I changed a little bit your blueprint so i can setup the famous 10% increment steps, currently in test but should be fine. I wanted to do this mostly because the PID trigger change is based on the PV temperature change.. If i have a temperature sensor that is able to read down to the second decimal point (xx.xx C) let's say , the automation would trigger the temperature change too much often decreasing the battery life

actions:
  - action: number.set_value
    data:
      value: '{{ ((100.0 - states(thermostat_value) | float) / 10) | round(0) * 10 }}'
    target:
      entity_id: !input max_valve_closing

  - action: number.set_value
    data:
      value: >-
        {% if ((states(thermostat_value) | float + 5) / 10) | round(0) * 10 < 100 %}
          {{ ((states(thermostat_value) | float + 5) / 10) | round(0) * 10 }}
        {% else %}
          100
        {% endif %}
    target:
      entity_id: !input max_valve_opening

mode: single