The AirTAC GR40015LF3T AirTAC Air 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 GR40015LF3T is an AirTAC GR400-series air pressure regulator for compressed air, built around pressure regulation only - no filtration and no lubrication. This is the 400 size with 1/2 in NPT ports, configured as the low-pressure type, so the regulated outlet can be set anywhere up to 0.4 MPa while the unit accepts a maximum inlet pressure of 1.0 MPa (145 psi). A square pressure gauge with a bar scale is fitted as standard, and the operating temperature range is -20 to 70 C, wider than the rest of the G-series family. A mounting bracket is included, and the GR400 can also be panel-mounted.
This is a genuine AirTAC part. The GR400 family is the 400 size of the GR regulator line, with port options stepping up from smaller sizes and thread choices of PT (standard), G (BSPP) or NPT, plus gauge scale options of MPa, psi or bar. Because AirTAC publishes regulator flow as curves rather than a single rated figure, we confirm the flow and datasheet figures for your application on request - just ask before ordering.
| Model | GR40015LF3T AirTAC Air Pressure Regulator NPT1/2 |
|---|---|
| Series | GR400 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.
| GR400 | G-series pressure regulator, 400 body — sets the port range. |
|---|---|
| 15 | Port size PT1/2". This body offers 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 | GR400 · PT1/2" · 0.05 - 0.4 MPa (7 - 58 psi) |
|---|---|
| One size down | GR300 |
| One size up | GR600 |
| Line order | Filter first, then regulator, then lubricator |
Set a gentle, stable downstream pressure for spray guns and air-assisted applicators on a finishing line, where the coating process calls for a controlled outlet well below full line pressure.
Hold workpieces on a milling or drilling fixture with a low regulated air pressure that grips securely without over-clamping delicate or finished surfaces.
Feed positioners and valve-actuator pilot circuits on a process skid, where control components need a reduced, steady supply pressure from a plant air header.
Sizing a GR regulator starts with the port step: the 400 size with 1/2 in ports is the right choice when your line runs larger piping and higher air demand than the 200 or 300 sizes, but the final check should always be against the flow curve for your actual consumption - we confirm that from the datasheet on request. This unit is the L (low-pressure) type, so choose it when your process needs a controlled outlet anywhere up to 0.4 MPa rather than the standard regulator range. The fitted square gauge reads in bar; MPa and psi scales are catalogue options if you prefer a different scale. Thread is NPT on this code, with PT as the standard and G (BSPP) available to order. A mounting bracket is included, and the GR400 is also panel-mountable if you want it fixed into a control cabinet or manifold plate.
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 rather than a single rated figure, so there is no one flow number we can honestly quote for this unit. The right figure depends on your inlet pressure, set outlet pressure and allowed pressure drop. Tell us your operating conditions and we will confirm the flow from the datasheet for your application before you order.
L marks the low-pressure type of the GR400 regulator. On this configuration the regulated outlet can be set anywhere up to 0.4 MPa, which suits processes that need a gentle controlled pressure. The unit still accepts a maximum inlet pressure of 1.0 MPa (145 psi), and the fitted square gauge reads the outlet pressure in bar.
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.