Performance and characteristics Use the tight bivalve clack structure with smaller unbalanced force. Be used in the heating (air-conditioning) system to keep pressure differentials of the control system constant. Characteristics are as followed: 1. Keep pressure differentials of the controlled system constant. 2. Support internal automatic adjustment of the controlled system. 3. Absorb fluctuation of the external differential pressure. 4. With the advanced stepless voltage regulation structure,the controlling differential pressure rangeability can reach 25:1. 5. Use efferent structure to eliminate blockage online. 6. The automatic valve core is wing-oriented and could be anti-lock. 7. Differential pressure adjuster is equipped with a differential pressure scale which is convenient for differential pressure adjustment. 8. The access hole in the valve core enables online trouble shooting without disassembling the valve. 9. Large Kvs and small resistance in full-open…