We now have a new brand dedicated to serving clients worldwide. Please explore our global site for enhanced services, updated products, and regional support.
Follow: Safety valves used in combination with bursting disc safety devices.
One of the most critical sections of the standard defines the pressure loss limitations between the protected vessel and the safety device. If the inlet pipe is too long or too narrow, the pressure drop can cause "chatter" (rapid opening and closing) or "flutter," which destroys the valve seat. ISO 4126-9 sets limits (typically that the pressure drop should not exceed 3% of the set pressure) to prevent this instability.
Safety devices for protection against excessive pressure - Part 9: Application and installation of safety devices excluding stand-
: Automatic devices that release fluid to reduce internal pressure. Combined Systems
: Safety valves used in combination with bursting disc safety devices.
One of the most critical sections of the standard defines the pressure loss limitations between the protected vessel and the safety device. If the inlet pipe is too long or too narrow, the pressure drop can cause "chatter" (rapid opening and closing) or "flutter," which destroys the valve seat. ISO 4126-9 sets limits (typically that the pressure drop should not exceed 3% of the set pressure) to prevent this instability.
Safety devices for protection against excessive pressure - Part 9: Application and installation of safety devices excluding stand-
: Automatic devices that release fluid to reduce internal pressure. Combined Systems