The AirTAC GR30015LNTK AirTAC Low-Pressure Regulator NPT1/2 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 PT1/2" 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 GR30015LNTK is an AirTAC GR-series air pressure regulator: it does one job, holding a steady downstream air pressure, and it does nothing else. This is the low-pressure (L) type, so its adjustment range tops out at 0.4 MPa, which suits circuits that must never see full line pressure. It is a size-300 unit with 1/2 in NPT ports, and the K in the code means a reverse (check) valve is fitted, so downstream air cannot flow back through the unit. No gauge is fitted (code N) and there is no filter element, no bowl and no drain, because a GR is regulation only.
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 a gauge, and with an optional reverse valve. It handles a maximum inlet pressure of 1.0 MPa (145 psi) and works from -20 to 70 C, a wider temperature window than the rest of the G family. A mounting bracket is included and the unit is also panel-mountable. Flow is published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application.
| Model | GR30015LNTK AirTAC Low-Pressure Regulator NPT1/2 |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT1/2" (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. |
|---|---|
| 15 | Port size PT1/2". 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 · PT1/2" · 0.05 - 0.4 MPa (7 - 58 psi) |
|---|---|
| One size down | GR200 |
| One size up | GR400 |
| Line order | Filter first, then regulator, then lubricator |
On a treatment-plant skid where diaphragm valves and actuators are rated well below main line pressure, the regulator holds a gentle, stable supply pressure so seats and diaphragms are never over-stressed, while the check valve stops backflow from the actuator lines.
Carton clamps, hold-down fingers and flap-fold cylinders on a packaging line often need only a light, consistent pressure to grip without crushing. The low-pressure range keeps the setting inside that window, and the 1/2 in ports feed a multi-station drop from one unit.
Purge manifolds, air knives and drying cabinets in lab and pilot-plant work need a low, repeatable air pressure rather than full shop supply. This regulator lets the operator set and hold a mild pressure, with the check valve protecting the set circuit from reverse flow when supply is shut off.
Start with the port: size 300 carries 1/2 in ports here, and the step up to size 400 or down to size 200 changes both the connection and the flow path, so match the size to the air demand of the circuit. This unit is the low-pressure type, correct where the working pressure must stay at or below 0.4 MPa; for circuits that need the full 0.05-0.9 MPa range, choose the standard GR type instead. Thread is NPT as coded; PT is the catalogue standard and G (BSPP) is available as an order option. A gauge can be added if you want a visible setpoint, and the reverse valve (K) is worth specifying whenever downstream volume could push air back into the regulator. Because flow is published as curves and not a single rated figure, send us your application details and we will confirm sizing against the datasheet 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 performance curves, not as a single rated number, so we do not quote a figure here to avoid misleading you. Tell us your line pressure, set pressure and air demand, and we will confirm the sizing from the datasheet curves on request before you order.
The L in the code marks the low-pressure version: its adjustment range tops out at 0.4 MPa instead of the standard type's 0.05-0.9 MPa, which is right for circuits that must never see full line pressure. The N in the code means no gauge is fitted; a gauge can be specified on other variants if you want a visible setpoint.
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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.