Download pick variable flow service manual

PICK VARIABLE FLOW SERVICE MANUAL
Malfunction in the pump
look check valve
Capacity of heater is
exceeded
Steam inlet pressure
varies
Steam valve has a
jerky motion
Faulty temperature
controller
Boiler or supply not
adequately sized to provide
enough steam to
accommodate all demands
in the steam system
Steam quality may be poor
(excess condensate
entrained in system)
Steam valve packing gland
too tight
Air leak in the control line
Steam valve oscillates
*PID- Proportional
Integral Derivative,
the tuning parameters
on some electronic
and pneumatic
temperature
controllers
Inspect and repair
check valve as
necessary
Consult Pick Heaters
for heater upgrade
information
Repair or replace
controller
Check steam supply
sizing and boiler for
pressure fluctuations
Install a drip leg with a
steam trap upstream of
the strainer, to maintain
high quality steam at
the heater.
Adjust steam valve
stem packing gland
-Use Soap solution to
detect any leaks
-Repair leaks or replace
line
Optional temperature
Tune the controller per
controller not properly tuned controller manual.
*(PID Parameters)
Refer to detailed
Injection tube problem
instructions for
Stuck piston
disassembly and
Plugged Orifices
inspection of the heater
Broken spring
and injection tube
-Bleed air from the
Air or gas trapped in a high
system
point of the supply or the
discharge piping creating an -Remove surge tank
-Install automatic air
unstable condition
vent valve(s) at system
high points
Water and steam pressures
Check operating
too close together
pressures
Reduce water pressure
or increase steam
pressure
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See
Installation
Manual
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