Share(1) Scene Problems
1. Risk of Low-Temperature Brittleness: In cryogenic environments, ordinary metal materials become brittle and hard, making them prone to fracture. This can damage the valve and cause serious safety accidents.
2. Difficulty in Maintaining Sealing Performance: Low temperatures can cause sealing materials to harden and contract, leading to a decline in sealing performance and potential leakage of the medium.
3. Stress Issues Caused by Cold Shrinkage: Valve components may experience varying degrees of cold shrinkage in cryogenic conditions, which can increase the clearance between parts and affect the normal operation of the valve.
(2) Shanghai Rogers Butterfly Valve Technology and Features
1. Selection of Cryogenic Materials: Key components such as the valve body, bonnet, and stem are made from materials with good cryogenic properties, such as austenitic stainless steel or aluminum alloy. These materials maintain good toughness and strength in cryogenic environments and do not become brittle and fracture.
2. Cryogenic Sealing Technology: The sealing surface uses a layered soft filling material (e.g., stainless steel bellows + PTFE), which maintains good elasticity at low temperatures and closely conforms to the valve seat to ensure sealing performance. The sealing structure design also considers contraction compensation due to temperature changes, employing a multi-layered soft composite sealing structure to adapt to changes caused by cold shrinkage.
3. Stress Elimination Design: The valve structure uses a special flexible connection method. For example, the stem and plate are connected with a floating joint, allowing some displacement space for components during cold shrinkage at low temperatures, reducing the generation of stress.
(3) Solutions to Pain Points
1. The use of cryogenic materials ensures that the valve will not be damaged by brittle fracture in cryogenic environments, enhancing system safety.
2. Cryogenic sealing technology ensures the sealing performance of the valve under cryogenic conditions, preventing leakage of media such as liquid oxygen and liquid nitrogen, and avoiding potential safety risks and material loss.
3. The stress elimination design addresses stress issues caused by cryogenic conditions, ensuring the normal operation and long-term reliability of the valve.
