The AirTAC GR30008LNTK AirTAC Low-Pressure Regulator, NPT1/4 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, ordered without a 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 GR30008LNTK is an AirTAC GR-series air pressure regulator: it does one job, holding a steady downstream pressure from your compressed-air supply. This is the 300 size with a 1/4 in NPT port, built as the low-pressure (L) type, so its regulated output range tops out at 0.4 MPa - suited to circuits that must not see full line pressure. Maximum working (inlet) pressure is 1.0 MPa (145 psi), operating temperature is -20 to 70 C, and a reverse/check valve is fitted so downstream pressure is held if the supply side drops. No gauge is fitted with this code (N), and a mounting bracket is included; the GR body is also panel-mountable.
This is a genuine AirTAC part. The GR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, in standard and low-pressure types, with or without gauge, bracket or reverse/check valve, and with PT, G (BSPP) or NPT threads. Because AirTAC publishes flow only as curves rather than a single rated figure, we confirm the datasheet and flow data for your exact model on request.
| Model | GR30008LNTK AirTAC Low-Pressure Regulator, NPT1/4 |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT1/4" (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 | Not fitted |
| 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.
| GR300 | G-series pressure regulator, 300 body — sets the port range. |
|---|---|
| 08 | Port size PT1/4". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| 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. |
| N | No pressure gauge (N). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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 | GR300 · PT1/4" · 0.05 - 0.4 MPa (7 - 58 psi) |
|---|---|
| One size down | GR200 |
| One size up | GR400 |
| Line order | Filter first, then regulator, then lubricator |
A pneumatic clamp on an assembly line that must grip gently and hold a set pressure well below plant line pressure. The L-type regulator limits output to 0.4 MPa, and the fitted check valve keeps the clamp from relaxing if the main supply dips.
A paint or coating booth where atomizing air has to sit at a low, repeatable pressure for consistent finish. The GR30008LNTK regulates the 1/4 in NPT feed down from the shop-air header to the low setting the process calls for.
A blow-off or air-knee header clearing dust and moisture from containers on a conveyor. The low-pressure regulator lets operators set a stable, gentle air pressure so labels and lightweight packs are not disturbed, with the check valve holding the setting through supply fluctuations.
Start with the port step: the 300 size takes a 1/4 in port here, and the larger the size (200 to 600), the larger the port and the more flow the body can pass - match the size to the air demand of the circuit rather than just the pipe you have. Then set the type: this L-code unit is the low-pressure type with output up to 0.4 MPa; if your process needs the standard range up to 0.9 MPa, choose a GR without the L code. Decide on the reverse/check valve (K holds downstream pressure on supply loss), the gauge (this code has none; gauge scale options are MPa, psi or bar), the thread (PT is the standard; G and NPT are order options), and the bracket (included on this code).
One honest note on sizing: AirTAC publishes regulator flow as curves, not as a single rated number, so we do not quote a flow figure here. Send us your application's air demand and we will confirm from the datasheet that this 300-size unit is correctly sized before you order.
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 curves rather than a single rated figure, so we do not state a flow number here. Tell us your inlet pressure, set pressure and the air demand of the circuit, and we will confirm the flow data from the GR300 datasheet for this exact model before you order.
L marks the low-pressure type: its regulated output range tops out at 0.4 MPa instead of the standard GR range, which suits circuits that must never see full line pressure. The N code means no gauge is fitted with this unit; a gauge (square embedded or external round, scaled in MPa, psi or bar) can be specified on the equivalent code if you want a local pressure readout.
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.