Flowserve IOM Control Valves Manual de usuario descargar pdf (Pagina 21)

Whenthecontrolvalveisinstalledinthepiping:

• connectinstrumentairtotheactuatororinstalledaccessories

(appliestopneumaticlinearactuators).

• connect according tothe wiring diagram in the removable

actuator cover or according to manufacturer’s actuator

documentation(appliestoelectricalrotary/linearactuators).

• Continuously increase load until operation parameters are

reached.

Sudden exposure of the control valve to the full working pressure and working

temperature may cause stress cracks.

• After the rst loading (trial run) in depressurised and cool

conditions, evenly tighten screw connections of sealing

componentscrosswise(ifrequired).

Be careful to prevent damage to the high quality spindle surface nish! A

damaged spindle surface nish may be detrimental to the smooth operation of

the stung box.

• Excessive levels of noise and vibration during operation

indicatecriticaloperatingconditionsandmustbeavoidedat

allcosts.

Impermissible continuous operation of control valves under critical conditions

can damage the valves, as they are not designed to cope with this situation.

• Avoidfrequentsystemstart-upsandshutdowns.

Experience has shown that critical operating conditions, which can damage

the control valve, are often encountered when starting up or shutting down the

system.

• Keeptheoperatingmediumfreeofforeignparticles.

Foreign particles can damage the control valve; this can be prevented by tting a

suitable dirt trap.

• TheinstrumentairmustconformtoatleasttheISO8573-1

class2ortherequirementsoftheaccessorymanufacturer.

Contaminated instrument air can damage the accessories and valve or cause

them to fail.

Bodily injury or damage to the control valve and its accessories as the result of non-

adherence to warning instructions, as well as transport damage and improper use

(e.g. as a climbing aid, etc.), will render the manufacturer’s guarantee null and void

and release him from any responsibility.

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Flowserve IOM Control Valves Manual de usuario Pagina 21