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WorksheetsNELES CONTROL VALVE & ESD
Total questions: 11
Worksheet time: 6mins
For ANSI FCI 70-2, seat leakage is allowed even for smallest size of valve. True or False?
True
False
For CO2 – Adsorption, Valmet Flow Control has vast experience in valves for molecular sieve applications, such as PSA/VSA/TSA
True
False
NDX Smart Positioner can provide pneumatic capacity of 80 Nm3/h to actuator and with a low air consumption of 0.1 Nm3/h at steady state of the valve position.
True
False
VG9000 can be used for Throttling control valves and Safety system valves (SIS)? True or False?
True
False
Flashing can be solved by adding Q-trim? True or False?
True
False
Especially for SIS valves, careful valve-actuator integration is important. What is the main reason for this?
To minimize actuator size and weight
To ensure adequate torque and MAST margins are provided
To have the lowest possible cost
When stroking speed of On-off valve or SIS valve needs to be faster, what is the key point to address?
Actuator size to have more power (torque)
Stronger spring to have more power (torque)
Capacity for moving air in / out of actuator (accessories’ sizing)
Users have many different control valve styles to choose from. When maximizing flow capacity and rangeability is the key criteria, what valve style is most like to provide the solution?
Unbalanced plug globe valve
Balanced plug globe valve
V-Ball valve
Users have many different control valve styles to choose from. When the service requires controlling flow at very high pressure differential (and the dP/P1 ratio is high), what valve style is most like to provide the solution?
Balanced plug globe valve with perforated cage trim
V-Ball valve with Q-Trim
High pressure gate valve
What factors are typically the big contributors to increased stem leakage
Packing wear, scratches on stem due to particles in the fluid
Shaft / Stem bending due to weak actuator mounting
Old valve or valve construction unsuitable for the service
All Of Them
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Luca Modric
Lionel Messi
Other player
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