The AirTAC GR30010LF3T AirTAC Low-Pressure Regulator, NPT3/8 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 PT3/8" 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 GR30010LF3T is an AirTAC GR-series air pressure regulator: it does one job, holding a stable downstream air pressure from a compressed-air supply. This configuration is the 300 size with a 3/8 in NPT port, built as the low-pressure type with an adjustment range up to 0.4 MPa, and it carries an embedded square gauge scaled in bar so the set pressure is readable at the unit. It also has a reverse/check valve position unfitted, a mounting bracket included, and it is panel-mountable. 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 or low-pressure types, with a choice of gauge scale (MPa, psi or bar), optional round external gauge, no-gauge and no-bracket variants, and PT, G or NPT threads. Because flow is published as curves rather than a single rating, we confirm the datasheet and sizing figures on request.
| Model | GR30010LF3T AirTAC Low-Pressure Regulator, NPT3/8 |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT3/8" (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. |
|---|---|
| 10 | Port size PT3/8". 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 · PT3/8" · 0.05 - 0.4 MPa (7 - 58 psi) |
|---|---|
| One size down | GR200 |
| One size up | GR400 |
| Line order | Filter first, then regulator, then lubricator |
Sealing jaws and light clamping cylinders on a packaging line often run at gentle setpoints well below normal line pressure. This low-pressure GR regulator holds that reduced, stable setting downstream of the main plant regulator, with the bar-scale square gauge letting an operator read the set value at a glance.
Blow-off and air-knife nozzles over a conveyor usually need a moderate, repeatable pressure rather than full line supply. Feeding them through this 3/8 in NPT regulator lets the line set the exact blowing pressure for the product, and the check-valve-free standard body keeps the circuit simple.
Test benches and lab rigs that pressurise fixtures or instruments at low pressures need a regulator that can be set precisely and read easily. The low-pressure adjustment range up to 0.4 MPa and the embedded bar gauge make this unit a straightforward bench-side pressure control, and the wider -20 to 70 C range suits unheated rooms.
Start with the port step: sizes 200 to 600 step from 1/8 in up to 1 in, and the 300 size with its 3/8 in port sits in the middle of the range - match the size to the pipe and the air demand of the circuit. Then pick the regulator type: this low-pressure (L) version adjusts up to 0.4 MPa, so it suits circuits set well below the standard 0.05-0.9 MPa range; if you need settings above 0.4 MPa, choose the standard GR type instead. Choose the gauge scale to suit the operators - this unit reads bar on the embedded square gauge, with MPa or psi scales and an optional external round gauge available. Thread is a real choice: PT is the standard, while G (BSPP) and NPT (as on this code) are catalogue options to order. Brackets are included by default (a J code removes them), and GR is also panel-mountable. One honest note on sizing: flow is published as curves, not a single rated figure, so ask us to confirm sizing against your application before ordering.
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 regulator flow as curves, not as a single rated number, so there is no one flow figure we can honestly quote for this 300-size, 3/8 in port unit. Tell us your application and we will confirm the flow and sizing data from the datasheet on request.
The L in the code marks the low-pressure type: its adjustment range goes up to 0.4 MPa instead of the standard GR range of 0.05-0.9 MPa. It is the right pick for circuits that are set well below normal line pressure; for settings above 0.4 MPa, order the standard type instead. Maximum inlet pressure is still 1.0 MPa (145 psi).
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.