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Premium Control Valves for HVAC and Water Systems - CE ISO Certified. Self-Operated Pilot Control: No external power required; uses pilot-guided diaphragm for automatic pressure regulation. Zero Leakage Design: Bubble-tight sealing ensures no media escape under rated pressure conditions. Anti-Water Hammer Protection: Slow-closing mechanism protects pipelines from hydraulic shock and pipe bursts. Corrosion-Resistant Materials: Suitable for harsh environments including sewage, wastewater, and industrial drainage. Modular Maintenance Design: Pilot tubing and diaphragm can be serviced without removing valve from pipeline. Wide Customization Options: Customized flange standards and material options (SS304/SS316/WCB) available.