
Hydraulic Proportional Control Valve Factory China for Municipal Water Projects. 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 Feature: Slow-closing mechanism protects pipelines from hydraulic shock and bursts. 100% Pressure Tested: Every valve undergoes shell and seat pressure testing per ISO 5208 standard. 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. OEM/ODM Service Available: Support for technical drawing requests (PDF/CAD) and design-based customization.