Non-Burst Expansion Vessel
Fixed-membrane non-burst expansion vessels: vertical and horizontal models from 2 to 200 liters for booster pump, central heating, and solar energy systems.
Subcategories
Products (7)
- EDS Global Fixed Diaphragm Vertical Non-Burst Expansion Vessel, Upright – Request a quote (out of stock)
- Global 200 L Vertical Freestanding Non-Burst Expansion Vessel, 10 Bar, 90°C, 1.1/4" Connection – Request a quote (out of stock)
- Global 20-Liter Horizontal Legged Non-Burst Expansion Vessel, 10 Bar, 90°C, 1'' Connection – Request a quote (out of stock)
- Global 2 L Vertical Legless Non-Bursting Expansion Vessel, 10 Bar, 90°C, 1'' Connection – Request a quote (out of stock)
- Nortek SDS 24 V Fixed-Membrane Expansion Vessel, 24 L, Vertical, Legless, 10 Bar – $93.60
- TR TANK Horizontal Expansion Vessel, Fixed Membrane, Non-Explosive, 24 L, 10 Bar – $61.91
- TR TANK Stainless Steel Expansion Vessel, 24 L, 10 Bar – $147.64
Brands: EDS Global · Global · Nortek · TR TANK
What does "non-burst expansion vessel" mean?
In expansion vessels marketed as "non-burst," the membrane is fixed to the vessel body. While in bladder-type diaphragm vessels the membrane freely inflates and deflates inside the vessel, in the fixed-membrane design the membrane operates by pressing against the inner surface of the body. The term "non-burst" refers to this construction. These vessels are used in booster pump systems, central heating and combi boiler systems, and solar domestic hot water systems.
Models and applications
- Vertical non-burst vessels: With legged or legless body; available in small and large capacity options.
- Horizontal non-burst vessels: Legged body; models compatible with packaged systems.
- Stainless steel body vessels: For applications requiring hygiene, with a corrosion-resistant body.
Vessels in the category are generally manufactured to a 10 bar pressure rating; capacities range from 2 to 200 liters.
Before purchasing
Because the membrane is fixed to the body in fixed-membrane vessels, it may not be removable and replaceable on its own as it is in bladder-type vessels; check the product description when planning maintenance. Whether the vessel is suitable for drinking water or heating systems, its maximum operating temperature, and its pressure rating should be verified from the label information. Capacity selection follows the same rules as other expansion vessels — based on pump capacity for booster pump applications and on system water volume for heating systems. Pre-charge pressure adjustment is also carried out the same way, with the water side of the vessel empty.
Frequently asked questions
Is a non-burst vessel completely failure-free?
Like any diaphragm vessel, it can wear over time; the name only describes the internal construction. Regular air pressure checks extend the vessel's service life.
Can it replace a standard expansion vessel?
Yes, if the capacity, pressure rating, and connection size are compatible. If a pump is to be mounted on top of the vessel, also check the mounting plate dimensions.
Which capacity should I choose?
Small-capacity vessels of a few liters are used in small hot water and combi boiler circuits, while larger capacities are used in booster pump and large heating systems. For other options, you can browse the expansion vessels category.
Can a non-burst vessel be used for drinking water?
Models specified as suitable for drinking and domestic water can be used. This information appears on the product label and in the description; do not use vessels manufactured for heating systems with drinking water.
What is the advantage of a stainless steel body?
A stainless steel body is more resistant to corrosion in outdoor environments and damp boiler rooms; it retains its original appearance longer than a painted body.