Wafer Soft Sealed Butterfly Valve Description

Wafer Soft Sealed Butterfly Valve‌ is a critical component in industrial pipeline systems for controlling the on/off and flow of media, primarily used in industries such as petroleum, chemical, water treatment, and power generation. Its core structure consists of a valve body, disc, and sealing assembly, with the disc rotating 0°-90° via an actuating mechanism to achieve pipeline shut-off and flow regulation. In the fully open position, the disc aligns parallel to the fluid flow direction to minimize flow resistance.

‌Performance Characteristics‌

‌Sealing Performance‌

‌Zero Leakage‌: Sealing grade meets GB/T 13927-2008 Class V or ISO 5208 Rate A, suitable for water, air, oil, and other media.

‌Corrosion Resistance‌: Seal materials are optional, such as EPDM for acid/alkali resistance, FKM for oil resistance, and PTFE for strong corrosion resistance.

‌Fluid Resistance‌

When fully open, the flow resistance coefficient ζ≈0.5-1.0, with minimal pressure drop. It outperforms gate valves and globe valves, reducing pump energy consumption.

‌Opening/Closing Characteristics‌

‌Double-Eccentric Design‌: The stem deviates from both the disc center and pipeline center, reducing seal friction and lowering operating torque by 30%-50%.

‌Operating Speed‌: Manual type ≤5 seconds, electric type ≤15 seconds, enabling rapid response to system demands.

‌Lifespan & Reliability‌

Soft seal life: ~1-3 years (depending on operating conditions).

Valve body life: ≥10 years.

Operating cycles: ≥100,000 times.

Wafer Soft Sealed Butterfly Valve Specification

Nominal diameter:DN50-200(2"-8")
Nominal pressure: PN6-16,Class150
Disc material:Stainless steel
Connection: Flange
Application fields:Chemical industry

‌Structural Features‌

‌Connection Method‌

‌Wafer-style design‌: Connected between two pipe flanges using double-ended bolts, eliminating the need for additional flange support. This ensures easy installation, particularly in space-constrained scenarios.

‌Valve Body & Disc‌

‌Cylindrical valve body‌: Features a short axial length with an integrated disc.

‌Disc design‌: Typically circular or elliptical, rotating 0°-90° around the stem axis to regulate flow.

‌Sealing Structure‌

‌Soft Sealing‌

Materials: Nitrile rubber (NBR, -40℃~90℃), fluorocarbon rubber (FKM, -20℃~200℃), or PTFE.

Advantages: Excellent sealing performance with minimal leakage, but limited temperature resistance.

‌Innovative Design‌

Combines a flexible T-shaped sealing ring with a multi-layer stainless steel composite structure.

Features a spring-loaded adjusting ring for bidirectional pressure compensation, integrating the benefits of soft and hard sealing for wide-temperature applications.

‌Eccentric Design‌

Some models adopt double or triple eccentric constructions to reduce friction between the disc and seat.

Enables "tighter sealing when closed" functionality, significantly extending service life.