Geothermal Vaults and HDPE Structures

What is a Structure?• Valve Vault • Manhole• Pump Station• Catch Basin• Junction Box• Wet Well• Sump• Knock Out Pot• Valve Box• Tank• Etc

All of these have been made from HDPE by ISCO Industries

For:

Water/Sewer

Industrial

Landfill

Irrigation

Geothermal

Typical HDPE Structures

Geothermal Structures

Advantages of HDPE StructuresThey are the same as the pipe:• Tough• Flexible• Leak-free• Lightweight and easy to install• Corrosion & Chemically resistantHDPE structures can be prefabricated for

installation savings and higher quality.

Design Elements

• Header/Circuit size• # of Circuits• Location of Circuits• Circuit Valves• Header Valves• Manway• Misc

Header and Circuit configuration

• Header size is typically 4”-10” which does not affect cylinder diameter

• # of circuits and location of circuits will affect length

Location of Circuits

• Standard configuration is for circuits to come out both sides of vaults

• Can offer circuits to exit one side

• Can create unbalanced number from one side to other

Valves for Vault• Standard Valves

typically butterfly valves• Balancing valves and

circuit setters available• Ball valves for purge

ports only- not recommended for circuits

• Typically provide butterfly valves for main shutoff

• New Bypass recirculation

Manway design• Standard Bolted

Cover • H-20 load bearing

available• Variable diameter

with 28” OD standard

• Height can be specified- shipping concerns become a factor with excessive height

Miscellaneous Items

• Ladder (standard)• P/T ports

(standard)• Lights• Electrical outlets• Drain Valves for

main/header

Miscellaneous Items

• Sump• Pump• Pressure Gauges• Thermometers• Drain Valve for

circuits

• Keep in mind this vault is not a mechanical room.

Factory Tested for Leaks• Header and Circuit piping hydrostatically

tested to 100 psi

• Structure tested with 2-3 psi of air to verify vault sealed from groundwater and weather.

• Misc items like sump/pump become unessential if liquid in interior comes from upset conditions, not standard conditions.

Installation Value

• Lightweight– typically less

than 5000 lbs

– Maximum of 15000 lbs for 36 circuits

Installation Value

• Fast install– Compared to

alternate choices, time is measured in hours verses days/weeks

Installation Value

• Simple and Reliable Connections– Circuits and

headers are connected to stubs on vault with Butt Welding or Electrofusion

• Years of Design and Fabrication experience can help prevent installation and operation headaches.

• Choose an ISCO Circuitmaker Vault for reliable strength and leak free performance!