Air check valve ECV

for industrial applicationsfor explosive atmospheressuction

Overview
Emergency Check Valves (ECVs) are designed to block the spread of flames and gases, thereby preventing structural damage and protecting operators. The safety non return valve is certified ATEX EN16447 against the propagation of an explosion in the suction line as required by the ATEX directive 2014/34/EU. ECVs are passive safety devices that activate automatically in case of overpressure or explosion, sealing tightly to prevent backward flow of unwanted gases or flames.

Function / Operation
ECVs remain open during normal operation and do not restrict flow. In the event of an explosion or backpressure in a filtration device or ducting, the valve closes to prevent the effects of explosion and fire from traveling back through the ducting to work areas. Once activated by overpressure, the valve stays closed, preventing backward propagation of flames and gases.

Applications
ECVs are required on all waste extraction systems that include a filtration device. They form part of safety systems for industrial environments at risk of explosion and are intended to protect structures and personnel.

Construction & Materials
ECVs are constructed from carbon steel (painted blue RAL5010 or red RAL3020) or stainless steel (AISI 304). Unions are welded and reinforced to withstand high pressure.

Available options / Variants

• ECV with microswitch (close position)
• ECV without microswitch
• ECV in-situ installations
• Second design variant (ECV 2nd design)
• NRV (non-return valve) related imagery/variants shown

Accessories (on request)

• Safety anti-opening block
• Micro-switch (close position)
• Sensor inside for material stop
• Gasket in silicon cell
• Sound proofing

Additional safety systems
As part of turnkey solutions, proprietary spark and flame detection devices can be provided to create alarms and shut down the waste system, and extinguishing systems can be integrated where required to further reduce the risk of fire.

Characteristics / Technical specifications

• Certification: ATEX EN16447 (designed to prevent propagation of explosion in suction line)
• Compliance: ATEX directive 2014/34/EU
• Intended use: Waste extraction systems with filtration devices (prevents backward flow of flames/gases)
• Operation: Passive, automatic activation on overpressure; remains closed after activation
• Construction materials: Carbon steel (painted RAL5010 blue or RAL3020 red) or Stainless Steel AISI304
• Unions: Welded and reinforced for high pressure resistance
• Optional accessories: safety anti-opening block, micro-switch close position, internal sensor for material stop, silicon-cell gasket, sound proofing
• Integration: Compatible with spark/flame detection and duct extinguishing systems as part of turnkey safety solutions