Wich side is in on the air?

The air source is on the left as you face the meter. The flow is left to right. If you look closely at the video, you'll see an arrow on the bottom at the inlet side.

Can the air pressure be set before air flows?

Yes, it can be set before air flows to the output. But the inlet needs to be pressurized to see where it's set as the only indication of the setting is what is read from the gauge.

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SNS AR4000-N04 Female Thread 1/2 NPT Air Pressure Regulator 0-150 PSI Adjustable,Bracket,Gauge

Product ID: 394788127

Details

Brand
SNS
Exterior finish
Aluminum
Inlet connection type
National Pipe
Material
Aluminum
Outlet connection type
FNPT

💨211.9 SCFM max airflow for high efficiency

🔩1/2" NPT female thread for universal fit

🌡️Operates smoothly from 5 to 60℃

Description

⚙️ Master your airflow with precision and power!

HIGH FLOW CAPACITY - Supports up to 211.9 SCFM (6000 L/min) for demanding pneumatic systems
CERTIFIED QUALITY SAFETY - Meets top industry standards (ANSI, ISO 9001, UL) for peace of mind and compliance
PRECISION PRESSURE CONTROL - Easily adjust pressure with intuitive rotary knob for flawless airflow management
WIDE OPERATING TEMPERATURE - Reliable function across 41-140℉, perfect for diverse work environments
ROBUST ALUMINUM ALLOY BUILD - Durable, lightweight design ensures long-lasting performance and corrosion resistance

The SNS AR4000-N04 is a premium 1/2" NPT female thread air pressure regulator crafted from durable aluminum alloy. It delivers precise pressure adjustments up to 150 PSI with a high flow rate of 211.9 SCFM, operating reliably between 5 and 60℃. Certified to rigorous industry standards, it’s engineered for professionals demanding consistent, efficient pneumatic control.

Specifications

ASIN	B08B3S1WDX
ASIN	B08B3S1WDX
Brand Name	SNS
Connector Type	Threaded
Customer Reviews	4.4 4.4 out of 5 stars (136)
Customer reviews	4.4 4.4 out of 5 stars (136)
Date First Available	20 March 2021
Exterior Finish	Aluminum
Inlet Connection Type	National Pipe Tapered
Item model number	AR4000-N04
Manufacturer	China SNS pneumatic Co.,Ltd
Manufacturer	China SNS pneumatic Co.,Ltd
Manufacturer Part Number	AR4000-N04
Material Type	Aluminum
Maximum Pressure	150 Pound per Square Inch
Model Number	AR4000-N04
Number of Items	1
Number of Packs	1
Number of Ports	2
Outlet Connection Size	0.5 Inches
Outlet Connection Type	FNPT
Package Dimensions	21.4 x 12.7 x 8.3 cm; 1.01 kg
Size	AR4000-N04
Specification Met	ANSI B1.20.1, ANSI B16.11, API 609, ASSE, ASTM, CE, CSA, EPA, FM, IAPMO, ISO 9001, MSS SP 25, MSS SP 67, MSS SP 72, MSS SP 80, NEMA, NSF, OSHA, RoHS, UL, UPC, WQA, WaterSense
Thread Size	1/2
Thread Type	Threaded
Unit Count	1.0 Count
Valve Type	Needle Valve

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