The AirTAC GR30015LF3TK AirTAC Air Regulator 1/2 in NPT, Low Pressure 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, 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 GR30015LF3TK is an AirTAC GR300-series air pressure regulator for compressed air, built for lines that need a controlled supply at reduced pressure. This configuration is the low-pressure type, so it regulates up to 0.4 MPa, with 1/2 in NPT ports for the main air line. It carries an embedded square gauge scaled in bar (an external round gauge is optional), a built-in reverse/check valve that holds the downstream setting if upstream supply is interrupted, and a mounting bracket is included; the GR300 can also be panel-mounted.
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 or low-pressure types, with your choice of gauge scale (MPa, psi or bar), reverse/check valve, bracket and thread form (PT standard, G or NPT to order). 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 | GR30015LF3TK AirTAC Air Regulator 1/2 in NPT, Low Pressure |
|---|---|
| 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 | 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.
| 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. |
| (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 | 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 |
Pneumatic clamp and hold-down cylinders on a palletizing cell often run best at a gentle setpoint well below main line pressure. This low-pressure GR300 regulator with its 1/2 in NPT ports sits in the drop to the clamp manifold and holds the set pressure, with the check valve keeping the setting if the upstream supply dips.
Air jets and hold-down pads that stabilize cartons or film on a packaging conveyor need steady, reduced pressure rather than full line pressure. Mounted at the line drop, this regulator lets an operator set and read the pressure on the bar-scale square gauge and keeps the downstream side stable through supply swings.
Big diaphragm-actuated air valves in a plant air header take their positioning signal from a pilot pressure that must sit well below line pressure. This GR300 regulator, teed off the 1/2 in main with its check valve holding the pilot line, gives the actuator a stable low-pressure reference that stays put when the header fluctuates.
Size the GR300 by stepping port size against the air demand of the circuit: this unit is 1/2 in NPT, and the GR range runs 200/300/400/600 with larger ports for higher demand. Choose the low-pressure type (this unit) where the working setpoint stays within its up-to-0.4 MPa range, or the standard type where you need the wider adjustment range. Pick the gauge scale - MPa, psi or bar (this unit is bar) - decide whether you want the reverse/check valve, and confirm the thread: PT is the standard, with G and NPT available as order options. A bracket is included and panel mounting is possible.
One honest note before ordering: regulator flow is published as curves, not a single rated number, so send us your line pressure, set pressure and air consumption and we will confirm sizing against the datasheet before you commit.
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, not as a single rated figure, so we do not quote a number here. Send us your inlet pressure, set pressure and air consumption and we will confirm the relevant datasheet figures for the GR300 on request before you order.
The L in GR30015LF3TK marks the low-pressure regulator type, which adjusts up to 0.4 MPa instead of the standard range - the right choice where the setpoint stays low. The K marks a fitted reverse (check) valve, which holds the downstream pressure if the upstream supply is lost. The F3 is the square gauge scaled in bar, and the T is the NPT thread on the 1/2 in ports.
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.