OT Series
Expanflex type OT tanks are ASME fixed bladder type precharged expansion tanks equipped with an ExpanView tank integrity indicator. They are designed to absorb the expansion forces and control the pressure in heating/cooling systems. The system’s expanded water (fully compatible with water/glycol mixtures) is contained in a heavy-duty butyl bladder preventing tank corrosion and waterlogging problems.
OT expansion tanks reduce tank sizes by up to 80% and is meant for commercial and industrial heating/cooling systems, available in sizes from 7.8 gallons to 211 gallons.
Documents &
specification
Submittal
Installation Diagram
Installation, operation and maintenance
Download CAD files (.dwg)
Specifications
• ASME Section VIII construction and label
• Heavy-duty butyl bladder
• Permanent separation of air and water
• Smaller sizes for easier handling, and savings space and installation costs
• Can be manifolded for more capacity
• Factory precharged 12 PSI and field adjustable
• Equipped with ExpanView, a tank integrity indicator alerting the user of a bladder leak by changing color
Features OT Series
| Model | Tank volume (gal/L) | Acceptance volume (gal/L) | Connection (in) |
|---|---|---|---|
| OT15 | 7.8/30 | 6.3/24 | 3/4" |
| OT20 | 11/42 | 8.8/33 | 3/4" |
| OT40 | 25/95 | 20.2/76 | 1" |
| OT60 | 35/132 | 28/106 | 1" |
| OT80 | 45/170 | 36/136 | 1" |
| OT100 | 60/227 | 48.5/184 | 1" |
| OT120 | 70/265 | 56.5/214 | 1 1/2" |
| OT144 | 80/303 | 65/246 | 1 1/2" |
| OT180 | 90/341 | 73/276 | 1 1/2" |
| OT200 | 115/435 | 93/352 | 1 1/2" |
| OT240 | 140/3530 | 113.5/430 | 1 1/2" |
| OT260 | 158/598 | 128/485 | 1 1/2" |
| OT280 | 211/799 | 171/647 | 1 1/2" |
