Construction
- Shell: fabricated steel, designed and constructed to ASME Section VIII, Division 1.
- Diaphragm: heavy-duty butyl rubber; non-replaceable.
- Standard air precharge: 12 psig (approximately 0.83 bar).
Diaphragm Expansion Tank
Taco CX Series Diaphragm Expansion Tanks
CX30–CX350 — butyl diaphragm, 125 psig, up to 240°F (116°C), 30–350 litres
Taco CX Series Diaphragm Expansion Tanks from Taco Comfort Solutions are steel tanks with a butyl rubber diaphragm that separates air and water for expansion control in closed hydronic systems.
Manufactured by
Taco Comfort Solutions
Taco CX Series Diaphragm Expansion Tanks
Review the confirmed product information, including description, features, benefits, and applications.
Taco CX Expansion Tanks take expanding system water into the upper chamber, deflecting the diaphragm and compressing the air charge below it to help control system pressure.
The partial-acceptance design suits small heating installations and chilled water systems that need limited expansion capacity. The tanks have a fabricated steel shell and a non-replaceable butyl rubber diaphragm.
Models & Capacity
- Models CX30, CX42, CX84, CX130, CX170, CX215, CX254, CX300 and CX350.
- Tank volume: 30–350 litres (8–92 US gallons).
- Limited acceptance capacity that varies by model and must be checked separately from total tank volume.
Pressure, Temperature & Connection
- Working pressure: 125 psig (approximately 8.6 bar).
- Maximum operating temperature: 240°F (116°C).
- System connection: 1" NPT.
Options & Service
- Optional California sight glass.
- Optional four seismic/anchor clips.
- For closed systems only.
Pressure Control
Helps control pressure changes caused by thermal expansion.
No Waterlogging
The diaphragm prevents air-charge absorption into system water and the waterlogging that follows.
Compact Solution
Suits systems with smaller expansion requirements in a compact tank.
Range of Capacities
Multiple capacities allow selection to match system sizing requirements.
Taco CX Series tanks provide expansion control in closed hydronic systems with smaller expansion volumes.
Closed Heating & Cooling
Closed hydronic heating and cooling systems.
Small Heating Installations
Small heating installations with limited expansion needs.
Chilled Water Systems
Chilled water systems that need smaller expansion volumes.
Commercial & Industrial
Commercial, institutional and industrial hydronic systems.
ASME Section VIII, Div. 1
Designed, constructed and tested to ASME Section VIII, Division 1 requirements.
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