pneumatic elements - dancers, lay-on rollers, thread guides - at gentle pressures; the 1 in NPT port feeds the header while the L-type range keeps set-points in the low band.
Spray and coating installations need a stable, moderate-pressure air feed to guns and agitators; a 600-size regulator at the booth inlet with an MPa-scale gauge gives operators a clear, adjustable low-pressure supply.
Size up by port and flow: the 600 size with its 1 in connection is the right step when your line is built around 1 in piping and you want the regulator not to be the bottleneck - but because flow is published as curves, not a single rating, ask us to confirm sizing against your actual air demand before ordering. This unit is the low-pressure type, correct only if your working pressure stays at or below 0.4 MPa; for higher set-points choose the standard GR type. Other decodable choices: gauge scale (MPa, psi or bar), embedded square versus external round gauge, the K check-valve option, PT versus G/NPT thread, and bracket or no bracket. GR is also panel-mountable if you prefer that to bracket fixing.
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 regulator flow as performance curves rather than a single rated figure, so we do not quote a number here. Tell us your inlet pressure, set-point and air demand, and we will confirm the datasheet curve figures for this exact model on request before you order.
L marks the low-pressure type: this unit regulates outlet pressure up to 0.4 MPa, instead of the wider standard GR range. If your process needs set-points above 0.4 MPa, choose the standard type instead. The rest of the code confirms a 1 in NPT port, a fitted square gauge on the MPa scale, a check valve, and an included mounting bracket.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models are processed and dispatched in 3-5 business 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.