Page 451 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition
P. 451
Process Safety and Pressure-Relieving Devices 417
Relief Mechanisms r·�����A������
������-e�������
Reclosing Devices, Spring Loaded
Safety and relief valves must be the direct spring loaded '----C. �� ..... iiiiiiii�..,....---�----��J
type, and for pressure ranges noted below the code [I] l
requires:
�����J
Max. Spring Reset Referenced
Set Pressure to Set Pressure"
�250 psig ±10%
;::250 psig ± 5%
*Marked on valve
As$embly #FA-7a
Assembly #FA-2
Anembly #FA-4 AIMmMy fFA-5
l �
- .
Auembly #FA-9
Figure 7-BQ. Typical bolted type safety head assemblies with angular seat design. By permission, B.S.&B. Safety Systems, Inc.
