The AirTAC GR30015LJF1T 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, 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 GR30015LJF1T is an AirTAC GR-series air pressure regulator: its only job is to hold a steady downstream air pressure, and it does that alone - no filter, no bowl and no lubricator are built into this unit. The L in the code marks the low-pressure type, so it regulates up to 0.4 MPa, a fit for circuits that run below the standard regulator band. This configuration is the 300 size with a 1/2 in NPT thread, a square pressure gauge fitted (MPa scale), and no mounting bracket.
This is a genuine AirTAC part. The GR family spans the 200, 300, 400 and 600 sizes with port options from 1/8 in to 1 in, PT as the standard thread and G or NPT as order options, with gauge, bracket and reverse/check-valve choices along the way. Flow is published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GR30015LJF1T 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 | Supplied without bracket |
| 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 | Not fitted |
| 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. |
| J | Supplied without bracket. |
| (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. |
| (blank) | No reverse-flow valve (the default). |
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 packaging or converting line, glue and coating applicators often need air held at a gentle, stable setting well below normal line pressure. This low-pressure regulator, set under 0.4 MPa, keeps the applicator's actuation steady so bead placement stays consistent through the shift.
Bench rigs and pilot skids running pneumatic stirrers, sample actuators or air-operated valves frequently operate at reduced pressure. Dropping a 1/2 in NPT branch to a controlled low setting with the fitted MPa gauge lets an operator read and hold the setpoint without a second instrument.
Air bearings, tension rollers and low-pressure support pads on textile and paper machinery are damaged by pressure surges. Feeding them through this regulator isolates the circuit from main-line swings, holding the gentle, constant supply these components need.
Start with the port step: the 300 size carries a 1/2 in port here, and the right size is the one whose flow curve covers your machine's air demand with margin - because GR flow is published as curves, not a single rated number, send us your demand and we will confirm the sizing before you order. This unit is the low-pressure (L) type, regulating up to 0.4 MPa; if your circuit needs the full 0.05-0.9 MPa band, choose a standard GR instead. The square gauge fitted here reads in MPa; psi and bar scales are the other catalogue options. Thread is NPT in this code, with PT as the standard and G as an order option, and the J code means no mounting bracket is supplied - order a bracketed variant if you want panel bolting; GR is also panel-mountable.
Quick checklist
Without a reflux valve, air cannot flow back through the regulator — order the K option if reverse flow is required. A regulator does not remove water or particulate; that is the filter's job.
AirTAC publishes GR regulator flow as curves, not as a single rated figure, so we do not quote a number here. Tell us your port size and the air demand of your circuit, and we will confirm the datasheet flow curve for this exact model on request before you order.
The L in the code marks the low-pressure type, which regulates up to 0.4 MPa - suited to circuits that run gently. If your application needs the standard 0.05-0.9 MPa (7-130 psi) adjustment band, order a GR300-15 without the L code instead; the rest of the decode stays the same.
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.