SI2 Spring-Loaded Full-Stroke Safety Valve

Overview and Certification

The SI2 safety valve is spring-loaded and full-stroke certified for safe handling of fluids and gases. It is ideal for hygienic and clean-in-place (CIP) applications across various industries.

Key Advantages

Design and Cleanability

• Hygienic construction with smooth internal surfaces (Ra ≤ 0.8 µm)
• Suitable for CIP applications with optimal flow-through design
• Quick and easy seal replacement simplifies maintenance

Operation and Control

• Pneumatic or manual operation options
• Pneumatic seat lifting device supports proximity switch integration for position feedback
• Each valve uniquely identified via nameplate for easy traceability

Performance and Safety

Pressure Control Functionality

The SI2 valve ensures operating pressures do not exceed the set threshold by more than 10%. Upon reaching this pressure, the valve opens. It recloses when pressure drops below:

• 10% for gas applications
• 20% for liquid applications

Materials and Sizes

Construction Materials

All product-contact parts are manufactured from AISI 316L / DIN EN 1.4404 stainless steel to ensure corrosion resistance and long-lasting sanitary performance.

Nominal Dimensions

Available sizes: DN 25 – DN 100

Actuator Warranty & Reliability

The actuator supplied with this valve is covered by a 5-year actuator warranty, or up to 1 million actuations, whichever comes first. Built with fully welded, sealed, maintenance-free construction, it eliminates internal servicing and reduces wear components to deliver long-term durability in demanding hygienic processing environments.

Key benefits include:

• Maintenance-free operation with no internal servicing
• Fewer spare parts and improved total cost of ownership
• uptime and production continuity

Key Applications

Field of Application

The TÜV type-test approved valve is used at pressure vessels which have to be protected against excessive pressure. In the beverage and food industry as well as in pharmaceutical applications, the valve safeguards tanks and other containers against inadmissible excess pressure.