The AirTAC GR30015LF3T AirTAC Regulator NPT 1/2 in Low-Pressure Type 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 GR30015LF3T is an AirTAC GR-series air pressure regulator: it does one job, holding a steady downstream pressure from a compressed-air supply. This 300-size unit has a 1/2 in NPT port, and the L in the code marks it as the low-pressure type, so its regulated output can be set anywhere up to 0.4 MPa. It is supplied with an embedded square gauge scaled in bar (an external round gauge is available as an option), includes a mounting bracket, and can also be panel-mounted. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -20 to 70 C, wider than the rest of the G family.
This is a genuine AirTAC part. The GR line spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, in standard and low-pressure types, with your choice of gauge scale and thread (PT standard, G or NPT to order). Flow figures are published as curves rather than a single rating, so ask us to confirm sizing against your application before ordering.
| Model | GR30015LF3T AirTAC Regulator NPT 1/2 in Low-Pressure Type |
|---|---|
| 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 | 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. |
| (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. |
| (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 horizontal form-fill-seal machine, sealing jaws and film tension cylinders need a gentle, steady air setting rather than full line pressure. This low-pressure GR regulator holds that setting on the 1/2 in supply branch feeding the sealing module.
Air-jet looms and textile finishing lines run long shifts on carefully set air pressures. A GR300 regulator on the machine's 1/2 in inlet lets the mill set and hold the working pressure the process was commissioned at, with the bar-scale gauge readable at a glance.
Workholding clamps on a machining centre need a fixed, repeatable pressure so parts are held consistently from cycle to cycle. This regulator, set once and locked by the operator, conditions the 1/2 in branch feeding the fixture's clamping circuit.
Pick the GR size by the port and flow step you need: 200 for 1/8-1/4 in lines, 300 for 3/8-1/2 in, 400 for 1/2-3/4 in, and 600 for larger supplies. This unit is the low-pressure (L) type, correct where the process needs a setting below the standard range ceiling of 0.4 MPa; choose the standard GR type if you need settings up to 0.9 MPa. Gauge scale is selectable (MPa, psi or bar) and this code carries the square gauge in bar. Thread is PT as the AirTAC standard, with G (BSPP) and NPT as order options - this code is NPT. A bracket is included, and GR can also be panel-mounted.
Because flow is published as curves rather than a single rated figure, we cannot quote one number here. Send us your line size and demand and we will confirm the right GR300 sizing from the datasheet before you order.
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 flow as curves on the datasheet, not as a single rated number, so we do not state a flow figure here. Tell us your line size and air demand and we will confirm from the datasheet whether this 300-size, 1/2 in NPT regulator is correctly sized for your application before you order.
L marks the low-pressure type: the regulated output can be set anywhere up to 0.4 MPa. A standard GR (no L in the code) covers the full 0.05-0.9 MPa range. Both share the same 1.0 MPa maximum inlet pressure, so choose the L type when your process setting sits in the lower band and the standard type when you need to regulate higher.
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.