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Sizing of control valves shall be made in accordance with the IEC 534-2 / ISA 75.01 standards and/or
the control valve Supplier’s sizing computer program.
Globe valves should be used but depending on service conditions and application other types may be
The size of valves should be 1, 1.5, 2, 3, 4, 6, 8, 10 inch and higher.
All valves shall be equipped with integrated position indicators.
When requirements to max. allowable leakage rate has to be set, ANSI/FCI 70-2 shall be applied.
Face to face dimensions shall be according to ANSI B16.10.
Arrow indicating direction of the flow shall be permanently marked on each side of the valve body.
Self-acting control valves shall be used only when a sufficient differential pressure exists.
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