GEMÜ 8257

The GEMÜ 8257 2/2-way solenoid valve with a positive lift diaphragm provides electromagnetically operated flow isolation for inert gaseous and liquid media. The GEMÜ 8257 accommodates the DN 10 nominal size, regulates operating pressures from 0 to 10 bar, and withstands extreme media temperatures ranging from -10°C to 150°C. Key Performance Capabilities: Vacuum and Low Pressure Reliability: The GEMÜ 8257 force-controlled solenoid valve operates without requiring a minimum pressure differential, guaranteeing secure flow isolation in vacuum applications and preventing process downtime during low pressure system start-ups. Material Integration: The GEMÜ 8257 integrates a CW617N brass or 1.4408 stainless steel body with NBR, HNBR, FKM, or EPDM seals, preventing chemical degradation and lowering long term replacement costs in corrosive liquid or high temperature steam lines up to 150°C. Pipeline Infrastructure Protection: The GEMÜ 8257 positive lift diaphragm engineering ensures a soft closing action, mitigating fluid hammer effects to protect surrounding process equipment from mechanical damage and costly emergency repairs. Safety & Compliance: Explosive Environment Security: The GEMÜ 8257 ATEX version holds II 2G Ex eb mb IIC T3 Gb gas and II 2D Ex mb tb IIIB T135°C-150°C Db dust certifications, preventing electrostatic ignition risks to guarantee facility safety within volatile industrial zones. International Operational Standards: The GEMÜ 8257 achieves EAC conformity and features an IP65 protection class plug, ensuring plant engineers can standardise one process valve assembly across internationally compliant automated networks. Note: The maximum operational media temperature and operating pressure ranges depend strictly on the selected seal material and specific body configuration for the GEMÜ 8257.