hydro THERMAL K500 - Disassembly and Assembly; Head-Actuator Removal

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K500 Auto Hydroheater – 3.5 Rev: 8-2016

Hydroheater, Solaris, Jetcooker, EZ Heater and K5 Autopilot are trademarks of Hydro-Thermal Corp, and are protected under

U.S. and Canadian patents.

7.0 Disassembly and Assembly

7.1 Head-Actuator Removal

In some instances, it may be easier to remove the head, stem plug, and actuator as

an assembly rather than completely disassembling the Hydroheater. This will save a

significant amount of time and effort versus disassembling the stem plug and

actuator. Examples of these circumstances are:

 Stem Plug not fully closing

 Stem Plug closing but still leaking steam

 Unstable Temperature Control, particularly at lower steam output

For inspection purposes, there is no need to disassemble the stem plug from the

actuator. This allows for inspecting the inside of the nozzle for wear/debris and the

tip of the stem plug.

Please follow the steps below or consult the Hydro-Thermal Service Department with

any questions.

1. Personally verify that steam, process inlet, and heater outlet are “Locked Out

and Tagged Out.”

2. Mark current positions (Actuator to Head and Head to Body, etc) with a marker

so you know where to orient each assembly for reassembly.

3. Remove the head nuts. On some models, the two nuts on each side of the

actuator frames need to be removed after the head is partially removed for

needed clearance.

Figure 14: Actuator Mount to Head

4. Check adjustment left on the packing follower. If there is still plenty of travel

and it is not leaking then move to the next step. If the opposite is true, then

consider taking the heater completely apart. These steps are shown in section

7.2.

Actuator must be

loosened or removed to

remove bolts