Expansion Vessel Service Valve

The expansion vessel service valve is designed for use in heating and cooling systems, particularly in closedloop systems like boilers or heating systems. It allows for maintenance or servicing of the expansion vessel, which is a crucial part of the system that helps maintain pressure levels within the system as water heats up and expands. The EVSV is connected to the expansion vessel and allows engineers to isolate the vessel from the rest of the system when maintenance is required. This might involve checking or adjusting the pressure within the vessel, replacing the vessel, or performing other maintenance tasks. The EVSV ensures that the expansion vessel can be properly maintained and serviced without disrupting the operation of the entire heating or cooling system.

•  Isolate without having to drain down the whole system
•  No need to add inhibitor back into the system
•  Allows the vessel to be isolated and drained for essential periodic servicing and re-charging
•  Shut off and drain, for membrane expansion vessels in sealed heating and cooling systems
•  Protected shut/open facility against inadvertent closing  Anti-tamper lever
• Drain vessel contents according to EN 12828 
•  Supplied with washer and locking wire
•  Swivel nut for ease of installation
•  Includes swivel drain off

• 3/4" Male
• 3/4" Female Swivel Nut
• Max Operating Temp 120°C
• Max Pressure 10 bar