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Hydronic Expansion Tanks

hydronic expansion tanks are a primary device when it comes to pressurizing and maintaining pressure in a closed system. These tanks are also commonly referred to as hydro-pneumatic expansion tanks. The tanks we supply are manufactured by the globally renowned Zilmet company which is based out of Italy but has stock in the USA. Zilmet hydronic expansion tanks offer superior performance, operation, and durability, they also feature a strategically placed side connection for quicker and less expensive installation. These tanks also have a compact design with a seamless diaphragm that never stretches or creases. There are no bubbles or corners to trap sediment, which inhibits bacterial growth.

USA Roller Chain and Sprockets (USARC) is based out of Orlando Florida but we supply product to the globe, we are focused on providing the industry leading service we are known for as well as having competitive pricing. We sell products to the general public, re-sellers, and small to large commercial manufacturing facilities. to get a quote or for additional information on hydronic expansion tanks please contact us at sales@usarollerchain.com or call (407) 347-3519 and we will be happy to assist you.

Advantages of Hydronic Expansion Tanks

  • Each tank Is factory tested to ensure tank integrity
  • Certifies synthetic SBR rubber diaphragm
  • All diaphragms are designed to maximum drawdown
  • MIG welding to eliminate interior rough spots and sharp edges
  • Welded side outlet allows easy and quick installation
  • Low profile tank design with full membrane depth eliminates stretching of diaphragm thus providing increases cycle life
  • External baked on epoxy-polyester coating provides a durable. appliance like finish
  • Protected pre charge valve eliminates potential leak path
  • 5 year warranty on all hydronic expansion tanks

Hydronic Expansion Tank Material Description

Shell Material - Carbon Steel
Connections Material - Stainless Steel
Membrane Material - SBR Synthetic Rubber
Tank Color - Grey

Hydronic Expansion Tank Operating Conditions

Maximum Working Pressure 2 - 13.2 Gallons: 60 psi
Maximum Working Pressure 21 - 184 Gallons: 90 psi
Maximum Operating Tempiture: 210°F
Factory Pre Charge: 12 psi

2.1 - 13.2 Gallon Hydronic Expansion Tank - Inline

Model Capacity Diameter-ØD Height-H Connection Size-ØC Acceptance Volumes
ZHT8
2.1 Gallons 8.7" 11.6" 1/2" NPT 1.4
ZHT12
3.2 Gallons 11.6" 11.1" 1/2" NPT 2
ZHT18
4.8 Gallons 11.4" 14.8" 1/2" NPT 3
ZHT24
6.3 Gallons 12.8" 16.3" 1/2" NPT 3.9
ZHT35
9.2 Gallons 15.9" 16.1" 3/4" NPT 5.7
ZHT50
13.2 Gallons 16.0" 20.9" 3/4" NPT 8.1
Note: Maximum Operating temperature 210°F, Maximum Working Pressure 60 psi, Factory Pre Charge 12 psi

9.2 - 79.3 Gallon Hydronic Expansion Tank - With Base

Model Capacity Diameter-ØD Height-H Connection Height-E Connection Size-ØC Acceptance Volumes
ZHT35F
9.2 Gallons 15.9" 15.2" 4.7" 3/4" NPT 5.7
ZHT50F
13.2 Gallons 16.0" 20.0" 6.2" 3/4" NPT 8.1
ZHT80
21.1 Gallons 17.7" 23.9" 5.9" 3/4" NPT 15.3
ZHT105
27.7 Gallons 19.7" 26.2" 6.5"
3/4" NPT 20.1
ZHT150
39.6 Gallons 19.7" 35.3" 8.5" 3/4" NPT 28.8
ZHT200
52.8 Gallons 23.6" 32.0" 8.9" 3/4" NPT 38.4
ZHT250
66.0 Gallons 24.8" 37.0" 9.6" 3/4" NPT 48
ZHT300
79.3 Gallons 24.8" 43.5" 9.6" 3/4" NPT 57.7
Note: Maximum Operating temperature 210°F, Maximum Working Pressure 90 psi, Factory Pre Charge 12 psi

105.7 - 184.9 Gallon Hydronic Expansion Tank - With Base

Model Capacity Diameter-ØD Height-H Connection Height-E Connection Size-ØC Acceptance Volumes
ZHT400
105.7 Gallons 24.8" 57.1" 9.6" 3/4" NPT 76.8
ZHT500
132.1 Gallons 29.5" 52.8" 11.4" 1" NPT 96
ZHT600
158.5 Gallons 29.5" 61.2" 11.4" 1" NPT 115.2
ZHT700
184.9 Gallons 29.5" 69.1" 11.4" 1" NPT 134.2
Note: Maximum Operating temperature 210°F, Maximum Working Pressure 90 psi, Factory Pre Charge 12 psi

Assembly Diagram