HTS Single seated Control Valve with a top-guided valve plug, a compact valve body and an S-shape flow passage which features low pressure loss, large flow capacity, wide rangeability and high accuracy flow characteristics. The design complies with the IEC534-2-1976 standards and the leakage complies with the ANSI B16.104 standards. The compact size and large output force are available when the control valve is combined with multi-spring diaphragm actuator or cylinder actuator. HTS control valve is more suitable for high temperature, low temperature and low pressure drop applications that require reliability and high on-off performance.