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K500 Auto Hydroheater – 3.5 Rev: 8-2016
© Hydro-Thermal Corp., 2014. All rights reserved
Hydroheater, Solaris, Jetcooker, EZ Heater and K5 Autopilot are trademarks of Hydro-Thermal Corp, and are protected under
U.S. and Canadian patents.
5.3 Excessive Temperature Variation
The temperature sensor should be verified for its position, function, and connection.
The temperature sensor is maybe located too far downstream from the K500. Refer
to section 3.3 for guidelines on properly installing temperature sensor.
PID control parameters should be reviewed relative to the response time of the
heater, actuator position and the temperature changes and thereafter the parameters
optimized.
Steam pressure trending should be observed. Rapid fluctuations in steam pressure
will affect temperature control.
Flow rate data should be captured to observe sudden flow rate variations. Typically a
high temperature reading will occur with a drop in flow if the response is too slow,
and vice versa. It may become necessary to add a recirculation loop if the flow
variation becomes too excessive, to stabilize temperature variation.
Heater components may be worn. If the unit has been in service for more than a year
or has been subject to “wet steam,” a visual inspection of the internal components
and seals is recommended.
6.0 Maintenance
6.1 General Practices
Note – Hydro-Thermal has maintenance programs available, including on-site
technician visits, to help you keep your K500 in top running condition.
The K500 is a very robust valve for process control but requires preventive
maintenance of its wear components to maximize the life of the steam control
components. Simply maintaining the disposable and less expensive components on a
regular basis will reduce the total cost of the unit during the length of its operation.
If noise, vibration, or temperature variation occurs, maintenance may be necessary.
Notify Hydro-Thermal if this happens at: info@hydro-thermal.com or call (262) 548-
8900. If possible, please have the heater’s serial number when calling. (See section
1.5.2).
To prevent unintended shutdowns or the potential for extended outages, Hydro-
Thermal offers a range of preventive maintenance plans. These plans range from
stocking a spare heater in your plant in case of emergency shutdown, stocking spare
internal and soft parts for your heater, service technician visits and training your
maintenance staff and operators, or complete refurbishment of your unit. Call us to
learn about the various maintenance plans and options.
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