Safety Valve
Emergency Vent valves

About The Product

High-Capacity Protection for Storage Tanks Valvyn Emergency Vent Valves are designed to provide rapid, high-capacity pressure relief for storage tanks during abnormal conditions such as fire exposure, runaway reactions, or equipment failure. They act as a secondary safety device, protecting tanks from catastrophic rupture.

They are primarily used in situations such as external fire exposure, thermal expansion of stored liquids, runaway chemical reactions, blocked vent systems, sudden vapor generation, or equipment malfunction. During such emergencies, normal pressure relief vents may not provide sufficient capacity, making emergency vent valves an essential secondary protection system.

Safety Relief Valve
Model Number:VYN-EVV-9900 Series

Features

  • Large flow capacity for emergency scenarios
  • Full-lift opening with minimal pressure rise
  • Weight-loaded / spring-assisted design
  • Weatherproof cover with hinged mechanism
  • Robust construction for harsh environments

Technical Specifications

  • Valve Type:Emergency Vent Valve (Hinged Type)
  • Size Range:4” to 24” (DN100 to DN600)
  • Pressure Rating:ANSI 150 / 300 / 600
  • End Connections: Flanged (RF/FF), Screwed, Butt Weld
  • Gas Group: IIA / IIB / IIC
  • Explosion Type:Deflagration / Detonation
  • Design Standard:ISO 16852 / EN 12874 / API 2000
  • Operating Temperature: -20°C to +250°C
  • Element Type : Crimped Ribbon / Plate
  • Element Material:SS304 / SS316 / SS316-Ti / Hast Alloy C276
  • Body Material :CS / SS304 / SS316 / CS-PTFE
  • Flow Direction:Uni / Bi-directional
  • Installation:Horizontal / Vertical
Safety Relief Valve
Model Number:VYN-EVV-9911 Series
Safety Relief Valve

Features

  • Precision-set pressure & vacuum relief
  • Bubble-tight soft seated sealing
  • Rugged, corrosion-resistant construction
  • Compact design with easy maintenance access
  • Optional flame arrestor integration
  • Weather protection hood for outdoor use

WHY EMERGENCY VENTING IS CRITICAL

  • Fire exposure causes rapid vapor expansion inside tanks
  • Normal breather valves (PVRV) are not sufficient for emergency flow rates
  • EVV opens fully to relieve massive vapor volumes instantly
  • Prevents tank explosion or structural failure

WHY VALVYN EVV

  • Engineered for maximum safety under extreme conditions
  • Complies with API 2000 emergency venting requirements
  • Reliable operation with fast response time
  • Custom sizing based on fire case calculations

WORKING PRINCIPLE

  • Under normal operation → Valve remains closed
  • During emergency → Tank pressure rises rapidly
  • At set pressureHinged cover lifts fully
  • Custom sizing based on fire case calculations
  • Provides instant high-capacity venting

Valvyn Models

Chemical
Pharmaceuticals