Threaded Stainless Steel Sanitary Butterfly Valve

The Threaded Stainless Steel Sanitary Butterfly Valve is a critical fluid control device used to regulate the flow and pressure of liquids or gases in hygienic piping systems. Characterized by its internal threaded ends and Stainless Steel construction, it provides a sanitary isolation solution that is highly corrosion-resistant and easy to disassemble for cleaning.

This type of valve is widely used across the Food, Pharmaceutical, Chemical, and other industries where cleanliness and product purity are paramount.

⚙️ Key Features and Advantages

Sanitary Compliance: Constructed from high-grade Stainless Steel ( $\text{SS}304$ or $\text{SS}316\text{L}$ implied) and designed with smooth, polished internal surfaces to minimize bacterial accumulation and contamination risk.
Threaded Connection: Uses internal threads (e.g., NPT, BSP, or specialized hygienic threads) for connection to the pipeline.
- Advantage: Provides a robust, bolted-free connection, often preferred in smaller pipe sizes or where quick screw-together assembly is desired over welding or clamping.
Corrosion Resistance: The Stainless Steel material ensures the valve can withstand aggressive process media and strong $\text{CIP}$ (Clean-in-Place) chemicals.
Flow Control: As a quarter-turn valve, it offers quick $\text{ON}/\text{OFF}$ control but should be used primarily for isolation rather than precise throttling.

🛠️ Installation Steps and Requirements

Proper installation is crucial for ensuring the valve’s correct function, reliable sealing, and long service life.

1. Pre-Installation Checks

Inspection: Verify that the valve body, disc, and seals are free from any damage or foreign particles.
Compatibility: Confirm that the valve’s pressure and temperature ratings and material grade ( $\text{SS}316\text{L}$ often preferred) are compatible with the media and operating conditions.
Pipeline Cleanliness: Ensure the pipeline ends are clean, properly threaded, and free from debris that could damage the valve seat.

2. Installation Procedure

Flow Direction: The butterfly valve disc is generally centered, but always confirm if the valve has a preferred flow direction (marked by an arrow on the body) and install it accordingly.
Alignment: Align the valve threads perfectly with the pipeline threads to prevent cross-threading or excessive stress on the body.
Sealing: Apply appropriate thread sealant (e.g., $\text{PTFE}$ tape suitable for sanitary systems) to the male pipe threads. Do not apply sealant to the female valve threads.
Tightening: Hand-tighten the connection first. Use a proper wrench to tighten to the required torque, avoiding excessive force which could warp the valve body or damage the threads.
Clearance: Ensure the valve disc has full clearance to operate without hitting the pipe inner wall.

3. Post-Installation Checks

Operation Test: Manually cycle the valve through its full $\text{ON}/\text{OFF}$ range to confirm smooth operation.
Pressure Test: After installation, slowly pressurize the system and check all threaded joints for leakage.

🏭 Application Fields

The Threaded Sanitary Butterfly Valve is frequently utilized in:

Food & Beverage Industry: Transfer lines for juices, milk, and soft drinks.
Pharmaceutical & Biotech: $\text{WFI}$ loops, chemical transfer, and clean utilities.
Chemical Industry: Non-aggressive chemical and solvent handling.