The main reason for cryogenic valves to use enlarged cover
The use of low temperature valve is an indispensable device in the current low temperature pipeline system, and when it comes to the adjustment and utilization of this valve, it makes the flow of the pipeline medium more rapid and more stable. This IS VERY IMPORTANT, AND WHEN IT COMES TO CRYOGENIC VALVES, IN CRYOGENIC ENVIRONMENTS, THE VALVE DESIGN NEEDS TO BE MORE "DEMANDING" THAN AT ROOM TEMPERATURE. Here are the main reasons WHY CRYOgenic valves use an expanded cover.

The long neck cover has the function of protecting the packing box of the low temperature valve, because the sealing of the packing box is one of the key of the low temperature valve. If the stuffing box leaks, it will reduce the cooling effect and lead to the gasification of liquefied gas. At low temperature, with the decrease of temperature, the elasticity of packing gradually disappears, and the leak-proof performance decreases. Due to the media leakage, the packing and the valve stem are frozen, which affects the normal operation of the valve stem. At the same time, the pulp packing is scratch due to the movement of the valve stem up and down, causing serious leakage. Therefore, it is necessary to ensure that the temperature of the filler base is above 8 ° C. Bonnet CAN BE EXTENDED TO ACCOMMODATE LOW TEMPERATURE, HIGH TEMPERATURE OR PIPE INSULATION THICKNESS. The EXTENDED COVER CAN BE USED TO ACCOMMODATE THE BELLOWS SEAL WITH THE STUFFING BOX REMOVED, WHICH IS THE MAIN REASON FOR THE CURRENT EXPANSION OF CRYOGENIC VALVE COVERS.

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