Three-Piece Weld-End Sanitary Stainless Steel Butterfly Valve

This specification describes a Three-Piece Weld-End Sanitary Stainless Steel Butterfly Valve, designed for secure, permanent installation in hygienic pipeline systems. This valve is primarily used for isolation ( $\text{ON}/\text{OFF}$ control) in the Food, Pharmaceutical, and related industries where cleanliness and corrosion resistance are essential.

The three-piece design is notable for allowing the main valve body section to be easily removed from the pipeline for inspection or maintenance without disturbing the welded-in end connections.

⚙️ Technical Specifications

Parameter	Specification	Detail
Product Name	Three-Piece Weld-End Sanitary Butterfly Valve	三片式焊接蝶阀
Nominal Size (Example)	$\text{15}\,\text{cm}$ ( $\text{DN}150$ )	Example size; typically available in standard $\text{DN}$ and $\text{OD}$ sizes.
Nomeral Pressure ( $\text{PN}$ )	$\text{1.6}\,\text{bar}$	Low-pressure service rating.
Connection Type	Weld-End	Provides a permanent, secure, and crevice-free connection to sanitary tubing.
Drive Method	Manual (Manual Handle)	Operated by a multi-position handle or lever.
Channel Position	Straight-Through	Standard linear flow path.
Material	Stainless Steel	Typically $\text{SS}304$ or $\text{SS}316\text{L}$ (must be confirmed for exact application).
Application Scope	Food, Pharmaceutical, etc.	Hygienic applications.
Customization	No	Standard, off-the-shelf product configuration.
Packaging	Carton Box	Standard commercial packaging.

⭐ Key Design Features and Sanitary Advantages

Three-Piece Structure:
- The valve consists of two welded end pieces and a central body piece that houses the disc and seat.
- Advantage: Allows the central operating section to be easily disassembled and removed from the line for comprehensive inspection, seal replacement, or maintenance without cutting the pipeline.
Weld-End Connection:
- Provides a permanent, fully hygienic, and seamless joint with the sanitary pipework.
- Eliminates the need for gaskets and clamps at the connection points, minimizing potential external leak paths and dead legs.
Hygienic Material & Finish:
- Constructed from Stainless Steel, offering excellent corrosion resistance to process media and cleaning solutions.
- The internal surface finish is polished to a sanitary $\text{Ra}$ value (implied) to prevent microbial growth.
Straight-Through Flow:
- The valve offers minimal obstruction and low pressure drop when fully open.