ASME, Boiler and Pressure Vessel Code: Section VⅢ ,Rrles for Construction of Pressure Vessels
Safety Devices for Protection Against Excessive Pressure Part 1: Safety Valves
Sizing, Selection, and Installation of Pressure-relieving Devices in Refineries Part 1 -Sizing and Selection
Flanged Steel Pressure Relief Valves
Seat Tightness of Pressure Relief Valves
Safety valves-General requirements
Performance Test Code-Pressure Relief Devices
Flexible Thermal Disc-- The flexible thermal disc is designed for high temperature and pressure steam service.
It is designed with flexible structure that can not only avoid the leaks due to the thermal deformation, but also provide the auxiliary sealing force by using the steam media force.
So the disc can guarantee the sealing performance of the safety valve under the high temperature and pressure condition
Double Adjusting Ring--The structure allows the use of the counter force and tensile force of the steam flow to ensure the full displacement when the blowdown is with in 3%.
Low Acting Point and Sound Neutral--Lower end of stem is spherical so that the spring forcce on the upper end have sound neutral and the inner part moves flexible and reliable.
Low acting point can balance pressure and ensure the best sealing performance.