DD343F Soft Seal Low Temperature Flange Butterfly Valve Features
1. Anti-Freezing Extended Bonnet Design: The extended bonnet structure effectively lengthens the cold conduction path, keeping the stuffing box in a relatively higher temperature zone. This prevents packing freeze-up and valve stem seizure, ensuring flexible and reliable operation.
2. Deep Cryogenic Treatment and Low-Temperature Materials: All critical components undergo deep cryogenic treatment to relieve stress. The chemical composition and low-temperature impact toughness of the materials are strictly controlled to ensure low-temperature toughness and dimensional stability at -196°C, preventing brittle fracture, deformation, and leakage at cryogenic temperatures.
3. Reliable Sealing with Triple Eccentric Structure: The triple eccentric sealing structure ensures almost no wear between the seat and the disc, providing a "tighter-as-pressure-increases" sealing function. The sealing ring is made of stainless steel or PTFE, combining the advantages of both metal hard sealing and elastic sealing.
4. Convenient Installation with Flanged Connection: The standard flanged connection facilitates easy installation and disassembly, allowing efficient connection with various low-temperature equipment and pipelines. It is suitable for a wide range of sizes from DN50 to DN1000.5. Excellent Flow Regulation Performance: The flow characteristic tends to be proportional, offering good regulation performance. Flow can be adjusted arbitrarily within the 0 to 90-degree rotation range, allowing the valve to function as both a shut-off valve and a control valve