What do you mean "pull down on the knob. it should move 3mm (1/8") or so. then it will be very easy to turn.". how do you pull down on the knob?

The knob can lock in place to keep your setting. You simply pull the knob away from the valve to unlock it. Most users will install with the knob pointing down, hat is why they said pull down. Very good product, you will like it.

Can the oil supply cup be removed when oiling is not required for use with a plasma cutter?

No, it cannot, there. is air air pressure through the unit any time the supply is on. If you’re talking about just the oil cup, you could clean it out and and re-install to to use with a plasma cutter. Good luck!

Ok, so are you supposed to add water to this filter? I'm a little confused about how this is supposed to work.

No you are not supposed to add water. The clear part on the bottom of this regulator is to collect moisture in the air running through it. You then press the brass release on the bottom to drain any water that is collected.

Can I use it for my airbrush work, t shirts , hats etc?

It will take 125 psi air and dial it down to 0 psi. I needed 2 to 5 psi for my application. I would think it would work.

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Air Pressure Regulator with Gauge Mini Air Control Valve 1/4-Inch NPT Thread for Air Compressor and Air Tools (0-145PSI)

Air Pressure Regulator with Gauge Mini Air Control Valve 1/4-Inch NPT Thread for Air Compressor and Air Tools (0-145PSI)

Product ID: 376774917

📏Compact 1/4-inch NPT thread

⚙️Precise 0-145 PSI control

🛠️Durable aluminum alloy body

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175.73 DT

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡️ Take control of your air power like a pro — precision meets durability!

BUILT TO LAST - Robust aluminum alloy body with steel bracket ensures stability and durability under pressure.
LEAK FREE CONFIDENCE - Engineered for near-zero air leakage, maximizing efficiency and tool lifespan.
EFFORTLESS INSTALLATION - Lightweight design with easy install/remove feature saves you time on every project.
UNIVERSAL COMPATIBILITY - Fits standard 1/4-inch NPT threads, perfect for compressors, spray guns, and all your pneumatic tools.
PRECISION PRESSURE MASTERY - Maintain exact air pressure for flawless tool performance every time.

The ZHONG AN AIR TOOLS Air Pressure Regulator with Gauge offers precise air pressure control from 0 to 145 PSI, featuring a durable aluminum alloy body and steel bracket for stability. Compact and lightweight with a 1/4-inch NPT thread, it ensures near-zero leakage and easy installation, optimizing the performance and longevity of your pneumatic tools.

Specifications

ASIN	B07BRLXHHK
ASIN	B07BRLXHHK
Batteries Included?	No
Batteries Required?	No
Best Sellers Rank	#81,029 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #209 in Air Compressor Accessories
Color	Pressure Regulator and Gauge With Bracket
Customer Reviews	4.3 4.3 out of 5 stars (522)
Customer reviews	4.3 4.3 out of 5 stars (522)
Date First Available	4 September 2018
Date First Available	4 September 2018
Included components	1* air pressure regulator, 1* pressure guage, 1* metal bracket
Is Discontinued By Manufacturer	No
Item Package Quantity	1
Item Weight	200 g
Item model number	ZAT005
Item model number	ZAT005
Manufacturer	ZHONG AN AIR TOOLS
Manufacturer	ZHONG AN AIR TOOLS
Material	Aluminum
Noise Level	0.01 Decibels
Part number	ZAT345
Power source type	air-powered
Product Dimensions	3.99 x 7.62 x 7.49 cm; 200 g
Product Dimensions	3.99 x 7.62 x 7.49 cm; 200 g
Size	1/4" Air Regulator
Temperature Range	40-140 Degrees Fahrenheit

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