AirTAC GR400-15 Pressure Regulator (GR40015NK)
The AirTAC AirTAC GR400-15 Pressure Regulator (GR40015NK) is a genuine G-series air pressure regulator. It holds a stable downstream pressure over the range 0.05 - 0.9 MPa (7 - 130 psi) with PT1/2" ports, ordered without a 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.
- TypePressure regulator
- Port sizePT1/2"
- Regulating range0.05 - 0.9 MPa (7 - 130 psi)
- Pressure typeStandard type
- Pressure gaugeNot fitted
- Reflux valveFitted
- ThreadPT
- BracketFixing bracket included
About the AirTAC GR400-15 Pressure Regulator (GR40015NK)
The AirTAC GR40015NK is a genuine AirTAC G-series air pressure regulator: it reduces and holds downstream pressure only - no filter, no bowl, no lubricator. The standard type covers an adjustment range of 0.05-0.9 MPa (7-130 psi). The K in the code means a reverse (check) valve is fitted, so downstream air is held rather than venting back through the regulator if the upstream supply is lost. The 400 size gives a PT1/2 port as the standard thread (PT, BS 21 taper), a bracket is included, and no gauge is fitted (N).
It is a genuine AirTAC part from the GR400 size family, which steps up in port and flow capacity. Gauged variants (embedded square gauge in MPa, psi or bar scale, or external round gauge) and G/NPT thread options are available. AirTAC publishes regulator flow as curves rather than a single rated figure, so we confirm flow and datasheet figures against your application on request.
AirTAC GR400-15 Pressure Regulator (GR40015NK) Technical Specifications
| Model | AirTAC GR400-15 Pressure Regulator (GR40015NK) |
|---|---|
| Series | GR400 pressure regulator |
| Port size | PT1/2" (PT thread) |
| Regulating range | 0.05 - 0.9 MPa (7 - 130 psi) |
| Pressure type | Standard type |
| Bracket | Fixing bracket included |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -20 to +70 °C |
| Pressure gauge | Not fitted |
| Reflux valve | Fitted (reverse flow permitted) |
| 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.
Model Code: AirTAC GR400-15 Pressure Regulator (GR40015NK)
| 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". |
| (blank) | Standard type — 0.05 - 0.9 MPa (7 - 130 psi). Blank is standard, L is the low-pressure type. |
| (blank) | Fixing bracket included. |
| N | No pressure gauge (N). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | PT thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
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.
Size Class
- GR200PT1/8" - PT1/4"
- GR300PT1/4" - PT1/2"
- GR400PT3/8" - PT1/2"
- GR600PT3/4" - PT1"
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 - 0.9 MPa (7 - 130 psi) |
|---|---|
| One size down | GR300 |
| One size up | GR600 |
| Line order | Filter first, then regulator, then lubricator |
Where the AirTAC GR400-15 Pressure Regulator (GR40015NK) Is Used
Pneumatic clamp holding
Fixture clamps on a machining cell must stay closed if the plant air dips. With the built-in check valve, this regulator lets the clamped circuit hold its regulated pressure through an upstream drop instead of relaxing mid-cycle.
Bagging machine hold-down
Bagging and form-fill-seal machines use hold-down cylinders that should not lose pressure between strokes. The half-inch regulated feed with reverse valve keeps the hold circuit charged even when the header pressure sags at peak demand.
Air-spring press tooling
Air springs and pneumatic cushions under a press platen need a constant, held pressure for repeatable cushioning. This regulator with check valve on the 1/2-inch supply keeps the cushion circuit at set pressure and stops it back-venting if the supply is interrupted.
Is the AirTAC GR400-15 Pressure Regulator (GR40015NK) the Right Regulator?
Use the 400 size / PT1/2 port on half-inch headers; other GR400 port sizes cover different flows. The standard range of 0.05-0.9 MPa (7-130 psi) suits most circuits - the low-pressure L type caps at 0.4 MPa. Choose this K version over the plain GR40015N when the downstream circuit must hold its set pressure if upstream supply fails, avoiding a separate check valve in the line. Gauge deleted (N); gauged variants with MPa, psi or bar scale exist. Bracket included; thread is PT standard, with G (BSPP) and NPT as order options.
Flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
Quick checklist
- ✓ Body size for your peak flow (PT1/2" here)
- ✓ Standard 0.9 MPa or low-pressure 0.4 MPa
- ✓ Gauge fitted, or order N without
- ✓ Gauge shape C round / F square
- ✓ Scale MPa (1), psi (2) or bar (3)
- ✓ Reflux valve needed, order K
Installation & Maintenance Notes
- check Install downstream of the filter, following the airflow arrow.
- check Keep inlet pressure at or below 1.0 MPa (145 psi).
- check Set pressure while air is flowing, then lock the knob.
- check Adjust within 0.05 - 0.9 MPa (7 - 130 psi) only.
- check Operating range -20 to +70 °C.
- check Panel-mount or use the fixing bracket; do not hang it on tubing.
The reflux valve lets air flow back through the regulator, which is useful when downstream volume must vent quickly. A regulator does not remove water or particulate; that is the filter's job.
AirTAC GR400-15 Pressure Regulator (GR40015NK) FAQ
AirTAC publishes GR regulator flow as curves rather than a single rated figure, so we cannot honestly quote one number. Send your inlet pressure, set pressure and air demand, and we will confirm the sizing from the datasheet curves before you order.
K means a reverse (check) valve is fitted: air can pass out to the circuit but not back through the regulator, so the downstream side holds its pressure if upstream supply drops. Function, range (0.05-0.9 MPa), PT1/2 port, bracket and no-gauge build are otherwise the same as the plain GR40015N.
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Request a Quote for AirTAC GR400-15 Pressure Regulator (GR40015NK)
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.