SVI Series — Cast Iron Safety Relief Valves with Brass Seat

The SVI Series Safety Relief Valves are cast iron safety valves with a brass seat, designed to provide reliable overpressure protection for unfired pressure vessels and saturated steam systems. These valves are ASME Section VIII “UV” certified.

Technical Specification

Operating Principles

Under normal operating conditions, system pressure remains below the valve set pressure and the disc remains seated. When pressure reaches the set point, the valve opens rapidly with a full “pop” action to quickly discharge pressure. Once pressure drops to a safe level, the valve automatically reseats.

Applications

• Unfired pressure vessels
• Saturated steam systems
• Industrial boilers
• Process equipment
• ASME Section VIII coded installations

Notes

• Set pressure must be specified when ordering.
• Proper sizing and installation are essential for safe operation and code compliance.
• Installation should conform to ASME and local code requirements.
• Consult factory for special materials, service conditions, or application guidance.

Note: We will contact you during order fulfilment to discuss shipping and handling costs for products weighing more than 150 pounds. These costs will be billed separately.