The ASB-H all-metal construction provides superior environmental resistance, making it ideal for use in environments with welding spatter. The indicator allows the user to easily adjust the flow rate before mounting and operating the cylinder, which helps to reduce setting time and errors. The flow rate can be adjusted using a hexagon wrench tool, which prevents accidental manual operation. The adjustment needle lock nut feature is standard, which prevents unauthorized adjustment and unwanted operation of the needle from the set position due to vibrations or impacts.