KHSC electric sleeve single-seat adjusting valve used in fields of high pressure and flash cavitation, is a single-seat adjusting valve of high performance, solid sleeve not effected by steam and cavitation of valve. Impact structure, S streamlined access, make small loss of pressure drop, large flow, wide adjustable range. Large area of valve spool guide, good anti-vibration. Leakage of adjusting valve according to ANSI B16.104 standard. Adjusting valve equipped with multi-spring diaphragm actuator, impact structure, large output force, product according to GB/T4213-92