Wessels Expansion Tanks
Wessels manufactures three expansion tank designs: Compression, Bladder & Diaphragm. Each tank style has models that are either ASME or Non-ASME coded. Tanks range in size from 2 to 10,000 gallons. Most of Wessels pressure vessels are designed using a pre-pressurized vessel with an internal bladder or diaphragm to manage fluids under pressure.
Wessels Bladder Expansion Tanks:
Wessels bladder expansion tanks are required in a closed loop heating or chilled water HVAC system to absorb the expanding fluid and limit the pressure within a heating or cooling system. A properly sized expansion or compression tank will accommodate the expansion of the system fluid during the heating or cooling cycle without allowing the system to exceed the critical pressure limits of the system.
Information:
- Wessels NLA Series (ASME) Bladder Expansion Tank Brochure
- Wessels NLA 35-800L Series (ASME) Bladder Expansion Tank Submittal Sheet
- Wessels NLA 35-800L Series (ASME) High Pressure Bladder Expansion Tank Submittal Sheet
- Wessels NLA 1000-1500L Series (ASME) Bladder Expansion Tank Submittal Sheet
- Wessels NLA 1000-1500L Series (ASME) High Pressure Bladder Expansion Tank Submittal Sheet
- Wessels NVA 85-800L Series (ASME) Bladder Expansion Tank Submittal Sheet
- Wessels NVA 1000-1500L Series (ASME) Bladder Expansion Tank Submittal Sheet
- Wessels NLAP Series (ASME) Bladder Expansion Tank Submittal Sheet
- Wessels NL Series (Non-ASME) Bladder Expansion Tank Submittal Sheet
Wessels Compression Tanks:
Compression tanks are designed to absorb expansion forces and control the pressure in heating/cooling systems. This tank is the oldest style design and works well when the air is controlled and kept in the tank, not in the system.
Information:
- Wessels NA Series (ASME) Compression Tank Submittal Sheet
- Wessels NA Series (ASME) Compression Tank Instruction Manual
- Wessels Stainless Steel NA Series Compression Tank Series Submittal Sheet
- Wessels NAG Series (ASME) Compression Tank Submittal Sheet
Wessels HVAC Expansion Tanks
The Wessels diaphragm tank has been developed to allow the systems air cushion to be separated from the systems water. No water logging of the tank can occur as the air is held between the tank wall and the outside of a bladder placed inside the tank, while the system water is contained inside the bladder. This changes the system to an air elimination system, as any air extracted from the system water is passed out of the system into the atmosphere.
Information:
- Wessels NTA Series (ASME) Expansion Tank Submittal Sheet
- Wessels N Series (Non-ASME) Expansion Tank Submittal Sheet
Expansion tanks are required in a closed loop heating or chilled water HVAC system to absorb the expanding fluid and limit the pressure within a heating or cooling system. A properly sized tank will accommodate the expansion of the system fluid during the heating or cooling cycle without allowing the system to exceed critical pressure limits. The expansion tank uses compressed air to maintain system pressures by accepting and expelling the changing volume of water as it heats and cools. Some tank designs incorporate a diaphragm or bladder to isolate the expanded water from the pressure controlling air cushion. As water is expanded, it is contained in the bladder to prevent tank corrosion and water logging potentials. The pressure controlling air cushion is pre-charged at the factory and can be adjusted in the field to meet critical system requirements. This design and operation of this style of expansion tank allows the designer or specifying engineer to reduce tank sizes up to 80%.
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19010060 Wessels Series NTA-60 150# ASME Expansion Tank
Wessels
$1,794.9519010060 Wessels Series NTA-60 150# ASME Expansion Tank. Wessels NTA series are ASME fixed diaphragm type pre-charged HVAC expansion tanks. They are designed to absorb the expansion forces and control the pressure in heating / cooling systems. The...$1,794.95 -
2220130 Wessels Series NLA-130 Expansion Tank Bladder Only
Wessels
$2,557.952220130 Wessels Series NLA-130 Expansion Tank Bladder Only. Wessels bladder expansion tanks are required in a closed loop heating or chilled water HVAC system to absorb the expanding fluid and limit the pressure within a heating or cooling system. A...$2,557.95 -
14NA63 Wessels Series NA Hydronic Expansion Tank 23014063
Wessels
$971.9514NA63 Wessels Series NA Hydronic Expansion Tank 23014063, 15 Gal. Wessels NA series are ASME plain carbon steel expansion tanks. They are designed to absorb the expansion forces and control the pressure in heating/cooling systems. This tank is the...$971.95 -
12NA33 Wessels Series NA Hydronic Expansion Tank 23012033
Wessels
$728.9512NA33 Wessels Series NA Hydronic Expansion Tank 23012033, 15 Gal. Wessels NA series are ASME plain carbon steel expansion tanks. They are designed to absorb the expansion forces and control the pressure in heating/cooling systems. This tank is the...$728.95 -
2220300 Wessels Series NLA-300 Expansion Tank Bladder Only
Wessels
$4,136.952220300 Wessels Series NLA-300 Expansion Tank Bladder Only. Wessels bladder expansion tanks are required in a closed loop heating or chilled water HVAC system to absorb the expanding fluid and limit the pressure within a heating or cooling system. A...$4,136.95 -
FXA-400-WG Wessels Series Expansion Tank Bladder Only 2210400
Wessels
