The long neck cover is normally used for cryogenic valves. Why?

The long neck cover is mainly used to avoid heat transfer from outside to the device. It can keep the packing position away from the liquefied natural gas in the body to ensure the packing temperature above 0℃, avoid freezing stem and cover parts due to the low packing temperature, and ensure the packing working stability.

ZJCLV, one of the cryogenic ball valves manufacturers,it’s cryogenic ball valves use neck bonnet to protect the cryogenic valve stuffing box. For more information click on the website: www.clvvalve.com.