Airtac B52-GR Copper-Free Air Source Treatment Unit B52-GR30008NK
The AirTAC B52-GR Copper-Free Air Source Treatment Unit B52-GR30008NK 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, 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 sizePT1/4"
- Regulating range0.05 - 0.9 MPa (7 - 130 psi)
- Pressure typeStandard type
- Pressure gaugeNot fitted
- Reflux valveFitted
- ThreadPT
- BracketFixing bracket included
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac B52-GR Copper-Free Air Source Treatment Unit B52-GR30008NK
GR30008NK is a genuine AirTAC G-series air pressure regulator with a reverse (check) valve fitted: regulation only, with no filter, no bowl and no lubrication function. The 300-size body carries 1/4 inch PT threads and the standard adjusting range of 0.05-0.9 MPa (7-130 psi); maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -20 to 70 C. The N code means no pressure gauge is fitted.
The K code is the difference from the plain GR30008N: a reverse/check valve is built in, the usual choice where downstream pressure must be retained if the upstream supply is interrupted. This is a genuine AirTAC part from the 200 / 300 / 400 / 600 size family, with G (BSPP) and NPT thread options and panel-mount capability. Flow is published as curves, not a single rating, so we confirm datasheet figures on request.
Airtac B52-GR Copper-Free Air Source Treatment Unit B52-GR30008NK Technical Specifications
| Model | Airtac B52-GR Copper-Free Air Source Treatment Unit B52-GR30008NK |
|---|---|
| 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 | 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 B52-GR Copper-Free Air Source Treatment Unit B52-GR30008NK
| 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. |
| 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 | 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 B52-GR Copper-Free Air Source Treatment Unit B52-GR30008NK Is Used
Clamping with pressure retention
Feed clamping cylinders on a fixture where the set pressure must be held if the shop-air supply dips, using the built-in check valve to prevent back-flow out of the circuit.
Pilot supply to process valves
Provide a stable, reduced pilot-pressure feed to pneumatically actuated process valves, with the check valve isolating the pilot line from upstream disturbances.
Machine cylinder supply lines
Regulate the air feeding actuating cylinders on production machinery where an intermittent supply is normal, keeping the downstream circuit charged between cycles.
Is the Airtac B52-GR Copper-Free Air Source Treatment Unit B52-GR30008NK the Right Regulator?
Choose the 300 size with PT1/4 ports when the circuit demand sits at the mid-range port step; step to 200 or 400/600 as your line size requires. Thread is PT as standard with G (BSPP) and NPT as orderable options. Specify the K variant (this model) when you need the reverse/check valve to hold downstream pressure against a supply loss; the same unit without K is GR30008N. The N code deletes the gauge, and a mounting bracket is included as standard.
Flow data appears only as curves in the AirTAC catalogue, so send us your flow requirement and we will confirm sizing from the GR300 datasheet before you commit.
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 B52-GR Copper-Free Air Source Treatment Unit B52-GR30008NK FAQ
AirTAC does not publish a single rated flow number for the GR300 series - performance is given as flow curves. We do not quote a figure we cannot stand behind, so share your flow demand and we will confirm the applicable values from the datasheet on request.
Only the K code. GR30008NK has a reverse (check) valve fitted so downstream pressure is retained if the upstream supply fails; GR30008N is the same 300-size, PT1/4, no-gauge regulator without that valve. Both adjust 0.05-0.9 MPa (7-130 psi).
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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Request a Quote for Airtac B52-GR Copper-Free Air Source Treatment Unit B52-GR30008NK
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.