$2,561.952210400 Wessels Series FXA-400-WG Expansion Tank Bladder Only. Information: Wessels Series FXA Brochure Wessels patented FXA Tanks are ASME replaceable bladder type pre-charged hydro-pneumatic tanks for commercial and industrial well and...$2,561.95 -
FXA-300 Wessels Series Expansion Tank 21010300
Wessels
$3,707.95FXA-300 Wessels Series Expansion Tank 21010300. Wessels patented FXA Tanks are ASME replaceable bladder type pre-charged hydro-pneumatic tanks for commercial and industrial well and water systems, booster systems, or other non-heated potable water...$3,707.95 -
22010300 Wessels Series NLA-300 Expansion Tank
Wessels
$4,761.9522010300 Wessels Series NLA-300 Expansion Tank. Wessels bladder expansion tanks are required in a closed loop heating or chilled water HVAC system to absorb the expanding fluid and limit the pressure within a heating or cooling system. A properly...$4,761.95 -
FXA-300 Wessels Expansion Tank Bladder Only 02210300
Wessels
$3,329.95FXA-300 Wessels Expansion Tank Bladder Only 02210300. Information: Wessels Series FXA Brochure Wessels patented FXA Tanks are ASME replaceable bladder type pre-charged hydro-pneumatic tanks for commercial and industrial well and water...$3,329.95 -
FXA-200 Wessels Series Expansion Tank 21010200
Wessels
$2,788.95FXA-200 Wessels Series Expansion Tank 21010200. Wessels patented FXA Tanks are ASME replaceable bladder type pre-charged hydro-pneumatic tanks for commercial and industrial well and water systems, booster systems, or other non-heated potable water...$2,788.95 -
FXA-2500 Wessels Expansion Tank Bladder Only 2212500
Wessels
$6,837.00FXA-2500 Wessels Expansion Tank Bladder Only 2212500. Information: Wessels Series FXA Brochure Wessels patented FXA Tanks are ASME replaceable bladder type pre-charged hydro-pneumatic tanks for commercial and industrial well and water...$6,837.00 -
FXA-700 Wessels Expansion Tank Bladder Only 2210700
Wessels
$4,867.00FXA-700 Wessels Expansion Tank Bladder Only 2210700. Information: Wessels Series FXA Brochure Wessels patented FXA Tanks are ASME replaceable bladder type pre-charged hydro-pneumatic tanks for commercial and industrial well and water...$4,867.00 -
22010200 Wessels Series NLA-200 Expansion Tank
Wessels
$4,137.9522010200 Wessels Series NLA-200 Expansion Tank. Wessels bladder expansion tanks are required in a closed loop heating or chilled water HVAC system to absorb the expanding fluid and limit the pressure within a heating or cooling system. A properly...$4,137.95 -
2220200 Wessels Series NLA-200 Expansion Tank Bladder Only
Wessels
$2,848.952220200 Wessels Series NLA-200 Expansion Tank Bladder Only. Wessels bladder expansion tanks are required in a closed loop heating or chilled water HVAC system to absorb the expanding fluid and limit the pressure within a heating or cooling system. A...$2,848.95 -
Wessels Series NLA-800L-HP 300psi Expansion Tank
Wessels
$12,670.00Wessels Series NLA-800L-HP 300psi Expansion Tank. Wessels bladder expansion tanks are required in a closed loop heating or chilled water HVAC system to absorb the expanding fluid and limit the pressure within a heating or cooling system. A properly...$12,670.00 -
2220805 Wessels Series NLA-800L Expansion Tank Bladder Only
Wessels
$5,473.952220805 Wessels Series NLA-800L Expansion Tank Bladder Only. Wessels bladder expansion tanks are required in a closed loop heating or chilled water HVAC system to absorb the expanding fluid and limit the pressure within a heating or cooling system...$5,473.95 -
9800220 Wessels Series NLA-1000 Expansion Tank Bladder Only
Wessels
$7,681.959800220 Wessels Series NLA-1000 Expansion Tank Bladder Only. Wessels bladder expansion tanks are required in a closed loop heating or chilled water HVAC system to absorb the expanding fluid and limit the pressure within a heating or cooling system...$7,681.95 -
22011000 Wessels Series NLA-1000 Expansion Tank
Wessels
$9,843.9522011000 Wessels Series NLA-1000 Expansion Tank. Wessels bladder expansion tanks are required in a closed loop heating or chilled water HVAC system to absorb the expanding fluid and limit the pressure within a heating or cooling system. A properly...$9,843.95 -
FXA-NVA-500 Wessels Expansion Tank Bladder Only 2210500
Wessels
$3,643.952210500 Wessels FXA-NVA-500 Expansion Tank Bladder Only. Information: Wessels Series FXA Brochure Wessels patented FXA Tanks are ASME replaceable bladder type pre-charged hydro-pneumatic tanks for commercial and industrial well and water...$3,643.95 -
FXA-500 Wessels Series Expansion Tank 21010500
Wessels
$4,571.95FXA-500 Wessels Series Expansion Tank 21010500. Wessels patented FXA Tanks are ASME replaceable bladder type pre-charged hydro-pneumatic tanks for commercial and industrial well and water systems, booster systems, or other non-heated potable water...$4,571.95 -
22010130 Wessels Series NLA-130 Expansion Tank
Wessels
$3,587.9522010130 Wessels Series NLA-130 Expansion Tank. Wessels bladder expansion tanks are required in a closed loop heating or chilled water HVAC system to absorb the expanding fluid and limit the pressure within a heating or cooling system. A properly...$3,587.95 -
2220600 Wessels Series NLA-600 Expansion Tank Bladder Only
Wessels
$5,723.952220600 Wessels Series NLA-600 Expansion Tank Bladder Only. Wessels bladder expansion tanks are required in a closed loop heating or chilled water HVAC system to absorb the expanding fluid and limit the pressure within a heating or cooling system. A...$5,723.95