Flowserve IOM Control Valves - Manual (Page 21)

EN
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 first 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 finish! A
damaged spindle surface finish may be detrimental to the smooth operation of
the stuffing 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 fitting 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.