The AirTAC GR30008LJF2T AirTAC Low-Pressure Regulator NPT1/4 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 PT1/4" 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.
GR30008LJF2T is an AirTAC GR300 air pressure regulator, a regulation-only unit: it sets and holds downstream air pressure and contains no filter, no bowl and no lubricator. This configuration is the low-pressure type, with an adjustment range of up to 0.4 MPa, and is built for a 1/4 in NPT port (NPT1/4) in the 300 size. It carries an embedded square gauge with a psi scale (an external round gauge is available as an option), is supplied without a mounting bracket (the GR is also panel-mountable), and has no reverse/check valve fitted. Maximum working inlet pressure is 1.0 MPa (145 psi) and the operating 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 (MPa, psi or bar), thread form and bracket option. Flow for this regulator is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet and sizing figures for your application on request.
| Model | GR30008LJF2T AirTAC Low-Pressure Regulator NPT1/4 |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT1/4" (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, psi 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. |
|---|---|
| 08 | Port size PT1/4". 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. |
| 2 | Gauge scale: psi. 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 · PT1/4" · 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 carton-sealing or case-packing line, soft clamp arms and hold-down pads must be pressed with a gentle, steady force. This low-pressure regulator holds the downstream setting in the circuit feeding those clamp cylinders, so parts are secured without crushing.
In a quality lab or test bench where pneumatic fixtures and low-pressure actuators need a stable, modest supply pressure, the regulator sets the working pressure at the bench, and the psi-scale gauge gives technicians a direct local readout.
On textile winding, fabric spreading or film converting equipment, rollers, spreader bars and tension arms are actuated with light air pressure. This regulator maintains the low set point those mechanisms need, protecting delicate material from excess force.
Start with the port and size step: the 300 size with a 1/4 in port suits circuits where line size and required flow call for that step; larger sizes (400, 600) move up in port and flow capacity, and the flow curves rather than a single rating are the honest basis for that choice. This unit is the L (low-pressure) type, rated for adjustment up to 0.4 MPa - choose the standard GR type if your set point needs the full 0.05-0.9 MPa range. The fitted square gauge here reads in psi; MPa and bar scales are alternatives. Thread is NPT on this code; PT is the standard form and G (BSPP) is also an orderable option. No bracket is included on this code (J), and a reverse/check valve is not fitted. Because flow is published as curves, not a single rating, 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 figure, so we do not quote a rated flow number. Tell us your inlet pressure, set point and the flow your circuit needs, and we will confirm the sizing from the datasheet curves on request before you order.
L 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. Choose this version when your process only needs lower set pressures; choose the standard type when you need the full range. This unit is otherwise a regulation-only GR: no filter, no bowl and no lubricator.
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.