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Rancilio Silvia Mega-Mod part 9 Boiler insulation

by Updated: Apr 9, 2020diy-coffee4 comments

Silvia Mega-Mod p9 boiler insulation

Index of Silvia Mega-Mod posts:

Introduction | Disassembly | Pressure Gauge | Brew+Steam Control | Brew Timer | Pre-Infusion
Water Level | Light | Boiler Insulation | Grouphead Shower | Drip Tray | Pump Drain
Power Timer | Insulated Steam Wand | Acknowledgments
Buy Silvia Mega-Mod eBook

Avi's Silvia Mega-Mod

My way to a better coffee...

DISCLAIMER - Important!

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Silvia boiler and its pipes come none insulated.
This waste energy and heats up surrounding components.
Pre-Infusion switch on control box
Boiler insulation schematic drawing
Adding a silicone sponge (which stands high temperature as 250C/480F) as insulation, helps to better preserve energy and protect other components.

You need to use closed cell Silicone sponge with 1/4″ (~6mm) and 1/8″ (~3mm) thickness.

tipTip: From a sheet of around 350x220mm (13.8×8.7″) you will be able to cut all needed covering parts.

The boiler was wrapped with a 1/4″ thick. sheet and another sheet was used for the flange. The boiler top has 2 circular layers of 1/4″ thick. that has cuts in it to fit the thermostats, heater contacts and thermocouple wire. Attaching the sponge sheets was done by using standard Nylon cable ties. Above you can review a drawing that shows the boiler insulation structure.

To help figure out the cutting dimensions, here are some important V3 boiler dimensions:
– boiler diameter is 80.5mm (3.17″) it is a little bit conic.
– boiler height is 82.5 mm (3.24″) to flange, 77.5 mm (3.05″) to surrounding bolts
– boiler flange diameter is ~101 mm (3.98″)
Avi's Silvia Mega-Mod Boiler Insulation image 02

Avi’s Silvia Mega-Mod Boiler Insulation grouphead

Grouphead upper insulation

Avi's Silvia Mega-Mod Boiler Insulation image 03

Avi’s Silvia Mega-Mod Boiler Insulation grouphead

Grouphead lower insulation

Avi's Silvia Mega-Mod Boiler Insulation image 04

Avi’s Silvia Mega-Mod Boiler Insulation

Boiler insulation – Front view

Avi's Silvia Mega-Mod Boiler Insulation image 05

Avi’s Silvia Mega-Mod Boiler Insulation

Boiler insulation – Rear view

Out of the boiler, I also added Silicon sponge to the steam pipe, to the grouphead and to the OPV part. Adding insulation to the steam pipe reduced the temperature of the cup preheating plate, but this is not a problem since I always pour hot water to the cups to warm it prior of brewing.
Go to part 10: Grouphead shower

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Index of Silvia Mega-Mod posts:

Introduction | Disassembly | Pressure Gauge | Brew+Steam Control | Brew Timer | Pre-Infusion
Water Level | Light | Boiler Insulation | Grouphead Shower | Drip Tray | Pump Drain
Power Timer | Insulated Steam Wand | Acknowledgments
Buy Silvia Mega-Mod eBook

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If yes, please consider donating some $$$ to help me cover the hosting cost involved. Thanks

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4 Comments

  1. Yoni
    Yoni on October 1, 2021 at 19:39

    Thank you dear Avi. So I should buy two 350x220mm sheets for all parts? Because I need one sheet of 3mm thickness and one of 6mm.

    Reply
    • Avi Schneor
      Avi Schneor on October 2, 2021 at 09:03

      Thank you.
      Yes, two sheets will cover the job.
      good luck

      Reply
  2. Max B.
    Max B. on August 20, 2018 at 10:51

    Hey – did you make a template for cutting the insulation parts? It’d be amazing if you posted a PDF of it for others to use. Great blog by the way! 🙂 Max.

    Reply
    • Avi Schneor
      Avi Schneor on August 23, 2018 at 14:55

      Hello Max and thanks for your comment.
      No, I didn’t make any template as I made only 1 set of insulation parts without production considerations. Thanks.

      Reply

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