AirTAC GR300-08 Pressure Regulator (GR30008F3K)
The AirTAC AirTAC GR300-08 Pressure Regulator (GR30008F3K) 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 PT1/4" 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.
- TypePressure regulator
- Port sizePT1/4"
- Regulating range0.05 - 0.9 MPa (7 - 130 psi)
- Pressure typeStandard type
- Pressure gaugeFitted
- Reflux valveFitted
- ThreadPT
- BracketFixing bracket included
About the AirTAC GR300-08 Pressure Regulator (GR30008F3K)
The AirTAC GR series is a pure air pressure regulator: it reduces and holds a stable downstream pressure from a compressed air line, with no filter, no drain bowl and no lubricator. This GR30008F3K is the 300 size with a 1/4 in PT port (PT is the standard thread; G and NPT are catalogue options), the standard pressure type with a 0.05-0.9 MPa (7-130 psi) adjustment range, a fitted reverse/check valve that blocks backflow from the downstream side, and an embedded square gauge reading in bar. A mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi), the working temperature range is -20 to 70 C (non-freezing), and the medium is compressed air only.
This is a genuine AirTAC part distributed for the US market. The G-series regulator family is offered in sizes 200, 300, 400 and 600 across a range of port sizes, with a low-pressure type option (up to 0.4 MPa), optional check valve, gauge scale in MPa, psi or bar, G (BSPP) or NPT thread variants, and bracket or panel mounting. Flow capacity is published as curves rather than a single figure, so we confirm the datasheet and flow curve for your exact model on request.
AirTAC GR300-08 Pressure Regulator (GR30008F3K) Technical Specifications
| Model | AirTAC GR300-08 Pressure Regulator (GR30008F3K) |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT1/4" (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 | Fitted — square, bar scale |
| 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 GR300-08 Pressure Regulator (GR30008F3K)
| 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". |
| (blank) | Standard type — 0.05 - 0.9 MPa (7 - 130 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. |
| (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 | GR300 · PT1/4" · 0.05 - 0.9 MPa (7 - 130 psi) |
|---|---|
| One size down | GR200 |
| One size up | GR400 |
| Line order | Filter first, then regulator, then lubricator |
Where the AirTAC GR300-08 Pressure Regulator (GR30008F3K) Is Used
Pneumatic clamp circuits on CNC fixtures
Placed between the machine's air preparation line and the clamp cylinders of a machining fixture, it lets a technician dial in the holding pressure, while the built-in check valve keeps the set pressure if shop air drops.
Pick-and-place gripper supply
Regulates the supply branch feeding gripper cylinders on robotic handling cells, where the 1/4 in port suits compact point-of-use drops and the bar gauge gives a local, readable setpoint.
Packaging machine actuator lines
Sets the operating pressure for small actuator circuits on packaging machinery - seal arms, pushers and diverters - with the check valve protecting the tuned setting against upstream pressure loss.
Is the AirTAC GR300-08 Pressure Regulator (GR30008F3K) the Right Regulator?
Step between sizes 200, 300, 400 and 600 to match the port size and demand of the line - larger sizes carry larger ports and more flow. This unit arrives with the square gauge in bar; other scale options (MPa, psi) and a no-gauge version exist in the family. The fitted K check valve holds downstream pressure if upstream supply drops. Choose PT (standard), G (BSPP) or NPT thread, and a bracket is included for mounting. Because flow is published as curves and not a single rating, send us your line pressure and required downstream flow and we will confirm sizing against the datasheet before you order.
Quick checklist
- ✓ Body size for your peak flow (PT1/4" 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 GR300-08 Pressure Regulator (GR30008F3K) FAQ
AirTAC publishes regulator capacity as flow curves rather than a single rated figure, so there is no one flow number we can honestly quote. Send us your line pressure and required downstream flow and we will read the curve for this exact model from the datasheet and confirm sizing on request.
K means a reverse (check) valve is fitted. It holds the downstream pressure if the upstream supply is shut off or drops, which is useful where a tuned setpoint must be maintained. Models without the K carry no check valve.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
Request a Quote for AirTAC GR300-08 Pressure Regulator (GR30008F3K)
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.