Soft Sealed Flange Butterfly Valves – Reliable Flow Control for Water and Utility Systems

When it comes to fluid control in municipal, industrial, and utility piping systems, soft sealed flange butterfly valves offer a practical combination of tight sealing, simple operation, and cost efficiency. Shengshi Chemical’s soft sealed flange butterfly valve is engineered to deliver consistent performance, particularly in water supply networks and similar low to medium-pressure systems.

Designed for Leak-Free Operation

At the heart of this valve is a soft sealing structure, where the edge of the butterfly plate is coated with rubber or PTFE (polytetrafluoroethylene). These elastic materials adapt to irregularities on the sealing surface, creating a tight, resilient seal. This ensures either zero leakage or extremely low leakage, even under fluctuating pressure or temperature conditions.

Sturdy Flange Connection

The valve uses a flange connection method, where bolts securely fasten the valve to the pipeline flange. This rigid structure ensures long-term stability, minimizes vibration during operation, and enhances sealing reliability—critical in pressurized systems handling water, steam, air, or light chemicals.

Flexible Operation & Broad Application

With a 90° rotation of the butterfly plate around the valve stem, the valve can open, close, or regulate flow efficiently. It is compatible with multiple actuation methods—manual, electric, or pneumatic—making it easy to integrate into automated pipeline systems.

Technical Highlights:

· Nominal Diameter: DN40 – DN1200

· Pressure Rating: PN1.0MPa – PN16.0MPa

· Temperature Range: -20℃ to 200℃ (depending on seal material)

· Applicable Media: Water, air, steam, oil, acid and alkali solutions

· Body Materials: Ductile iron, carbon steel, stainless steel

· Sealing Materials: Rubber, PTFE

· Standards: ANSI, ISO, GB

For water supply lines and general utility applications, the Shengshi soft sealed flange butterfly valve offers excellent value with high performance. Its combination of durable construction, excellent sealing, and broad material compatibility makes it a trusted solution in modern fluid control systems.