1,Small in size,light in weight. 2,Beautiful appearance. 3,Excellent function. 4,Fast delivery. Product parameters: nominal diameter:50--300MMnominal pressure:1.0/1.6MPaworking temperature:-45°C--150°Csuitable mediums:water,sewage,oils,acids,alkalisProduct Characters:1, Excellent regulation performance.2, Different materials can be available for various mediums.3, Quick 90°on-off operation, ...