1. Sanitary Butterfly Valve must be manufactured in accordance with the latest version of CJ/T261 "Butterfly Valves for Water Supply and Drainage," which specifies flange-connected eccentric soft-seal butterfly valves.
2. The disc must adopt a streamlined frame structure with a flow channel design.
3. The seal must utilize a self-sealing soft seal, ensuring excellent sealing performance between the disc and seat when closed.
4. The sealing ring must be integrally embedded. This allows for a certain degree of freedom in embedding, allowing for self-adjustment of the seal within a certain range, achieving a bidirectional seal and ensuring zero leakage. The butterfly valve must utilize a reliable, long-lasting, bidirectional sealing structure. The rubber sealing ring of the double-eccentric soft-seal butterfly valve must be integrally embedded in the disc and self-adjustable to ensure a tight, leak-free seal under varying pressures. The sealing surface of the butterfly valve must be free of scratches, cracks, or unevenness.
5. The valve shaft must be equipped with a self-lubricating sleeve, eliminating the need for lubrication during operation. 6. Torque

At the moment of closing and opening the butterfly valve, the operating force applied to the handwheel must not exceed 45kg.

7. Operating Mechanism

A worm gear operator should be used, and its waterproof protection level should meet IP55.

8. Extension

The extension and retraction of the telescopic butterfly valve must be ΔL ≥ 40mm (strictly adhere to this specified extension and retraction length.

Avoid forceful extension to prevent the extension tube from pulling off).