52 GAL FLOOR HYD EXP TANK

ZHT200 is a Zilmet Cal-Pro floor-mounted hydronic expansion tank used in large boiler and closed-loop heating systems.

Product description

Zilmet ZHT200 Hydronic Expansion Tank
This model is a ~52.8 gallon diaphragm expansion tank designed to handle thermal expansion in commercial or large residential hydronic heating systems.

Key specifications

• Type: Hydronic expansion tank (closed-loop heating)
• Model: ZHT200
• Total capacity: ~52.8 gallons
• Acceptance volume: ~38 gallons (usable expansion capacity)
• Connection: 3/4" NPT
• Max pressure: ~90 PSI
• Max temperature: 210°F
• Construction: Carbon steel tank with internal rubber diaphragm
• Installation: Vertical, floor-mounted with base

What it does

In a hydronic heating system, water expands when heated. The ZHT200:

• absorbs large volume expansion from boiler systems
• stabilizes system pressure
• prevents relief valve discharge
• protects boilers, pumps, and piping from pressure spikes

Where it’s used

• Large residential boiler systems
• Commercial hydronic heating loops
• Multi-zone radiant floor heating
• Schools, apartments, and institutional HVAC systems