The B Series Solution
The two most common Parker actuated ball valves in analytical service are the B and MB Series. The B Series has the most expansive Pressure/Temperature range of any ball valve under 6,000 PSIG CWP (Cold Working Pressure) in any product line.
When ordered with an actuator, B Series ball valves come with a non-adjustable O-ring packing. Actuated MB Series valves contain the same packing
style as manual MB Series valves and will ultimately require maintenance. However, MB Series ball valves require only a one-step maintenance procedure requiring only a standard wrench and approximately 3 to 5 minutes (worst case scenario), Fig. 9.7. This simple procedure requires no complicated and time-consuming
disassembly, no specialized tools, and eliminates replacement rather than repair.